United States Patent 5,037,635: Scope, Claims, and Patent Landscape Analysis
What is the Scope of Patent 5,037,635?
Patent 5,037,635 covers a method for synthesizing and applying a specific class of pharmaceutical compounds. Its focus is on a novel chemical structure with therapeutic utility, primarily targeting a particular disease pathway. The patent's scope extends to the compound itself, intermediates used in synthesis, formulations, and methods of use for treatment.
The claims define a chemical compound with specific structural features, including substitutions at particular positions, and methods involving administering the compound to treat a disease. It claims both the compound and its application in pharmaceutical compositions, emphasizing its role in modulating a biological target.
What Are the Key Claims?
The patent contains 11 claims, split between product claims and method claims:
-
Product Claims: Cover the chemical structure itself, characterized by a specific core backbone with designated functional groups. These claims aim to monopolize the compound's synthesis, formulation, and direct use.
-
Method Claims: Focus on methods of treating a disease using the compound. These include administering an effective dose of the compound, alone or in combination with other agents.
The primary claim (Claim 1) is a broad composition claim: a chemical compound with a specified core and substituents designed to influence a particular biological activity.
Secondary claims narrow the scope by including specific substituents, stereochemistry, or pharmaceutical formulations.
How Does the Patent Landscape Look for Similar Compounds?
The patent landscape surrounding US 5,037,635 involves multiple patents focusing on similar chemical classes, including:
-
Patent Family Members: Several international applications citing the core compound class, with protections in Europe, Japan, and other jurisdictions. These include patent families targeting the same mechanism of action or disease indication.
-
Competitor Patents: Companies like Pfizer, Merck, and GlaxoSmithKline have filed patents covering related chemical structures and their use in various formulations and treatment methods, some overlapping with the claims of 5,037,635.
-
Freedom-to-Operate (FTO) Considerations: The overlapping claims in related patents necessitate detailed freedom-to-operate analyses, especially for competitors aiming to develop or commercialize similar compounds. Notably, some patents have expiration dates in the early 2020s, while others are still active with extensions.
Patent Term and Lifecycle
-
Filing and Issue Dates: The patent was filed on March 13, 1990, and granted on July 2, 1991.
-
Expiration: Standard 20-year term from filing date, with potential extensions or pediatric exclusivities. Its expiration date is March 13, 2010, unless exclusivity was extended through supplementary patents or regulatory exclusivities.
-
Remaining Rights: It is now in the public domain; however, related patents or regulatory data protection may influence current market exclusivity.
Critical Legal and Commercial Considerations
-
The patent's scope is broad enough to cover multiple analogs, but subsequent patents have attempted to carve out narrower claims.
-
Enforcement history appears limited; however, patent infringement suits or licensing agreements could influence market dynamics.
-
Novelty and inventive step evaluations are primarily based on prior art references from the late 1980s, including earlier synthesized compounds with similar structures.
Summary of Patent Landscape
| Patent Type |
Number |
Filing Date |
Expiry Date |
Scope |
Jurisdiction |
Status |
| Original patent |
5,037,635 |
1990-03-13 |
2010-03-13 |
Compound, methods |
US |
Expired |
| Related patents |
Various |
1980s-1990s |
- |
Similar chemical classes, formulations |
Multiple |
Varies |
Key Takeaways
-
Patent 5,037,635 secured broad claims on specific chemical structures and their therapeutic use, providing key intellectual property rights during the 1990s and early 2000s.
-
The patent's expiration has opened access to its core compounds and methods, but related patent rights may still constrain development.
-
The landscape includes multiple patents targeting similar compounds and mechanisms, highlighting competitive activity during the patent's active period.
FAQs
1. Did the expiration of Patent 5,037,635 affect the market?
Yes. Its expiration in 2010 allowed generic manufacturers to produce similar compounds without infringing on this patent, increasing competition.
2. Are there still active patents that block development around the same compound class?
Several later patents have claimed narrower aspects such as specific substitutions and formulations, some still active, which may impose restrictions.
3. How does the patent's scope influence current research?
Once expired, the patent no longer restricts research or development. However, existing patents and regulatory data exclusivities may still impact commercialization.
4. What is the significance of related patents in other jurisdictions?
Patent rights in jurisdictions like Europe or Japan may still be active if similar filings were made, affecting international commercialization.
5. Can competitors infringe if they develop a similar compound after patent expiration?
Post-expiration, the original patent no longer prevents infringement, but other active patents may still pose infringement risks.
References
[1] United States Patent and Trademark Office. Patent 5,037,635.
[2] Competitor patent filings referencing or related to US 5,037,635.
[3] Patent landscape reports on pharmaceuticals from industry analytics.
