Can a bacterium be patented?

An engineered bacterium can be (Diamond v. Chakrabarty, 1980). A naturally occurring organism claimed as it exists in nature falls under the product-of-nature exception.

Which USPTO Technology Center examines microbiology patents?

Technology Center 1600 (Biotechnology and Organic Chemistry).

Patent bar eligibility by degree

Microbiology and the Patent Bar

Q: Does a clinical laboratory science degree qualify?

Not under Category A. You would apply under Category B; Option 2 accepts 8 semester hours of chemistry or physics plus 24 semester hours of biology, botany, microbiology or molecular biology.

Microbiology is a Category A subject in the USPTO General Requirements Bulletin. A bachelor's, master's or Ph.D. in microbiology qualifies you to apply for the patent bar.

Check your eligibility Full eligibility guide

At a glance

USPTO category: Category A
Listed subject: Microbiology
Degree levels: Bachelor's, master's or Ph.D.
Main Technology Centers: TC 1600

Checked against the August 2026 bulletin

Eligibility

Does a Microbiology degree qualify?

Yes. The USPTO General Requirements Bulletin (August 2026 edition) lists Microbiology in Category A, the degree-based route to the registration exam. An applicant with a bachelor's, master's or Doctor of Philosophy degree in a listed subject from an accredited U.S. college or university, or the foreign equivalent, meets the scientific and technical requirement without a course-by-course review.

Clinical and medical laboratory science degrees are not on the Category A list, but microbiology courses are named in Category B Option 2 (8 semester hours of chemistry or physics plus 24 of biology, botany, microbiology or molecular biology).

Your OED application

Exactly what to submit

An official transcript from the college or university that shows the degree was awarded. A transcript issued to you is accepted if it carries the school's stamp or seal.
Not a diploma or a letter. A diploma, a copy of a transcript or a registrar's letter naming your degree does not meet the requirement.
Course descriptions if the title isn't an exact match. If your degree title differs from the listed subject, OED checks equivalence; the OED FAQ suggests sending course descriptions with the first application to avoid delay.
Foreign degrees: objective evidence of U.S. equivalence, such as an evaluation from a foreign-credential evaluation service, alongside the transcript.

The rest of the application (forms, fees and the moral-character questions) is covered step by step in the OED application guide.

Practice

Patent work for microbiology graduates

Registered practitioners usually draft and prosecute applications in the technology they trained in. In this field that means work such as:

Technology area	Example inventions
Industrial microbiology	Engineered strains that produce chemicals or enzymes by fermentation.
Vaccines and antimicrobials	Attenuated strains, new antibiotic classes, bacteriophage therapy.
Microbiome products	Probiotic compositions, defined bacterial consortia.
Pathogen diagnostics	PCR assays, rapid culture-free detection.
Food microbiology	Starter cultures, preservation methods.

USPTO

Which Technology Centers examine this work

The USPTO routes each application to one of its Technology Centers by its classification. For microbiology subject matter, these are the ones you will deal with most:

Technology Center	Why it applies
TC 1600 Biotechnology and Organic Chemistry	Biotechnology, including microorganisms, vaccines and microbial processes.

Routing follows each application's classification, so a single application can land outside these centers.

Patent law

Biological deposits and engineered organisms

When a claimed microorganism cannot be reproduced from the written description, the applicant can deposit it in a recognized depository. The deposit rules (37 CFR 1.801–1.809; MPEP 2401–2411) are tested. Engineered bacteria are patentable (Diamond v. Chakrabarty, 1980); a naturally occurring strain claimed as found in nature is not.

The registration exam itself tests patent law and USPTO procedure from the MPEP, not your technical field. See the patent bar exam overview for format and scoring.

Pay data

What the occupation pays

The U.S. Bureau of Labor Statistics reports a median annual wage of $87,990 for microbiologists as of May 2025 (BLS Occupational Outlook Handbook).

That figure is for the engineering or science occupation itself, not for patent agents or attorneys.

Other routes

If your degree title differs

Category A is matched on the subject your transcript names. Titles close to microbiology are handled like this:

Microbiology and Immunology: Not printed in the bulletin. OED decides equivalence to Microbiology; include course descriptions.
Medical or Clinical Laboratory Science: Not on the Category A list. Category B Option 2 is the usual route.
Molecular Biology: A separate Category A subject. See the Molecular Biology page.

If you don't qualify under Category A, Category B counts science and engineering coursework (courses for science or engineering majors, grade C- or better):

Option 1: 24 semester hours in physics (physics courses for physics majors).
Option 2: 32 semester hours: 8 in chemistry or physics plus 24 in biology, botany, microbiology or molecular biology.
Option 3: 30 semester hours in chemistry (chemistry courses for chemistry majors).
Option 4: 40 semester hours: 8 in chemistry or physics plus 32 in other listed science and engineering subjects.

Category C is for applicants with a bachelor's degree who pass the Fundamentals of Engineering (FE) exam. Run your transcript through Do I Qualify? for a quick check, then read the full eligibility guide.

FAQ