United States Patent 3,632,645: A Detailed Analysis of Scope and Claims
Overview of the Patent
United States Patent 3,632,645, titled "Substituted phenylacetyl derivatives of guanidine," was granted on January 4, 1972. This patent is associated with the invention of specific acetyl-guanidine derivatives, which are described in detail within the patent documentation.
Inventors and Assignees
The patent was filed by the inventors who developed these specific chemical compounds, although the specific names of the inventors are not provided in the publicly available summary. The assignee of the patent is not explicitly mentioned in the sources, but it is typical for such patents to be assigned to the company or institution that sponsored the research.
Claims of the Patent
Independent Claims
The patent includes several claims that define the scope of the invention. Here are the key aspects of the claims:
- Chemical Structure: The patent claims involve acetyl-guanidine derivatives with specific substitutions. For example, the formula includes R1 being a chlorine atom or a methyl radical[4].
- Synthesis and Composition: The claims detail the methods of synthesizing these compounds and their chemical compositions.
Dependent Claims
Dependent claims further specify the invention by detailing various aspects such as:
- Specific Substitutions: Different substituents on the phenyl ring and the guanidine moiety.
- Pharmaceutical Applications: Potential uses of these compounds, although this is not explicitly stated in the sources provided.
Scope of the Patent
Chemical Scope
The scope of the patent is limited to the specific acetyl-guanidine derivatives described. This includes variations in the substituents on the phenyl ring and the guanidine part of the molecule. The patent does not cover broader classes of compounds but is narrowly focused on these specific derivatives[4].
Pharmaceutical Scope
While the patent does not explicitly mention pharmaceutical applications, compounds of this nature are often investigated for their potential therapeutic uses. The scope in this context would be limited to any medical or biological applications that these specific compounds might have.
Patent Landscape
Prior Art
The patent cites several prior art references related to guanidine compounds and their derivatives. These references are crucial in establishing the novelty and non-obviousness of the invention[4].
Related Patents
Other patents related to guanidine derivatives and similar chemical compounds can be found in various jurisdictions. For instance, patents like US3632645A have counterparts in other countries such as AT293421B, BE721328A, and others, indicating a global interest in these chemical compounds[4].
Expiration and Current Status
The patent has expired, as indicated by its legal status. The expiration date would have been 17 years from the grant date or earlier if the patent term was adjusted due to regulatory reviews or other factors[2][4].
Impact on Innovation and Patent Quality
Patent Quality Metrics
The quality of this patent can be evaluated using metrics such as independent claim length and independent claim count, as discussed in the Hoover Institution paper. Narrower claims, like those in this patent, are often associated with a higher probability of grant and shorter examination processes[3].
Litigation and Licensing
The specificity of the claims in this patent reduces the likelihood of litigation and licensing issues that are common with broader or unclear claims. This specificity helps in maintaining clarity and validity, which are crucial for innovation[3].
Key Takeaways
- Specificity of Claims: The patent is narrowly focused on specific acetyl-guanidine derivatives.
- Chemical Scope: The scope is limited to the described chemical structures and their synthesis.
- Pharmaceutical Potential: While not explicitly stated, these compounds could have potential therapeutic applications.
- Patent Status: The patent has expired.
- Impact on Innovation: The specificity of the claims contributes to higher patent quality and reduced litigation risks.
FAQs
Q: What are the main compounds described in US Patent 3,632,645?
A: The patent describes acetyl-guanidine derivatives with specific substitutions, including chlorine atoms or methyl radicals.
Q: What is the current status of US Patent 3,632,645?
A: The patent has expired.
Q: How does the specificity of claims in this patent impact innovation?
A: The specificity reduces the likelihood of litigation and licensing issues, contributing to higher patent quality and clearer boundaries for innovation.
Q: Are there related patents in other jurisdictions?
A: Yes, there are related patents in various countries such as Austria, Belgium, and others.
Q: What metrics can be used to evaluate the quality of this patent?
A: Metrics such as independent claim length and independent claim count can be used to evaluate the quality of this patent.
Sources
- US Patent and Trademark Office: US3632645A - Substituted phenylacetyl derivatives of guanidine.
- United States Patent and Trademark Office: Extension Under 35 U.S.C. 156(e)(1).
- Hoover Institution: Patent Claims and Patent Scope.
- Google Patents: US3632645A - Substituted phenylacetyl derivatives of guanidine.
