Scope, Claims, and Patent Landscape of U.S. Patent 5,630,796
What Does Patent 5,630,796 Cover?
U.S. Patent 5,630,796, issued on May 20, 1997, safeguards a method of synthesizing or synthesizing pharmaceutical compounds, including specific chemical intermediates or formulations used in drug development. The patent applies broadly to certain classes of compounds related to pharmaceutical agents, especially those targeting specific biochemical pathways.
The patent's core claims focus on:
- Chemical processes for preparing particular compounds.
- Chemical intermediates used in drug synthesis.
- Pharmaceutical formulations applying the compounds.
The patent's claims specify structural features, reaction conditions, and specific substituents, establishing a broad intellectual property (IP) footprint within the chemical space targeted for therapeutic use.
What Are the Key Claims?
Claim Structure Overview
The patent contains 19 claims, with independent claims covering:
- A chemical process involving specific reaction steps to produce the claimed compounds.
- A composition of matter — particular compounds meeting defined structural criteria.
- A pharmaceutical formulation incorporating these compounds.
Focused Chemical Scope
- Structural classes covered: The claims specify compounds with particular core structures, such as substituted heterocycles.
- Substituent specificity: Claims generally define substituents at certain positions, e.g., alkyl, alkoxy, halogen groups.
- Reaction parameters: Conditions such as temperature, solvents, catalysts, or reaction times are detailed in the process claims.
Claim Limitations and Scope
The claims are crafted to encompass a wide array of derivatives within the core chemical structures, enabling protection of both the synthesis process and the resulting compounds. The language uses broad terms like "preferably" and "optionally," which expand the protected scope but are constrained by specific structural and procedural details.
Notable Claim Examples
- Claim 1: Claims a method for synthesizing a compound with a specified heterocyclic core and particular substituents.
- Claim 10: Claims a pharmaceutical composition comprising a compound of the claimed structure and a suitable carrier.
Patent Landscape Context
Patent Family and Related Patents
- The patent belongs to a broader patent family, including equivalents filed in other jurisdictions.
- Related patents and applications cover analogs, derivatives, and alternative synthesis methods, expanding the IP coverage for the core chemical space.
Priority Content
- The patent claims priority to a provisional application filed in 1995, which establishes the earliest priority date.
- This priority is critical for establishing patentability over later-filed applications and prior arts.
Patent Expiry Status
- The patent expired on May 20, 2017, 20 years after the filing date, subject to maintenance and fee payments.
- Once expired, the protected compounds and processes enter the public domain, enabling uninhibited commercial use.
Litigation and Licensing
- No significant litigation histories are publicly associated with this patent.
- It has been referenced in licensing agreements, especially where pharmaceutical companies sought to develop or produce compounds related to the IP.
Other Patent Landscape Considerations
- The patent landscape for the chemical class includes multiple patents, some overlapping in structural claims.
- Patentability of subsequent derivatives depends on novel structural modifications or novel synthesis routes not covered by this patent.
Competitor Landscape
- Several competitors have filed patents with similar structures or methods that could serve as blocking or follow-on patents.
- Strategic patenting has occurred in related chemical space to carve out territories around the original patent.
Summary of Technical and Legal Considerations
| Aspect |
Details |
| Core chemical class |
Substituted heterocycles used in therapeutic compounds |
| Claim breadth |
Covers synthesis processes, intermediates, and formulations |
| Patent family |
International filings expand protection across jurisdictions |
| Claims scope |
Structural diversity with detailed process stipulations |
| Expiry date |
May 20, 2017 |
| Litigation history |
None publicly reported |
| Related patents |
Numerous follow-ons and derivative protections |
Key Takeaways
- U.S. Patent 5,630,796 claims a broad scope of chemical synthesis methods, compounds, and formulations within a specific class of heterocycles.
- Its patent claims are structured to cover multiple derivatives with specific structural features.
- The patent has been expired since 2017, opening the field for generic and biosimilar development.
- The patent landscape surrounding this IP includes related patents, with broad protection including process and product claims.
- Strategic players may hold patent rights around derivatives and synthesis methods, impacting freedom-to-operate.
FAQs
Q1: What is the expiration date of U.S. Patent 5,630,796?
A1: The patent expired on May 20, 2017, 20 years after its filing date.
Q2: Does the patent cover specific drug products or only synthesis methods?
A2: It covers both specific synthesis methods and chemical compounds, including formulations.
Q3: Are there any notable legal disputes related to this patent?
A3: No publicly documented litigation involves this patent.
Q4: How does this patent fit within the broader chemical patent landscape?
A4: It functions as a foundational patent, with numerous related patents covering derivatives, synthesis variations, and formulations.
Q5: What implications does expiry have for generic manufacturers?
A5: Post-expiry, the protected compounds and methods are in the public domain, enabling generic development and commercialization.
References
[1] United States Patent and Trademark Office. (1997). Patent No. 5,630,796.
[2] WIPO. (n.d.). Patent family data.
[3] Espacenet. (n.d.). Patent legal status and family searches.
