United States Patent 4,018,929: A Detailed Analysis of Scope, Claims, and Patent Landscape
Introduction
The United States Patent 4,018,929, titled "3-LOWERALKYLCARBAMYLSULFONAMIDO-4-PHENYLAMINOPYRIDINE-N-OXIDES, DERIVATIVES THEREOF AND PHARMACEUTICAL COMPOSITIONS," is a patent that delves into the realm of pharmaceutical chemistry, particularly focusing on the synthesis and application of specific pyridine-n-oxide derivatives. This analysis will explore the scope, claims, and the broader patent landscape surrounding this invention.
Background of the Invention
The patent, filed and granted in the late 20th century, addresses the need for new pharmaceutical compounds with potential therapeutic applications. The background section typically outlines the existing state of the art and the gaps that the invention aims to fill. In this case, the inventors were seeking to develop compounds that could be used in various medical treatments, leveraging the chemical properties of pyridine-n-oxides.
Summary of the Invention
The patent describes the synthesis and properties of 3-loweralkylcarbamylsulfonamido-4-phenylaminopyridine-n-oxides and their derivatives. These compounds are designed to have specific pharmacological activities, making them candidates for pharmaceutical use. The summary highlights the key aspects of the invention, including the chemical structures, synthesis methods, and potential therapeutic applications.
Detailed Description of the Invention
Chemical Structures and Synthesis
The patent provides a detailed description of the chemical structures of the compounds, including the general formula and specific examples. It outlines the synthesis methods, reagents, and conditions necessary to produce these compounds. This section is crucial for understanding how the inventors achieved the desired chemical properties and for replicating the synthesis process[5].
Pharmaceutical Compositions
The invention also covers pharmaceutical compositions that include these compounds. The patent specifies the formulations, including the active ingredients, carriers, vehicles, and diluents used. This information is vital for developing drugs that are safe and effective for human use.
Claims
Independent Claims
The patent includes eight claims, which define the scope of the invention. Independent claims typically outline the broadest aspects of the invention, while dependent claims narrow down the scope. For example, Claim 1 might describe the general class of compounds, while subsequent claims might specify particular derivatives or pharmaceutical compositions.
Dependent Claims
Dependent claims build upon the independent claims, providing additional details or limitations. These claims help to define the specific embodiments of the invention, such as particular synthesis methods or formulations.
Patent Scope
The scope of the patent is determined by the claims, which define what is protected by the patent. In this case, the scope includes:
- The specific chemical structures of the pyridine-n-oxide derivatives.
- The methods for synthesizing these compounds.
- The pharmaceutical compositions containing these compounds.
Metrics for Measuring Patent Scope
Research on patent scope often uses metrics such as independent claim length and independent claim count to assess the breadth of a patent. A patent with broader claims may cover a wider range of inventions but could face challenges during the examination process due to potential overlaps with existing patents or lack of clarity[3].
Patent Landscape
Related Patents and Prior Art
The patent landscape surrounding US 4,018,929 includes other patents related to pharmaceutical chemistry, particularly those dealing with pyridine derivatives and similar therapeutic agents. Prior art references cited in the patent help to establish the novelty and non-obviousness of the invention.
Competing Inventions
Other patents in the same field may offer competing solutions or similar compounds. For instance, patents like those described in the European Patent Office documents might cover related chemical structures or synthesis methods, highlighting the competitive nature of pharmaceutical research[2].
Impact and Applications
The compounds and pharmaceutical compositions described in this patent have potential therapeutic applications. The invention could contribute to the development of new drugs for various medical conditions, depending on the pharmacological activities of the compounds.
Challenges and Limitations
The patent process involves several challenges, including the need to demonstrate novelty, non-obviousness, and utility. The examination process can narrow the scope of patent claims to ensure they are clear and distinct from prior art. This patent, like others, would have undergone such scrutiny to ensure its validity[3].
Conclusion
United States Patent 4,018,929 is a significant contribution to the field of pharmaceutical chemistry, particularly in the synthesis and application of pyridine-n-oxide derivatives. The detailed description of the chemical structures, synthesis methods, and pharmaceutical compositions provides a comprehensive understanding of the invention. The patent's scope, defined by its claims, protects the specific embodiments of the invention, while the broader patent landscape highlights the competitive and evolving nature of pharmaceutical research.
Key Takeaways
- Chemical Structures: The patent describes specific pyridine-n-oxide derivatives and their derivatives.
- Synthesis Methods: Detailed synthesis methods are provided for replicating the compounds.
- Pharmaceutical Compositions: The patent covers formulations including the active ingredients and carriers.
- Patent Scope: Defined by eight claims that outline the protected aspects of the invention.
- Patent Landscape: Part of a broader landscape of pharmaceutical patents, with potential competing inventions.
FAQs
What is the main subject of United States Patent 4,018,929?
The main subject is the synthesis and pharmaceutical applications of 3-loweralkylcarbamylsulfonamido-4-phenylaminopyridine-n-oxides and their derivatives.
How many claims are included in the patent?
The patent includes eight claims.
What metrics can be used to measure the scope of a patent?
Metrics such as independent claim length and independent claim count can be used to assess the breadth of a patent.
What is the significance of the patent landscape in this context?
The patent landscape helps in understanding the competitive environment and related inventions in the field of pharmaceutical chemistry.
What are some potential challenges in the patent process for this invention?
Challenges include demonstrating novelty, non-obviousness, and utility, as well as potential narrowing of claims during the examination process.
Cited Sources:
- Patent 2327575 Summary - Not directly relevant but provides context on pharmaceutical patents.
- 2,2-(BIS-PHENYL)-PROPAN-1-AMINE DERIVATIVES AS CETP - Provides context on related pharmaceutical compounds.
- Patent Claims and Patent Scope - Discusses metrics for measuring patent scope.
- United States Patent US009227956B2 - Not directly relevant but provides context on pharmaceutical patent applications.
- United States Patent to - The specific patent document for US 4,018,929.
