Can You Patent a Process? Manufacturing vs. Business Methods (2026)

By Michael Meyer, USPTO-Registered Patent Attorney | Updated March 2026

"Can you patent a process?" is one of the most common questions inventors ask — and the answer depends entirely on what kind of process you're trying to patent. A manufacturing process that transforms raw materials into a finished product? Almost certainly patentable. A business method for organizing financial transactions? Almost certainly not patentable after the Supreme Court's Alice decision.

This guide explains what qualifies as a patentable process under current law, the critical distinction between manufacturing processes and business methods, how the Mayo/Alice two-step test determines eligibility, and how to draft process claims that survive § 101 examination.

Table of Contents

1. What Is a Process Patent?
2. Manufacturing Processes vs. Business Methods: The Critical Distinction
3. The Mayo/Alice Two-Step Test for Process Patents
4. What Processes ARE Patentable?
5. What Processes Are NOT Patentable?
6. The Machine-or-Transformation Test
7. Real Examples: Successful vs. Failed Process Patents
8. How to Draft a Process Claim That Survives § 101
9. Frequently Asked Questions

1. What Is a Process Patent?

Under U.S. patent law, a process (also called a method) is one of the four statutory categories of patent-eligible subject matter under 35 U.S.C. § 101:

• Processes — methods or series of steps that produce a result
• Machines — physical devices with interrelated parts
• Manufactures — articles made by human hands
• Compositions of matter — chemical compounds, mixtures, new materials

A process patent protects a method of doing something — a series of steps that achieve a result. Process patents are granted as utility patents and last 20 years from the filing date.

Examples of Processes in Different Fields

The key question is whether the process is patent-eligible under § 101 — and that depends on whether the process is directed to an abstract idea, law of nature, or natural phenomenon, or whether it involves sufficient concrete application to qualify.

2. Manufacturing Processes vs. Business Methods: The Critical Distinction

Not all processes are created equal under current patent law. The most important distinction is between manufacturing processes (which generally survive § 101 challenges) and business methods (which almost never do post-Alice).

Manufacturing Processes (Usually Patentable)

A manufacturing process involves transforming physical materials or controlling physical equipment to produce a tangible product. These processes typically satisfy the machine-or-transformation test because they either:

• Transform an article into a different state or thing, OR
• Are tied to a particular machine or apparatus

Examples of patentable manufacturing processes:

• A method of heat-treating steel to achieve specific hardness properties
• A process for extruding aluminum with a novel die configuration
• A method of 3D printing composite materials layer-by-layer
• A chemical synthesis route for producing a compound from specific starting materials

Business Methods (Almost Never Patentable Post-Alice)

A business method is a way of organizing commercial activity, managing financial transactions, or structuring business relationships. These processes are typically directed to abstract ideas and fail § 101 eligibility unless they include unconventional technical elements.

Examples of business methods that are NOT patentable:

• A method of hedging risk in commodity trading (invalidated in Bilski v. Kappos)
• A method of processing financial transactions using escrow (invalidated in Alice Corp. v. CLS Bank)
• A method of verifying credit card transactions online using conventional computers
• A method of organizing a corporate hierarchy or managing employee workflows

The Supreme Court has made clear that simply applying an abstract business concept on a generic computer does not make it patent-eligible. See our full guide to Alice and patent eligibility for more on this framework.

3. The Mayo/Alice Two-Step Test for Process Patents

All process patent claims must pass the Mayo/Alice two-step test to be patent-eligible under 35 U.S.C. § 101:

Step 1: Is the Claim Directed to a Judicial Exception?

Ask: Is the process claim directed to:

• An abstract idea (mathematical algorithm, fundamental economic practice, method of organizing human activity)?
• A law of nature (natural correlation, physical principle)?
• A natural phenomenon (naturally occurring process)?

If NO — the claim is patent-eligible.
If YES — proceed to Step 2.

Step 2: Does the Claim Add "Significantly More"?

Ask: Do the additional elements in the claim transform the nature of the claim into a patent-eligible application? Specifically, do they:

• Improve the functioning of a computer or other technology?
• Apply the abstract idea with a particular machine or apparatus in an unconventional way?
• Transform the article into a different state or thing?
• Add unconventional steps that are not well-understood, routine, and conventional in the field?

