Scope and Claims of U.S. Patent 4,026,894

U.S. Patent 4,026,894, issued on May 31, 1977, covers specific formulations and methods for the medical application of certain chemical compounds. The patent relates to a drug used primarily for therapeutic purposes, with a focus on a novel preparation and its use. The most critical claims define the composition of matter, dosage form, and methods of administration, aiming to secure exclusive rights over its specific formulation and therapeutic method.

Patent Claims

The patent comprises 11 claims, primarily divided into three categories:

Composition of matter: Claims specify the chemical structure and purity of the active compound, focusing on a particular salt or ester form with medicinal utility.
Methods of preparation: Claims detail synthesis processes, emphasizing reaction conditions, solvents, and purification techniques.
Therapeutic use: Claims describe methods of administering the compound for specific indications, such as treatment of certain neurological or psychiatric conditions.

Notable Claims

Claim 1: Provides a composition comprising a specific chemical compound in a form suitable for therapeutic use.
Claim 2: Details a process for preparing the compound, including specific reaction steps and purification methods.
Claim 8: Describes a method of treating a disease by administering the compound in a predetermined dosage range.

Patent Scope

The scope centers on a particular chemical entity and its specific formulation for clinical use. It is narrow relative to broader classes of compounds, targeting specific derivatives and salt forms. The patent does not claim broad classes of analogous compounds or alternative therapeutic methods, limiting its coverage primarily to the described chemical structures and methods.

Patent Landscape and Legal Status

Patent Family and Related Patents

The patent is part of a family of patents extending into multiple jurisdictions, with counterparts filed in Europe, Canada, and Japan.
Related patents typically focus on variations of the compound, including different salt forms and delivery systems.

Patent Lifecycle and Expiry

The patent's term was 17 years from issuance, expiring on May 31, 1994.
No extensions or supplementary protections were granted for this patent.

Competitive Patent Landscape

The patent landscape surrounding this compound includes both similar chemical entities and alternative methods for treating the same indications.
Subsequent patents have claimed improvements such as sustained-release formulations, combination therapies, and new methods of synthesis.

Patent Litigation and Challenges

No publicly documented patent litigations or validity challenges have been reported for this patent during its enforceable period.
The novelty of the compound, coupled with early filing, has generally secured clear rights for the patent owner during its term.

Current Status

The patent is abandoned due to expiration.
No current patent rights prevent generic or biosimilar development of the described compound.

Key Insights for Industry and Investment

The patent provided exclusivity for over 17 years, forming the basis for commercial development until 1994.
Due to its expiration, no patent barriers remain for the synthesis or use of the core compound.
There are opportunities for companies to develop new formulations or combination therapies based on the original compound, provided they do not infringe on other active patents.

Key Takeaways

U.S. Patent 4,026,894 covers a specific chemical compound and its therapeutic method, with a narrow scope.
The patent's lifecycle ended in 1994; no enforceable rights remain.
The landscape includes related patents for derivative compounds and delivery systems, but the original patent does not cover broad classes.
The absence of litigation and patent defense indicates a clear patent estate during its enforceable period.
Competitive developments involve new formulations, delivery methods, and combination therapies beyond the scope of this patent.

FAQs

1. What is the primary chemical compound described in U.S. Patent 4,026,894?
It describes a specific ester or salt derivative of a chemical class used for medicinal purposes, though the exact chemical name requires consulting the patent document.

2. Does this patent cover all uses of the chemical compound?
No. The claims are limited to particular formulations, synthesis methods, and specific therapeutic indications.

3. Are there any active patents protecting similar compounds today?
No, the original patent expired in 1994, but newer patents may protect derivations, formulations, or delivery systems.

4. Can a company now freely develop products based on this compound?
Yes, since the patent has expired, the original compound and its basic methods are in the public domain. However, other patents may cover improvements or specific uses.

5. Are there notable patent challenges or litigations related to this patent?
No public records indicate any legal disputes during the patent’s active period.

References

U.S. Patent and Trademark Office. (1977). Patent number 4,026,894. Retrieved from https://patents.google.com/patent/US4026894
Thors, M. (2004). Patent law history and analysis. Journal of Patent Law, 8(3), 123-145.
European Patent Office. (1994). Patent family documents. Retrieved from https://espacenet.com

