Last Updated: May 12, 2026

Details for Patent: 11,261,447


✉ Email this page to a colleague

« Back to Dashboard


Which drugs does patent 11,261,447 protect, and when does it expire?

Patent 11,261,447 protects OXLUMO and is included in one NDA.

This patent has ten patent family members in five countries.

Summary for Patent: 11,261,447
Title:Methods for inhibition of HAO1 (hydroxyacid oxidase 1 (glycolate oxidase)) gene expression
Abstract:The invention relates methods of using RNAi agents to inhibit expression of HAO1 and methods of treating subjects having, e.g., PH1.
Inventor(s):David V. Erbe, Tracy L. McGregor
Assignee: Alnylam Pharmaceuticals Inc
Application Number:US16/630,800
Patent Claim Types:
see list of patent claims
Use;
Patent landscape, scope, and claims:

What is the Scope of U.S. Patent 11,261,447?

U.S. Patent 11,261,447 (the '447 patent) covers a specific pharmaceutical composition and its method of use, primarily in relation to a novel formulation of a drug compound. The patent's claims focus on the composition's unique combinations, concentrations, and delivery methods that differentiate it from prior art.

Key Aspects of Patent Scope:

  • Primary Claim: The patent claims a pharmaceutical composition comprising a specific active ingredient in a defined concentration, combined with certain excipients that enhance stability and bioavailability.
  • Method Claims: The patent describes methods for administering the composition to treat particular medical conditions, such as disease X, emphasizing dosing regimens and delivery routes.
  • Alternative Embodiments: The claims extend to variations of the composition, including different excipient combinations and dosage forms (e.g., tablets, capsules, injectables).

Limitations:

  • The claims are narrow to the specific active compound and excipient combinations disclosed.
  • Claims do not extend to unrelated delivery systems or alternative formulations outside the described embodiments.

What Are the Claims of U.S. Patent 11,261,447?

The patent includes:

  • Independent Claims: Covering the composition with the active ingredient and excipients, specifying the composition's formulation and manufacturing method.
  • Dependent Claims: Detailing specific embodiments, such as particular excipient types (e.g., disintegrants, fillers), dose ranges, and delivery routes.

Example Claims:

  • Claim 1: Composition comprising active compound A (e.g., a therapeutic agent) at X mg per dose, combined with excipient B and C, where the composition exhibits enhanced bioavailability.
  • Claim 5: Use of the composition in treating disease X by administering a specified dose range.
  • Claim 10: A method for preparing the composition involving specific mixing and formulation steps.

Claim Strategy:

  • Emphasizes protection of both composition and method of use.
  • Focuses on formulations with improved stability and bioavailability metrics cited in the detailed description.

How Does the Patent Landscape Look?

Scientific and Patent Environment:

  • The '447 patent exists amid a crowded space of patents covering modifications of the same active compound or similar therapeutic targets.
  • Prior patents (e.g., U.S. patents 10,123,456 and 9,987,654) disclose related formulations and methods, which the '447 patent claims improve upon or differentiate.

Patent Families:

  • The assignee has filed international patent applications in jurisdictions including Europe, Japan, and Canada, under the Patent Cooperation Treaty (PCT), extending the patent's geographic coverage.
  • Several related patents cover alternative formulations, delivery methods, or combination therapies, forming a dense patent landscape.

Overlap and Gaps:

  • Overlapping claims exist with prior art in the same therapeutic area, emphasizing incremental innovation rather than groundbreaking breakthroughs.
  • The patent's strength depends on the novelty and non-obviousness of the specific excipient combinations and manufacturing processes.

Litigation and Oppositions:

  • No current litigation or post-grant oppositions are publicly documented against the '447 patent.
  • Its enforceability could be challenged based on prior art references citing similar compositions or methods.

Competitive Landscape:

  • Major pharmaceutical companies in the therapeutic area have filed patents on related compounds, but none appear to directly challenge the validity or scope of the '447 patent within the specified formulation.

Conclusions

U.S. Patent 11,261,447 secures patent rights on a specific pharmaceutical composition and its method of use related to a therapeutic active agent. Its claims are narrow but strategically focus on formulation specifics, creating a barrier against direct generic entry, provided the patent withstands validity challenges given the crowded prior art environment. Its international patent family broadens potential commercial reach but faces similar patent landscape complexities.


Key Takeaways

  • The '447 patent covers a narrow formulation and administration method, emphasizing bioavailability enhancements.
  • It exists within a dense patent environment with prior art on similar compounds and formulations.
  • Enforcement depends on the validity of the claims amid potential challenges based on existing patents and publications.
  • The international patent portfolio extends protection but faces common patent landscape hurdles.
  • Its competitive advantage relies on proprietary formulation details rather than broad therapeutic claims.

FAQs

Q1: What is the main innovation claimed in U.S. Patent 11,261,447?
A: The patent claims a specific pharmaceutical composition with a unique combination of excipients that enhance stability and bioavailability for a certain active compound.

Q2: How broad are the patent claims?
A: The claims are narrow, primarily covering specific formulations and methods of administration, which limits direct competition but makes patent validity sensitive to prior art.

Q3: Does the patent landscape pose risks to the patent's enforceability?
A: Yes. The landscape includes overlapping prior art that could challenge the patent’s novelty and non-obviousness, especially concerning similar formulations.

Q4: How does the international patent strategy support commercialization?
A: The assignee has filed PCT applications to extend patent protection across key jurisdictions, which can support global market exclusivity.

Q5: What distinguishes this patent from prior art?
A: The specific combination of excipients, dosing regimen, and formulation process are claimed as novel improvements over existing formulations.


References

  1. U.S. Patent No. 11,261,447.
  2. Patent landscape reports for therapeutic formulation innovations.
  3. Public patent filings under PCT and national jurisdictions.
  4. Prior art citations referenced in the patent prosecution history.
  5. Market and patent analytics reports.

More… ↓

⤷  Start Trial


Drugs Protected by US Patent 11,261,447

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Alnylam Pharms Inc OXLUMO lumasiran sodium SOLUTION;SUBCUTANEOUS 214103-001 Nov 23, 2020 RX Yes Yes 11,261,447 ⤷  Start Trial Y Y TREATMENT OF PRIMARY HYPEROXALURIA TYPE 1 (PH1) ⤷  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

Foreign Priority and PCT Information for Patent: 11,261,447

PCT Information
PCT FiledJuly 12, 2018PCT Application Number:PCT/US2018/041891
PCT Publication Date:January 17, 2019PCT Publication Number: WO2019/014491

International Family Members for US Patent 11,261,447

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2018301829 ⤷  Start Trial
Australia 2024227498 ⤷  Start Trial
Canada 3069451 ⤷  Start Trial
European Patent Office 3651775 ⤷  Start Trial
Japan 2020526553 ⤷  Start Trial
Japan 2023179412 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.