If YES — the claim is patent-eligible.
If NO — the claim fails § 101.

For process patents, most manufacturing and industrial processes easily pass this test because they involve physical transformation or operation of specific equipment. Business methods and software processes typically fail unless they solve a concrete technical problem.

4. What Processes ARE Patentable?

The following categories of process patents are generally patent-eligible under current law:

Manufacturing and Industrial Processes

• Methods of manufacturing articles — injection molding, casting, forging, machining, welding, stamping
• Methods of treating or processing materials — heat treatment, surface coating, anodizing, plating
• Methods of assembling components — novel assembly sequences, automated assembly using robotics

Chemical and Pharmaceutical Processes

• Methods of synthesizing compounds — reaction pathways, catalytic processes, purification techniques
• Methods of formulating drugs — encapsulation, controlled-release mechanisms, stability improvements
• Methods of crystallizing compounds — polymorphic forms, crystallization conditions

Biotechnology Processes

• Methods of producing recombinant proteins — expression systems, purification protocols
• Methods of gene editing — CRISPR applications tied to specific cell types or delivery systems
• Methods of culturing cells — novel growth media, bioreactor conditions

See our biotechnology patent law guide for more on biotech process eligibility post-Mayo.

Agricultural and Food Processing Methods

• Methods of processing food products — pasteurization, fermentation, dehydration
• Methods of cultivating crops — hydroponics systems, controlled environment agriculture

Software Processes (If They Pass Alice)

• Methods that improve computer functionality — data compression tied to specific hardware, network routing optimizations
• Methods solving technology-specific problems — image rendering techniques, memory management in constrained systems

See our software patents guide for detailed analysis of what software processes survive Alice.

5. What Processes Are NOT Patentable?

The following categories face § 101 patent-eligibility challenges and are difficult or impossible to patent under current law:

Abstract Business Methods

• Methods of organizing commercial transactions
• Methods of managing financial accounts or investments
• Methods of marketing or advertising using conventional techniques
• Methods of managing corporate structures or employee relationships

Mental Processes and Fundamental Practices

• Methods of performing calculations in your head or on paper
• Methods of organizing information conceptually
• Methods of teaching or learning based on conventional instruction

Data Manipulation Without Technical Application

• Methods of collecting and displaying data using generic computers
• Methods of analyzing data without a concrete technical application
• Methods of receiving, processing, and transmitting information over conventional networks

Diagnostic Correlations (Post-Mayo)

• Methods of correlating biomarker levels with disease states using routine measurement techniques
• Methods of selecting treatment based on genetic variants without additional unconventional steps

6. The Machine-or-Transformation Test

The machine-or-transformation test has been the traditional framework for evaluating process patent eligibility. Although it is no longer the sole test after Bilski v. Kappos (2010), it remains an important and useful indicator.

A process is likely patent-eligible if it satisfies one or both prongs:

The Machine Prong

The process is tied to a particular machine or apparatus in a way that imposes meaningful limits on the claim's scope. The machine must be integral to the process, not merely an object on which the process is performed.

Example that satisfies the machine prong: A method of controlling a CNC milling machine to cut complex geometries by adjusting feed rate based on real-time sensor data.

Example that does NOT satisfy: A business method performed "on a computer" where the computer is merely a generic tool for calculation.

The Transformation Prong

The process transforms an article into a different state or thing. The transformation must be central to the purpose of the claimed process and involve a particular article.

Example that satisfies the transformation prong: A method of vulcanizing rubber by heating it with sulfur to create cross-linked polymer chains with different physical properties.

Example that does NOT satisfy: A method of organizing data in a database where the "transformation" is merely moving bits around in memory.

Manufacturing, chemical, and biotechnology processes typically satisfy the transformation prong because they involve physical changes to materials. Business methods and pure software processes typically do not.

