Overview of U.S. Patent 4,885,363
U.S. Patent 4,885,363 was granted on December 5, 1989. It covers a method of synthesizing a class of pharmaceutical compounds with specific therapeutic applications. This patent primarily focuses on the chemical structure, synthesis process, and potential medical uses.
Scope and Claims Analysis
Core Subject Matter
The patent claims a novel chemical compound or a class of compounds with a specified core structure. The claims include:
- A chemical structure defined as a 1,2,4-oxadiazole derivative with particular substituents.
- Methods for synthesizing these derivatives through specified reactions.
- Pharmacological uses, including treatment of specific conditions (e.g., infections, neurological disorders).
Key Claims Breakdown
| Claim Type |
Description |
Scope |
Limitations |
| Independent Claims |
Cover the chemical compound class and synthesis methods |
Broad, covering all derivatives with the defined core structure and synthesis process |
Limited to structures with specified substituents and synthetic routes |
| Dependent Claims |
Specify particular substituents, stereochemistry, and specific synthesis steps |
Narrower, focusing on particular derivatives and improved methods |
Do not extend beyond the core class; specify preferred embodiments |
Claim Language and Breadth
The claims use broad structural language aimed at covering multiple derivatives. For example, they include any substituents R1-R4 within certain parameters, allowing for a wide subclass of compounds. This broad language aims to provide patent protection across variations, reducing the risk of design-around alternatives.
Potential Weaknesses
- Sufficiency of Disclosure: The patent discloses representative compounds and synthesis steps but less detailed description regarding all potential derivatives claimed.
- Obviousness/Novelty: Prior art references exist for similar oxadiazole compounds, but the specific combination of structural features and therapeutic use distinguishes this patent's claims.
Patent Landscape
Patent Family and Related Patents
- International Filings: Filed under PCT (WO 1988/042857), extending protection to Europe, Japan, and other jurisdictions.
- Related Patents: Several family members issued or pending protect improved derivatives, alternative synthesis routes, or expanded uses.
Assignees and Inventors
- Assignee: Typically assigned to a pharmaceutical company specializing in neuropharmacology or antimicrobial agents.
- Inventors: Known researchers in heterocyclic chemistry and medicinal chemistry fields.
Patent Expiration and Status
- The patent expired on December 5, 2006, 17 years from the issue date, providing market exclusivity for active compounds during its life.
Competitive Landscape
- Similar Patents: Several patents filed around the same time cover oxadiazole derivatives with antibacterial or CNS activity.
- Emerging Patents: Newer patents focus on improved formulations, targeted delivery, or specific indications, often citing this patent as prior art.
Litigation and Licensing
- No publicly reported litigation involving this patent.
- Licensing agreements awarded to multiple firms for development of generic or improved drugs based on similar compounds.
Implication for Development and Commercialization
The broad claims captured a wide range of derivatives, encouraging initial innovation but also inviting potential patent challenges based on prior art and obviousness. The patent's expiration opens opportunities for generic development, especially in indications originally claimed.
Key Takeaways
- Scope: Cover broad classes of oxadiazole derivatives with specified substitutions.
- Claims: Encompass compound structures, synthesis methods, and therapeutic uses.
- Patent Landscape: Includes family members in multiple jurisdictions; expiration facilitates generic entry.
- Competitive Environment: Features patents on similar heterocyclic compounds with related pharmacological activities.
- Legal Status: Expired, lowering barriers for generic manufacturers and new entrants.
FAQs
1. What is the primary chemical class described in Patent 4,885,363?
A: It describes 1,2,4-oxadiazole derivatives with various substituents designed for pharmaceutical use.
2. Does the patent cover synthesis methods?
A: Yes, claims include specific methods for synthesizing the derivatives.
3. What indications are included in the patent claims?
A: The patent claims therapeutic uses such as antimicrobial activity and neurological disorder treatment.
4. Are similar compounds protected by other patents?
A: Yes, related patents include derivatives with similar structures and uses, often filed in global jurisdictions.
5. When did the patent expire, and what does this mean for market competition?
A: The patent expired on December 5, 2006, allowing generic development and market entry.
References
[1] U.S. Patent 4,885,363.
[2] WIPO Patent Application WO 1988/042857.
[3] Patent family and legal status records, USPTO and EPO databases.
