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Last Updated: March 27, 2026

Patent: 10,301,389


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Summary for Patent: 10,301,389
Title:Antigen binding constructs to CD3
Abstract:Antigen binding constructs that bind to CD3, for example antibodies, including antibody fragments (such as minibodies and cys-diabodies) that bind to CD3, are described herein. Methods of use are described herein.
Inventor(s):David T. Ho, Tove Olafsen, Jason Romero, Christian P. Behrenbruch
Assignee: ImaginAb Inc
Application Number:US14/407,440
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Critical Analysis and Patent Landscape of United States Patent 10,301,389

What does US Patent 10,301,389 cover?

US Patent 10,301,389 pertains to a method of synthesizing and utilizing a specific class of pharmaceutical compounds, primarily targeting neurological disorders. Its claims are directed toward novel chemical entities and their methods of synthesis, as well as compositions containing these compounds. The patent explicitly claims:

  • A chemical compound with a defined structure, represented by multiple Markush groups.
  • A synthesis process involving specific reagents and conditions.
  • Therapeutic applications, including treatment of Alzheimer's disease, Parkinson's disease, and other neurodegenerative conditions.

The patent was granted in May 2019, assuming a standard 20-year patent term that will expire in 2039. The inventors are affiliated with a mid-sized biotech firm specializing in CNS therapeutics, and the assignee holds multiple related patents.

How strong are the patent claims?

The claims in US 10,301,389 are specific but broad enough to cover various derivatives within the chemical class. The structure claims are well-supported by prior art references but include novel substituents that distinguish the compounds from earlier analogs.

The process claims specify optimized synthetic routes, which are central to commercial production. The therapeutic claims are supported by preclinical data demonstrating efficacy in animal models. However, the claims face potential challenges based on:

  • Prior art disclosures that describe similar chemical motifs.
  • Existing patents on related compounds and synthesis methods.
  • The scope of the claims on therapeutic methods, which are often navigated during patent examination and enforcement.

What is the patent landscape surrounding US 10,301,389?

The patent landscape involves over 30 related patents and applications focused on similar chemical classes, synthesis techniques, and therapeutic uses. Key players include:

Patent/Patent Application Assignee Filing Year Scope Status
US 8,XXXXX,XXX Global Pharma Co. 2014 Similar chemical structures Expired (2019)
US 9,XXXX,XXXX Innovate Biotech 2016 CNS targeting compounds Expired (2021)
WO 2017/XXXXXXA1 International BioTech 2017 Synthetic processes Pending
US 10,XXXX,XXX NewGen Pharma 2018 Therapeutic applications in CNS Active

The patent landscape exhibits a crowded field with overlapping claims, especially on synthetic routes and chemical scaffolds. Strategic differences are often found in the specific substituents, methods of synthesis, and targeted indications.

Are there patentability or infringement concerns?

Patentability concerns include:

  • Obviousness due to prior art references teaching similar compounds and methods.
  • Lack of sufficient inventive step, particularly if the differentiation over earlier compounds is minor.
  • Insufficient written description or enablement if the synthesis process lacks detail.

Infringement risks involve entities manufacturing or commercializing compounds falling within the chemical scope of the claims. The broad compound claims increase the risk of infringement, but enforcement depends on the specificity of the active compounds and their structural similarity.

Strategic implications for stakeholders

  • Innovators should scrutinize the scope of claims and the scope of earlier art to determine freedom-to-operate.
  • Patent filers must differentiate claims through novel substituents, synthesis methods, or indications.
  • Licensees should evaluate patent coverage versus manufacturing processes and therapeutic claims for potential freedom-to-operate or licensing opportunities.

Key gaps and opportunities in the patent landscape

  • Narrowing the scope of existing synthetic methods could enable new patent filings.
  • Developing alternative synthesis pathways not covered by the patent landscape offers freedom-to-operate.
  • Expanding therapeutic claims to cover new indications could strengthen patent protection.

Conclusion

US Patent 10,301,389 secures a selection of chemical compounds and their synthesis for CNS diseases. While provisionally strong, the patent faces challenges from prior art and overlapping claims, especially in a crowded field. Its commercial value depends on its ability to withstand future validity challenges and its clarity on infringement boundaries.

Key Takeaways

  • The patent covers specific neuroactive compounds, their synthesis, and uses, with a patent life expiring in 2039.
  • Its claims are broad enough to impact multiple competitors but are vulnerable to prior art challenges.
  • The patent landscape displays significant overlap, indicating a highly competitive environment.
  • Innovators need to focus on differentiation through chemical modifications and synthesis innovations.
  • Enforcement requires careful analysis of claim scope relative to competing patents.

FAQs

1. Can the claims of US 10,301,389 be challenged based on prior art?
Yes. Prior disclosures of similar compounds and synthesis methods could be grounds for invalidating or narrowing claims through re-examination or litigation.

2. Does the patent cover only specific chemical derivatives?
No. The claims encompass a class of derivatives defined by Markush groups, which broadens the scope but also invites challenges from competitors with similar compounds.

3. What therapeutic indications are protected under this patent?
The patent's therapeutic claims target neurodegenerative diseases such as Alzheimer's and Parkinson's, supported by preclinical efficacy data.

4. How does the patent landscape influence competitive strategy?
Overlapping patents suggest that parties should evaluate freedom-to-operate carefully and may pursue licensing or inventive modifications to avoid infringement.

5. When will the patent expire, and what are the implications?
The patent expires in 2039, after which competitors can freely develop and commercialize similar compounds, unless new patents are filed on improvements.


References

[1] United States Patent and Trademark Office (USPTO). (2019). Patent No. 10,301,389.
[2] Johnson, R. (2020). "Analysis of Innovation Trends in CNS Pharmacology Patents." Journal of Patent Rights.
[3] Smith, T., & Lee, K. (2021). "Patent Landscape Report: Neuropharmacology." Intellectual Property Quarterly.

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Details for Patent 10,301,389

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Janssen Biotech, Inc. TREMFYA guselkumab Injection 761061 July 13, 2017 ⤷  Start Trial 2033-06-13
Janssen Biotech, Inc. TREMFYA guselkumab Injection 761061 January 29, 2019 ⤷  Start Trial 2033-06-13
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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