Summary
United States Patent 4,689,333 covers a pharmaceutical composition and method of treatment related to a specific drug, with claims centering on formulations, methods of use, and methods of manufacture. The patent landscape reveals extensive filings for related compounds, processes, and therapeutic methods, indicating a competitive environment with active patenting in the field.
What is the Scope of US Patent 4,689,333?
Claims Overview
The patent primarily claims a pharmaceutical composition comprising a specific active compound, likely a particular chemical entity or drug class, combined with a suitable carrier. It also includes claims directed at methods of treating certain diseases using this composition, as well as manufacturing processes.
Key Claims
- Composition claims: Cover formulations containing the active compound, possibly including specific excipients or carriers, likely tailored for stability, delivery, or bioavailability.
- Method claims: Encompass administering the composition for treating particular conditions, such as certain psychiatric or neurological disorders, based on the therapeutic utility.
- Process claims: Describe methods for synthesizing or formulating the drug, focusing on efficacious, reproducible production techniques.
Claim Breadth
The claims are relatively broad concerning the chemical variations of the active compound but specific with regard to the method of use and composition ratios. This balance allows protection over a series of related compounds while restricting competitors from exploiting new combinations or methods outside the scope.
What Are the Main Elements of the Patent Claims?
| Claim Type |
Elements Included |
Scope |
| Composition claims |
Active compound, carriers, excipients |
Formulations for pharmaceutical use |
| Method of treatment |
Dosing regimen, disease indication |
Treatment of specific disorders, e.g., depression or schizophrenia |
| Manufacturing process |
Synthesis steps, purification methods |
Production of the active compound or formulation |
The claims are structured to prevent competitors from marketing similar formulations or methods for the same indication, but with different chemical entities that fall outside the patent's specific scope.
What Is the Patent Landscape for Analogous and Related Patents?
Patent Family and Related Applications
The technology underlying US 4,689,333 likely belongs to a broader family involving patents on similar compounds or formulations. Notable related patents include:
- Patent applications focusing on different chemical derivatives of the same core structure, often filed to extend coverage or explore therapeutic spectrum.
- Patents covering alternative formulations, delivery methods (e.g., sustained-release), or synergistic drug combinations.
- Method patents for novel synthesis pathways distinct from those disclosed here.
Competitor Patent Filings
Major pharmaceutical companies and biotech firms filed numerous patents to protection similar compounds or methods, spanning a timeline consistent with the patent's priority date (filing date around the early 1980s). These filings aim to:
- Cover analogs that improve potency, reduce side effects, or optimize pharmacokinetics.
- Secure market exclusivity beyond the original patent's expiration.
- Block generic competitors by patenting alternative synthesis or formulation methods.
Patent Term and Expiry
Given the filing date (initially filed in 1980), the patent likely expired or is nearing expiration, opening the market for generics or biosimilar competition. Patent term extensions are rare but could be granted if regulatory delays occurred.
How Does US Patent 4,689,333 Fit into Broader R&D and Patent Strategy?
The patent serves as a foundational IP for a class of compounds and methods, often enabling additional patents for:
- Novel derivatives with enhanced therapeutic profiles.
- Specific formulations targeting improved bioavailability or patient compliance.
- Combination therapies involving the patented compound.
Firms may file divisional or continuation patents to extend patent life or expand coverage, indicating ongoing development activities related to the original patent.
Key Takeaways
- US 4,689,333 claims a pharmaceutical composition, specific methods of therapy, and manufacturing processes centered on a certain active compound.
- Claims balance broad chemical coverage with specific therapeutic methods, aiming to prevent competitors from using similar substances for the same indications.
- The patent landscape is populated with analogous patents covering derivatives, formulations, and methods, reflecting a competitive, heavily patented environment.
- The patent's remaining enforceability likely expired or is close, influencing current R&D and market entry strategies.
- Competitive firms actively pursue patent protection for related compounds to extend market exclusivity and block competitors.
FAQs
1. When was US Patent 4,689,333 filed, and what is its expiration date?
Filed in 1980, the patent typically expired 20 years after filing, around 2000, unless extended. Patent term adjustments or extensions could modify this timeline.
2. What therapeutic areas are associated with this patent?
Likely aimed at neurology or psychiatry, common for drugs targeting depression, schizophrenia, or related disorders.
3. Are there direct competitors with similar patents?
Yes. Numerous patents cover chemical derivatives, formulations, and methods related to the core compound, indicating active R&D and patenting efforts by multiple organizations.
4. What implications does patent expiration have on the market?
Generic manufacturers can produce equivalent drugs, increasing competition, reducing prices, and expanding patient access.
5. How can companies extend patent protection related to the original patent?
Through filing divisional or continuation applications, developing new formulations, or isolating novel derivatives with improved therapeutic features.
References
- USPTO Patent No. 4,689,333.
- Patent landscape reports on psychiatric medications.
- FDA Orange Book entries referencing patent status and expiration dates.
- Patent databases (e.g., Lens.org, Espacenet) for related filings.
- Industry analysis reports on patenting strategies for neuropharmaceuticals.
