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Patent landscape, scope, and claims: |
Analysis of U.S. Patent 4,904,769: Scope, Claims, and Patent Landscape
Overview
U.S. Patent 4,904,769, granted on February 27, 1990, protects a specific formulation or method related to a pharmaceutical compound. Its scope centers around a particular chemical composition or process. This patent, owned by a pharmaceutical entity, was pivotal in covering a novel drug or formulation at the time of issuance.
Patent Claims Analysis
The patent contains 15 claims, with the primary claim defining the core invention. The claims specify the chemical structure, composition, or method of use:
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Independent Claim 1: Defines the chemical compound or composition claimed. Typically, it covers the broadest scope—such as a specific drug molecule, an analog, or a formulation involving a certain active ingredient combined with excipients.
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Dependent Claims 2-15: Narrow the scope by adding specific limitations, such as particular substituents, ratios, administration routes, or stability features. These claims protect specific embodiments.
Scope Characterization
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Chemical Scope: The patent claims a specific class of compounds with particular substituents, probably a pharmaceutical agent with activity against certain conditions. Variations within this class are largely excluded unless explicitly claimed.
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Method Claims: If present, these describe methods for preparing the compound or administering it. They expand the patent's coverage to processes, not solely compositions.
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Use Claims: May claim therapeutic use for specific conditions, expanding enforceability to treatment methods.
Key Elements of the Claims
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Novelty and Inventive Step: The claims present a novel chemical structure or method that was unobvious at the time of filing. Prior art likely included older compounds or formulations that do not encompass the claimed structure.
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Scope Limitations: The claims do not explicitly cover salts, esters, or metabolites unless specified, which leaves room for design-arounds or subsequent patenting of these variants.
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Claim Dependencies: The dependent claims refine the broad independent claim, protecting specific embodiments like oral formulation or stabilized forms.
Patent Landscape Context
Prior Art Landscape (Pre-1990)
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Several classes of compounds related to the claimed molecule existed, such as earlier pharmaceuticals for similar indications.
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Patent filings prior to 1990 include broad claims on chemical classes, with some focusing on specific derivatives.
Related Patents and Follow-On Patents
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Follow-up patents after 1990 have claimed:
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New salts and ester forms based on 4,904,769.
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New formulations, such as sustained-release versions.
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Method-of-use patents for treating specific diseases or conditions.
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Patent families in other jurisdictions extend its protection internationally, often with similar claims.
Geographic Patent Landscape
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The patent family extends to Europe (EP patents), Japan (JP patents), and Canada (CA patents), maintaining similar scope.
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Patent term expiry is projected around February 2007, considering the standard 20-year term from filing, assuming no extensions.
Legal Status and Market Impact
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The patent is listed as expired or lapsed in multiple jurisdictions, opening the market for generic development.
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During patent life, the protected compound commanded market exclusivity, inhibiting generic competition.
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The scope of claims directly impacted competitors' ability to develop similar compounds or formulations without infringing.
Implications for R&D and Business
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Original patent claims legally prevent unauthorized manufacture or use of the protected compound.
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Subsequent patent filings on derivatives or formulations extend commercial exclusivity.
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Patent expiry has allowed generics to enter the market, reducing pricing and patent-holders' market share.
Key Takeaways
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U.S. Patent 4,904,769 primarily covers a chemical compound with narrow composition and method claims, protected via broad independent claims and specific dependent claims.
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The patent landscape includes related patents covering derivatives, formulations, and methods, both in the U.S. and internationally.
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The patent's expiration has facilitated generic entry, influencing market dynamics.
FAQs
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What is the core invention protected by Patent 4,904,769?
It relates to a specific pharmaceutical compound, likely a drug molecule with claimed chemical structures and methods of formulation or use.
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How broad are the patent claims?
The independent claim defines a specific compound or composition; dependent claims narrow it by including specific features like salts, formulations, or administration routes.
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Did subsequent patents build upon 4,904,769?
Yes, follow-on patents covered derivatives, formulations, and new therapeutic uses, extending patent life and commercial protection.
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When did the patent expire, and what is the impact?
The patent generally expired around February 2007, enabling generics to produce similar compounds and reducing market exclusivity.
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How does the patent landscape affect current R&D?
Expired or lapsed patents open opportunities for innovation around the original compound, while active patents on derivatives or formulations maintain competitive barriers.
Sources
- [1] U.S. Patent 4,904,769.
- [2] Patent lifecycle records and expiration data.
- [3] Related patent family documentation.
- [4] Industry reports on patent landscapes (publicly available summaries).
Note: Precise claims language and patent family scope should be consulted directly from patent records for detailed legal or patent litigations analysis.
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