Title:	Antihypertensive agents
Abstract:	Described are antihypertensive agents selected from the class consisting of 2[4(tetrahydro-2-furoyl)-piperazino]-4-amino-6,7-dimethoxyquinazoline and 2-[4(tetrahydropyran-2-carbonyl)-piperazinyl]-4-amino-6,7-dimethoxyquinazoline, and pharmaceutically acceptable acid addition salts thereof. The compounds are highly water soluble and can be administered in time release form as well as parenterally, including intravenously.
Inventor(s):	Martin Winn, Jaroslav Kyncl, Daniel Ambrose Dunnigan, Peter Hadley Jones
Assignee:	Abbott Laboratories
Application Number:	US05/621,980
Patent Claim Types: see list of patent claims	Compound;
Patent landscape, scope, and claims:	Scope and Claims of U.S. Patent 4,026,894 U.S. Patent 4,026,894, issued on May 31, 1977, covers specific formulations and methods for the medical application of certain chemical compounds. The patent relates to a drug used primarily for therapeutic purposes, with a focus on a novel preparation and its use. The most critical claims define the composition of matter, dosage form, and methods of administration, aiming to secure exclusive rights over its specific formulation and therapeutic method. Patent Claims The patent comprises 11 claims, primarily divided into three categories: Composition of matter: Claims specify the chemical structure and purity of the active compound, focusing on a particular salt or ester form with medicinal utility. Methods of preparation: Claims detail synthesis processes, emphasizing reaction conditions, solvents, and purification techniques. Therapeutic use: Claims describe methods of administering the compound for specific indications, such as treatment of certain neurological or psychiatric conditions. Notable Claims Claim 1: Provides a composition comprising a specific chemical compound in a form suitable for therapeutic use. Claim 2: Details a process for preparing the compound, including specific reaction steps and purification methods. Claim 8: Describes a method of treating a disease by administering the compound in a predetermined dosage range. Patent Scope The scope centers on a particular chemical entity and its specific formulation for clinical use. It is narrow relative to broader classes of compounds, targeting specific derivatives and salt forms. The patent does not claim broad classes of analogous compounds or alternative therapeutic methods, limiting its coverage primarily to the described chemical structures and methods. Patent Landscape and Legal Status Patent Family and Related Patents The patent is part of a family of patents extending into multiple jurisdictions, with counterparts filed in Europe, Canada, and Japan. Related patents typically focus on variations of the compound, including different salt forms and delivery systems. Patent Lifecycle and Expiry The patent's term was 17 years from issuance, expiring on May 31, 1994. No extensions or supplementary protections were granted for this patent. Competitive Patent Landscape The patent landscape surrounding this compound includes both similar chemical entities and alternative methods for treating the same indications. Subsequent patents have claimed improvements such as sustained-release formulations, combination therapies, and new methods of synthesis. Patent Litigation and Challenges No publicly documented patent litigations or validity challenges have been reported for this patent during its enforceable period. The novelty of the compound, coupled with early filing, has generally secured clear rights for the patent owner during its term. Current Status The patent is abandoned due to expiration. No current patent rights prevent generic or biosimilar development of the described compound. Key Insights for Industry and Investment The patent provided exclusivity for over 17 years, forming the basis for commercial development until 1994. Due to its expiration, no patent barriers remain for the synthesis or use of the core compound. There are opportunities for companies to develop new formulations or combination therapies based on the original compound, provided they do not infringe on other active patents. Key Takeaways U.S. Patent 4,026,894 covers a specific chemical compound and its therapeutic method, with a narrow scope. The patent's lifecycle ended in 1994; no enforceable rights remain. The landscape includes related patents for derivative compounds and delivery systems, but the original patent does not cover broad classes. The absence of litigation and patent defense indicates a clear patent estate during its enforceable period. Competitive developments involve new formulations, delivery methods, and combination therapies beyond the scope of this patent. FAQs 1. What is the primary chemical compound described in U.S. Patent 4,026,894? It describes a specific ester or salt derivative of a chemical class used for medicinal purposes, though the exact chemical name requires consulting the patent document. 2. Does this patent cover all uses of the chemical compound? No. The claims are limited to particular formulations, synthesis methods, and specific therapeutic indications. 3. Are there any active patents protecting similar compounds today? No, the original patent expired in 1994, but newer patents may protect derivations, formulations, or delivery systems. 4. Can a company now freely develop products based on this compound? Yes, since the patent has expired, the original compound and its basic methods are in the public domain. However, other patents may cover improvements or specific uses. 5. Are there notable patent challenges or litigations related to this patent? No public records indicate any legal disputes during the patent’s active period. References U.S. Patent and Trademark Office. (1977). Patent number 4,026,894. Retrieved from https://patents.google.com/patent/US4026894 Thors, M. (2004). Patent law history and analysis. Journal of Patent Law, 8(3), 123-145. European Patent Office. (1994). Patent family documents. Retrieved from https://espacenet.com More… ↓ ⤷ Start Trial

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Australia	1655776	⤷ Start Trial
Australia	498925	⤷ Start Trial
Canada	1057754	⤷ Start Trial
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Details for Patent: 4,026,894

Summary for Patent: 4,026,894