7. Real Examples: Successful vs. Failed Process Patents

✅ Successful Process Patents

❌ Failed Process Patent Claims (Invalidated Post-Alice)

8. How to Draft a Process Claim That Survives § 101

Drafting patent-eligible process claims in the post-Alice era requires strategic choices:

Emphasize Physical Transformation

If the process transforms materials or articles, the claims should explicitly describe the transformation. Use language like "reacting," "heating," "mixing," "polymerizing," "depositing," "etching" — verbs that indicate physical change.

Example: "A method of forming a polymer film, comprising: depositing a monomer layer on a substrate; exposing the monomer to UV radiation to initiate polymerization; and cross-linking the polymer chains to form a film having [specific properties]."

Tie the Process to Specific Apparatus

If the process is performed using particular equipment, include those details in the claims. The apparatus should impose meaningful limits, not just be a generic tool.

Example: "A method of controlling a laser cutting system, comprising: measuring material thickness using an optical sensor; adjusting laser power based on measured thickness according to [specific algorithm]; and cutting the material along a defined path."

Avoid Pure Abstract Steps

Claims that recite only abstract steps like "determining," "calculating," "comparing," "selecting," "displaying" without tying them to a specific technical implementation are vulnerable to § 101 rejection.

Weak claim: "A method comprising: collecting user data; analyzing the data to identify patterns; and displaying recommendations."

Stronger claim: "A method of real-time gesture recognition comprising: capturing video frames from a depth camera; processing pixel depth data using [novel algorithm] to extract 3D hand coordinates; and mapping hand movement to control commands for a robotic system."

Include Unconventional Technical Details

The specification should explain why the claimed process is not routine and conventional in the field. Include data showing unexpected results, technical challenges overcome, or advantages not achievable with prior art methods.

9. Frequently Asked Questions

Can you patent a process or method?

Yes — processes (also called methods) are one of the four statutory categories of patent-eligible subject matter under 35 U.S.C. § 101. However, the process must be novel, non-obvious, and patent-eligible under the Mayo/Alice framework. Manufacturing processes, chemical processes, and industrial methods are generally patentable. Business methods and abstract processes are difficult to patent post-Alice.

What is the difference between a process patent and a utility patent?

A process patent is a type of utility patent. Utility patents cover four categories: processes, machines, manufactures, and compositions of matter. A process patent specifically protects a method or series of steps. The term "utility patent" is broader and includes all four categories.

Can you patent a business process?

Business processes are extremely difficult to patent after the Supreme Court's Alice Corp. v. CLS Bank decision (2014). Most business methods are considered abstract ideas and fail § 101 patent eligibility unless they include unconventional technical elements that solve a technology-specific problem. Simply implementing a business method on a generic computer is not enough to make it patent-eligible.

What is the machine-or-transformation test?

The machine-or-transformation test asks whether a process: (1) is tied to a particular machine or apparatus in a meaningful way, OR (2) transforms an article into a different state or thing. Processes that satisfy either prong are more likely to be patent-eligible. This test is no longer the sole determinant after Bilski, but it remains a useful indicator for process patent eligibility.

Can you patent a manufacturing process?

Yes — manufacturing processes are among the most straightforward categories of patent-eligible processes. Methods of making products, treating materials, assembling components, and controlling manufacturing equipment are all patentable if they are novel and non-obvious. Manufacturing processes typically satisfy the transformation prong of the machine-or-transformation test.

Can you patent a software process?

Software processes can be patented if they improve computer functionality, solve a technology-specific problem, or are tied to specific hardware in an unconventional way. Pure data manipulation, organizing information, or implementing abstract ideas on a generic computer are not patent-eligible. See our software patents guide for detailed analysis of what survives Alice.

What processes are NOT patentable?

Processes directed to abstract ideas, laws of nature, or natural phenomena are not patent-eligible unless they include significantly more than the judicial exception. This includes: most business methods, mental processes, diagnostic correlations based on natural relationships (post-Mayo), and data collection/analysis using conventional techniques. The key question is whether the process applies an abstract concept in a concrete, unconventional technical way.

How long does a process patent last?

Process patents are granted as utility patents and last 20 years from the filing date of the non-provisional application. Maintenance fees must be paid at 3.5, 7.5, and 11.5 years after grant to keep the patent in force.

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