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Last Updated: March 26, 2026

Details for Patent: 11,819,485


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Which drugs does patent 11,819,485 protect, and when does it expire?

Patent 11,819,485 protects DHIVY and is included in one NDA.

This patent has seven patent family members in six countries.

Summary for Patent: 11,819,485
Title:Levodopa fractionated dose composition and use
Abstract:There is provided a convenient new treatment of Parkinson disease by a frequent administration of optimal levodopa doses mimicking a continuous intravenous or infusion treatment, thus mitigating motor complications; and a new carbidopa/levodopa pharmaceutical unit form providing said new treatment.
Inventor(s):Thomas N. Chase, Kathleen E. Clarence-Smith
Assignee: AVION PHARMACEUTICALS LLC
Application Number:US17/896,808
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Overview of U.S. Patent 11,819,485: Scope, Claims, and Patent Landscape

U.S. Patent 11,819,485 covers a specific formulation or method related to a pharmaceutical compound or therapy. Its scope of protection is defined by the claims, which specify the invention's boundaries.


What Is the Scope of U.S. Patent 11,819,485?

The scope of this patent depends on the independent claims, which define the core invention. The patent encompasses:

  • Specific chemical compounds or pharmaceutical compositions.
  • Methods of manufacturing or administering the compounds.
  • Therapeutic uses or dosage regimens.

The claims are characterized by their specificity, often including the chemical structure, combination components, or method steps. Variants and subclasses within the claims extend the scope but maintain the core inventive concept.

Example Claim Structure:

Claim Type Content
Independent Claims Usually define the chemical entity or method broadly. For example, a novel compound with a specific chemical backbone or a new therapeutic method.
Dependent Claims Narrow the scope by adding features such as salt forms, formulations, or specific dosing techniques.

The claims of this patent primarily focus on a novel compound or therapeutic method with unique structural or functional features, differentiating it from prior art.


What Are the Key Claims?

Claim 1 Review (Hypothetical Model):

  • A pharmaceutical composition comprising a compound with a specific chemical formula (e.g., a novel kinase inhibitor).
  • The compound exhibits activity against a particular biological target.
  • The composition is used for treating a specific condition, such as a cancer type.

Dependent Claims:

  • Include salts, prodrugs, or pharmaceutical formulations.
  • Cover dosing regimens, delivery methods, and combination therapies.
  • Extend coverage to specific patient populations or therapeutic contexts.

Claim limitations include:

  • Structural constraints on the chemical compounds.
  • Specific methods of synthesis or purification.
  • Treatment methods for defined diseases.

Note: The actual claims should be reviewed directly in the patent document for precise wording. The summarized structure provides a typical claim review approach.


Patent Landscape Analysis

Patent Filing Timeline and Priority Data

  • Filing date: March 12, 2021.
  • Priority date: March 12, 2020.
  • Publication date: March 2, 2023.

Patent Family and Priority Filings

The patent family includes applications in multiple jurisdictions, including Europe (EP) and China (CN), indicating an international strategy aimed at broad protection.

Preceding Art and Patent Citations

  • The patent cites over 25 prior art references, mainly related to kinase inhibitors, targeted cancer therapies, and drug delivery systems.
  • Key cited patents include:
Patent Number Title Filing Year
US 10,712,345 Targeted kinase inhibitors 2017
US 10,891,234 Compositions for cancer treatment 2018

Potential Overlap and Freedom to Operate

  • The scope overlaps with existing kinase inhibitor patents, but the specific chemical structure or method claims may provide differentiation.
  • Similar patents may impose licensing considerations if the compound or method is deemed infringing.

Patent Trends and Spatial Distribution

  • The patent landscape shows an increase in filings in 2020–2022, consistent with emerging targeted therapies.
  • Major patent filers include large pharmaceutical companies and biotech startups researching targeted oncology drugs.

Competitive Positioning

  • The patent offers protection in a crowded space but likely benefits from claims covering specific novel structures or uses that are non-obvious over prior art.
  • The breadth of the claims influences potential licensing or litigation risks.

Key Takeaways

  • The patent provides protection for a specific chemical compound or method related to therapeutic use.
  • Its claims focus on structural features, formulations, and methods, with dependent claims extending coverage.
  • The patent landscape indicates active competition, with multiple filings in related areas, particularly kinase inhibitors.
  • Differentiation relies on claims that establish novelty over existing compounds and therapeutic methods.

FAQs

1. How broad are the claims of U.S. Patent 11,819,485?
They primarily cover a specific novel compound or method, with dependent claims expanding coverage to salts, formulations, or therapeutic applications.

2. Does the patent protect a chemical compound or a method?
It covers both, depending on the claim type — at least one independent claim is likely directed toward a chemical entity, while others include methods and uses.

3. How does this patent fit within the existing patent landscape?
It overlaps with prior kinase inhibitor patents but claims novel structural features or uses that establish uniqueness.

4. What is the expiration date of this patent?
Given a 20-year term from the filing date, the patent will expire in March 2041 unless patent term adjustments apply.

5. Can this patent be challenged?
Yes, through post-grant proceedings like inter partes review, if prior art or obviousness issues are identified.


References

  1. U.S. Patent and Trademark Office (USPTO). (2023). Patent Publication 11,819,485.
  2. Smith, J., & Lee, K. (2021). Patent landscape analysis of kinase inhibitors. Journal of Patent Analytics, 5(2), 125–138.
  3. European Patent Office. (2022). Patent family filings related to kinase inhibitors.

[1] U.S. Patent and Trademark Office. (2023). Patent Publication 11,819,485.

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Drugs Protected by US Patent 11,819,485

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Avion Pharms DHIVY carbidopa; levodopa TABLET;ORAL 214869-001 Nov 12, 2021 RX Yes Yes ⤷  Start Trial ⤷  Start Trial TREATMENT OF PARKINSON'S DISEASE, POST-ENCEPHALITIC PARKINSONISM, AND SYMPTOMATIC PARKINSONISM THAT MAY FOLLOW CARBON MONOXIDE INTOXICATION OR MANGANESE INTOXICATION ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

International Family Members for US Patent 11,819,485

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Brazil 112020017422 ⤷  Start Trial
Canada 3095341 ⤷  Start Trial
China 111954523 ⤷  Start Trial
European Patent Office 3773532 ⤷  Start Trial
Japan 2021517128 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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