Lifescience sits between pharma and biotech, but it covers its own distinct territory diagnostics, research tools, lab instrumentation, and biomarker discovery. A lot of the value in this space comes from tools that enable other research, which raises its own patentability questions: can you patent a method of diagnosis, or only the device that performs it?
This post covers what’s patentable in lifescience, why diagnostic methods are treated differently from diagnostic devices, where innovation is concentrated, and how PATHtoIP fits into the process.
What Makes a Lifescience Invention Patentable
The Three Basic Tests
Novelty, inventive step, and industrial applicability apply as usual, but lifescience inventions are frequently challenged on the second test, since many diagnostic advances build incrementally on known biomarkers or known lab techniques.
What Typically Gets Filed
- Diagnostic devices and instruments
- Assay methods and lab protocols
- Biomarker discovery tied to a specific diagnostic or therapeutic use
- Research tools and reagents
- Bioinformatics methods for analyzing biological data
Search and Freedom to Operate
Patentability Search
Lifescience search needs to cover both patent literature and scientific publications closely, since a biomarker or method is often disclosed in a journal article well before any patent filing.
Freedom to Operate
Particularly relevant when a diagnostic method relies on a licensed platform (like a specific sequencing or imaging technology), since the underlying platform IP is often separately owned.
India vs. the US: A Quick Comparison
| India | United States | |
| Governing law | Patents Act, 1970 | 35 U.S.C. (Patent Act) |
| Diagnostic methods practiced on the human/animal body | Excluded under Section 3(i) | Face heightened scrutiny post-Mayo v. Prometheus (2012) but aren’t categorically excluded |
| Natural correlations (e.g., a biomarker-disease link) | Generally not patentable on their own | Not patentable on their own post-Mayo, must add an inventive application |
| Diagnostic devices/instruments | Patentable | Patentable |
Section 3(i) in India draws a hard line: methods of diagnosis practiced on the human or animal body are excluded outright, regardless of novelty. The US doesn’t have an identical categorical bar, but Mayo v. Prometheus achieves something similar in practice — a natural correlation between a biomarker and a disease state isn’t patentable by itself; the claim needs to add a genuinely inventive application on top of the correlation.
Where Innovation Is Actually Happening
Liquid Biopsy and Early Cancer Detection
Blood-based diagnostic methods replacing more invasive procedures.
Companion Diagnostics
Tests designed to work alongside a specific drug, increasingly filed as part of a combined pharma-diagnostic IP strategy.
Point-of-Care Testing
Compact diagnostic devices designed for use outside centralized labs.
Bioinformatics and AI-assisted Diagnostics
Software methods for interpreting genomic or biological data — an area that increasingly overlaps with software patentability questions.
Protecting the Product from Every Angle
Patents
Cover the diagnostic device or the inventive application built on top of a biomarker, not the biomarker correlation itself.
Trade Secrets
Lab protocols, calibration methods, and proprietary reference datasets are often kept as trade secrets, since they’re difficult for a competitor to reconstruct from the finished product alone.
Trademarks
Branding for a diagnostic test or platform, increasingly important as life science companies compete on trust and recognition in a crowded diagnostics market.
How PATHtoIP Helps
- Patentability searches across both patent and scientific literature, given how early lifescience findings often get published
- Freedom to Operate analysis for diagnostic methods built on licensed platforms
- Patent drafting and filing structured to clear Section 3(i) in India by claiming the device or inventive application rather than the underlying correlation
- Trademark filing for diagnostic products and platforms
- Technology landscape analysis to identify where a biomarker or method is already crowded with prior filings
Frequently Asked Questions
Can I patent a method of diagnosing a disease in India?
Not directly if the method is practiced on the human or animal body, Section 3(i) excludes it. What can often be patented instead is the diagnostic device or a specific inventive application built around the diagnostic insight.
Why did the Mayo v. Prometheus case matter for diagnostics in the US?
It established that a natural correlation between a biomarker and a disease isn’t patentable on its own — a claim needs to add something genuinely inventive beyond just observing and applying the natural law.
Is a diagnostic device patentable even if the method behind it isn't?
Often yes. The instrument, assay kit, or specific technical implementation can be patentable even where the underlying method or correlation faces exclusions.
Working on a diagnostic method, device, or research tool and not sure where it stands? PATHtoIP can help you map it out, reach out at info@pathtoip.com.
