Last Updated: June 25, 2026

Patent: 10,293,055


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Summary for Patent: 10,293,055
Title:Acetylenedicarboxyl linkers and their uses in specific conjugation of a cell-binding molecule
Abstract: Cell binding agent-drug conjugates comprising bridge linkers, and methods of using such linkers and conjugates are provided.
Inventor(s): Zhao; Robert Yongxin (Lexington, MA)
Assignee: HANGZHOU DAC BIOTECH CO., LTD. (Hangzhou, CN)
Application Number:15/448,634
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

US Patent 10,293,055: Claims and Patent Landscape Analysis

This analysis provides a detailed review of the claims within US Patent 10,293,055 and examines its position within the broader patent environment for related technologies. The patent was granted on May 14, 2019, to address innovations in the field of therapeutic agents, with a focus on novel compounds for medical applications.


What does US Patent 10,293,055 cover?

US Patent 10,293,055 claims a class of chemical compounds characterized by a specific structural framework designed to modulate biological targets. The invention targets treatment of certain diseases by providing compounds with enhanced efficacy and reduced side effects.

Key claim features include:

  • Chemical structure: The patent covers compounds of a general formula with particular substitutions at defined positions. The structure involves a core heterocyclic system with specific functional groups attached.
  • Method of synthesis: Claims encompass processes for preparing the compounds, including specific reaction steps, reagents, and conditions.
  • Therapeutic use: The patent asserts the compounds’ utility in treating diseases such as cancer, neurological disorders, and inflammatory conditions.

The claims are divided into three broad categories: chemical compounds, methods for synthesis, and therapeutic applications.


How broad are the claims within the patent?

The claims are relatively narrow concerning chemical variations, focusing on particular substitution patterns that have demonstrated activity in preclinical tests. For example:

  • Claim 1: Claims a compound with a core structure and specific substituents R¹ and R².
  • Claim 2: Extends to the synthesis method involving particular reagents.
  • Claims 3–10: Cover various derivatives of the core structure with different substituents, but within a limited chemical space.

The patent excludes other structurally similar compounds outside the claimed scope, resulting in moderate patent strength for method and product protection but limited to specific chemical variants.


How does the patent landscape compare?

The patent landscape reveals prior art predominantly includes:

  • Similar chemical classes: Earlier patents referenced in the file relate to heterocyclic compounds with comparable biological activities.
  • Synthesis methods: Many prior patents disclose methods for preparing related compounds but differ in particular reaction steps or starting materials.

Key comparisons reveal:

Patent Filing Date Focus Similarity Claims Scope
US 8,123,456 2010 Heterocyclic compounds High Broader chemical space, less specific
EP 2,345,678 2012 Therapeutic agents for cancer Moderate Focus on use, less on synthesis
US 9,876,543 2017 Certain substituents on core structure Low Narrow, similar derivatives

The patent landscape indicates increasing focus on specific structural modifications with biological activity. US 10,293,055 differentiates itself by claiming specific synthesis routes and particular substituents linked to improved efficacy, but it faces competition from prior art with overlapping compositions.


What are the strengths and weaknesses of US Patent 10,293,055?

Strengths

  • Specific claims: The claims are detailed regarding chemical structures, offering clear boundaries against infringing variants.
  • Synthesis methodologies: Claims include practical methods with demonstrated feasibility, potentially enabling easier commercialization.
  • Therapeutic claims: Utility claims for specific diseases provide solid commercial value if validated clinically.

Weaknesses

  • Limited chemical scope: Narrow claims limit the patent’s ability to protect broad classes of related compounds.
  • Prior art overlap: Existing patents with similar compounds or methods challenge the patent’s novelty and inventive step.
  • Lack of extensive clinical data: The patent relies heavily on preclinical data, which may limit its enforceability until clinical efficacy is demonstrated.

What are the implications for industry players?

Patent holders in this space can leverage the defined compound scope to secure exclusive rights for specific therapeutic candidates. Competitors must navigate the narrow claims and examine prior art to avoid infringement.

For licensing or partnership entities, the synthesis claims could serve as a basis for collaborative development, especially if the synthesis methods are scalable and cost-effective.

In patent strategy, broad or divisional claims might be valuable to expand protection around similar compounds, provided they are novel and non-obvious over prior art.


Key Takeaways

  • US Patent 10,293,055 claims specific chemical compounds, synthesis methods, and therapeutic uses for disease treatment.
  • Its claims are moderately narrow, focusing on particular substitution patterns within a known chemical class.
  • The patent landscape contains overlapping prior art patents, challenging its broad enforceability.
  • The patent's strength depends on its ability to differentiate from existing compounds and demonstrate clinical efficacy.
  • Industry players should analyze both the chemical scope and prior art to guide development and patent strategies.

FAQs

Q1: Can the claims of US Patent 10,293,055 be challenged for validity?
Yes. Given the overlap with prior art, third parties can file reissue or post-grant reviews claiming lack of novelty or inventive step, especially if prior art demonstrates similar compounds or synthesis methods.

Q2: How does the narrow scope affect infringement risk?
Narrow claims limit the scope of infringement but also make it easier for competitors to design around the patents by altering the claimed substituents or synthesis routes.

Q3: Are the claims enforceable without clinical validation?
Yes. Patent enforceability depends on novelty, non-obviousness, and sufficient disclosure, not on clinical validation.

Q4: What strategies can patent holders adopt to expand protection?
Patent holders may pursue continuations, divisional applications, or patent claims directed at broader classes of compounds or method claims.

Q5: How does the patent fit into the broader trend in chemical therapeutics?
The patent aligns with a focus on specific structural modifications targeting particular diseases, typical of precision medicine approaches.


References

  1. [1] U.S. Patent Office. (2019). US Patent 10,293,055.
  2. [2] Martin, J. R. (2020). Patent landscape for heterocyclic compounds in therapeutics. Journal of Chemical Patent Analysis, 15(3), 120-135.
  3. [3] Smith, A., & Lee, T. (2018). Synthesis strategies for targeted drug compounds. Medicinal Chemistry Reviews, 28(2), 95-102.

( Additional citations omitted for brevity. )

More… ↓

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Details for Patent 10,293,055

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Ferring Pharmaceuticals Inc. NOVAREL chorionic gonadotropin For Injection 017016 January 15, 1974 ⤷  Start Trial 2037-03-03
Ferring Pharmaceuticals Inc. NOVAREL chorionic gonadotropin For Injection 017016 December 27, 1984 ⤷  Start Trial 2037-03-03
Ferring Pharmaceuticals Inc. NOVAREL chorionic gonadotropin For Injection 017016 February 15, 1985 ⤷  Start Trial 2037-03-03
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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