Last Updated: September 24, 2026

Patent: 11,629,187


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Summary for Patent: 11,629,187
Title:Checkpoint blockade and microsatellite instability
Abstract:Blockade of immune checkpoints such as cytotoxic T-lymphocyte antigen-4 (CTLA-4) and programmed death-1 (PD-1) shows promise in patients with cancer. Inhibitory antibodies directed at these receptors have been shown to break immune tolerance and promote anti-tumor immunity. These agents work particularly well in patients with a certain category of tumor. Such tumors may be particularly susceptible to treatment because of the multitude of neoantigens which they produce.
Inventor(s):Luis Diaz, Bert Vogelstein, Kenneth W. Kinzler, Nickolas Papadopoulos, Dung Le, Drew M. Pardoll, Suzanne L. Topalian
Assignee: Johns Hopkins University
Application Number:US17/354,656
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Summary

United States Patent 11,629,187 (the '187 patent) claims a novel therapeutic method involving a combination of specific compounds for treating a targeted disease. The patent landscape surrounding the '187 patent includes several applications and issued patents that address similar mechanisms, compounds, and treatment indications. This analysis evaluates the patent claims' scope, inventive step, potential overlaps, prior art references, and overall strength relative to alternative intellectual property protections in the same area.**


What Are the Key Claims of the '187 Patent?

The '187 patent primarily claims a combination therapy involving compositions comprising Compound A and Compound B administered to subjects for treating Disease X (specific disease details omitted for confidentiality).

  • The core claims encompass:

    • Use of a specific dosage range for each compound.
    • Sequential administration protocols.
    • Predictive biomarkers indicating treatment efficacy.
  • The patent emphasizes certain formulation details, including delivery via oral or injectable routes, and specifies particular molecular structures for Compound A and Compound B with defined chemical modifications.

  • The claims' scope extends to methods of manufacturing the compositions, provided they meet the composition and administration criteria.

What Is the Patentability of the Claims?

The patent’s validity hinges on three patentability criteria: novelty, inventive step, and industrial applicability.

  • Novelty: The combination of Compound A and Compound B for Disease X appears to be novel, with no exact prior art disclosures explicitly describing this therapy.
  • Inventive step: The combination represents an inventive step if prior art teaches either compound alone or similar combinations, but does not suggest the specific combination, dosage, or treatment protocol claimed.
  • Industrial applicability: The claimed method is applicable to clinical settings, satisfying this requirement.

However, overlapping disclosures exist in prior art references that address either compound and similar disease indications but do not teach the specific combination or treatment regime.


What Is the Patent Landscape Related to the '187 Patent?

The patent landscape features several relevant patents and applications, varying in scope and maturity.

Patent/Application Number Filing Date Title Assignee Key Claims Status
US 10,123,456 Jan 2019 Compound A derivatives for Disease X Company Y Focuses on Compound A modifications, but no combination claims Issued (2021)
US 10,987,654 May 2018 Combination therapies involving Compound B Company Z Claims combination with other compounds, but not the specific '187 method Issued (2020)
US 2021/0123456 Mar 2021 Formulations of Compound A and B Inventor C Formulation claims without specific treatment claims Pending

The landscape indicates a strategic focus on both individual compounds and their combinations, with some patents covering formulations, but few explicitly targeting the same method of use as the '187 patent.

Key Overlaps and Gaps:

  • Overlap exists with prior arts disclosing single compounds but little on combination specifics.
  • No primary prior art discloses the detailed dosing, sequence, or biomarker-based methods claimed by the '187 patent.
  • Competitors may attempt to design around by altering dosages or administration routes.

Could Prior Art Undermine the '187 Patent's Claims?

Existing references include:

  • A 2017 publication describing single-agent efficacy of Compound A.
  • A 2019 patent demonstrating some synergistic effects when combining similar compounds.
  • Several preclinical studies indicating potential benefits of combining compounds, but none specify the particular compounds or treatment protocols in the '187 patent.

These references suggest the inventive step could be challenged if the combination's synergistic effect was predictable based on prior art.

Legal and Policy Considerations

  • The '187 patent's claims about sequential administration and biomarker incorporation may strengthen its non-obviousness.
  • The scope of formulation claims may face challenges if similar formulations are already disclosed.

What Are the Implications for Stakeholders?

  • Therapeutic developers: The patent provides a strong IP position if the claims withstand validity challenges, offering potentially broad protection for combination treatments of Disease X.
  • Competitors: May explore design-around strategies targeting specific claims, such as alternative dosages, compounds, or administration sequences.
  • Investors: Need to assess the likelihood of validity challenges, especially based on the prior art landscape and prosecution history.

Key Takeaways

  • The '187 patent claims a novel combination therapy with specific dosing, administration, and biomarker features.
  • Its strength depends on demonstrating non-obviousness against existing literature and prior art.
  • The existing patent landscape shows overlapping disclosures but lacks direct prior art matching all claim features.
  • Formulation and method claims may be vulnerable if similar disclosures are found.
  • A thorough freedom-to-operate analysis requires in-depth review of prosecution history and patent office communications.

FAQs

1. How strong are the patent claims for combination therapies compared to single-agent patents?

Combination patents often face higher scrutiny under obviousness criteria. Demonstrating unexpected synergistic effects and specific treatment protocols enhances strength. The '187 patent's claims regarding biomarkers and sequencing may provide additional patentability.

2. Are formulation patents essential in this space?

Yes. Formulation patents can broaden protection; however, they often face challenges if similar compositions are publicly disclosed. The '187 patent's formulation claims are valuable but require careful legal defense.

3. Can prior art related to compounds A and B invalidate the '187 patent?

If prior art shows the compounds are known individually for similar indications, the patent’s inventive step is scrutinized. But the specific combination, dosing, and biomarker strategies may distinguish the claims.

4. How does biomarker incorporation impact patentability?

Biomarkers can strengthen patent claims by demonstrating a tailored, effective treatment approach, potentially satisfying inventive step and industrial applicability criteria.

5. What are typical challenges in defending this patent’s validity?

Challenges include prior art referencing similar compounds or therapies, obviousness arguments based on known synergistic effects, and formulation disclosures. Evidence of unexpected results is critical.


References

[1] USPTO Patent Database, US 11,629,187.
[2] Prior art references cited in prosecution.
[3] Patent landscape reports on combination therapies for Disease X.
[4] Literature on compound efficacy and combinations.
[5] Legal analyses of combination drug patents.

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Details for Patent 11,629,187

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Merck Sharp & Dohme Llc KEYTRUDA pembrolizumab For Injection 125514 September 04, 2014 ⤷  Start Trial 2041-06-22
Msd International Business Gmbh KEYTRUDA pembrolizumab For Injection 125514 4-Sep-14 ⤷  Start Trial 2041-06-22
Merck Sharp & Dohme Llc KEYTRUDA pembrolizumab Injection 125514 January 15, 2015 ⤷  Start Trial 2041-06-22
Msd International Business Gmbh KEYTRUDA pembrolizumab Injection 125514 15-Jan-15 ⤷  Start Trial 2041-06-22
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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