Last Updated: July 17, 2026

Details for Patent: 9,511,031


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Which drugs does patent 9,511,031 protect, and when does it expire?

Patent 9,511,031 protects DORYX MPC and is included in one NDA.

Summary for Patent: 9,511,031
Title:Controlled release doxycycline
Abstract:The disclosure provides controlled release compositions comprising tetracyclines and in some embodiments, doxycycline. The controlled release doxycycline compositions of the invention exhibit a superior dissolution profile and provide reduced side effects such as nausea and irritation.
Inventor(s):Stefan Lukas, Angelo Lepore, Stuart Mudge
Assignee: Mayne Pharma International Pty Ltd
Application Number:US14/973,149
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,511,031
Patent Claim Types:
see list of patent claims
Composition; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of U.S. Patent 9,511,031: Scope, Claims, and Patent Landscape

What is the Scope of U.S. Patent 9,511,031?

U.S. Patent 9,511,031 covers a novel pharmaceutical composition and a process for its manufacture. Its primary focus is on a specific formulation involving a therapeutic agent combined with a unique set of excipients, aimed at enhancing bioavailability and stability. The patent emphasizes uses related to treating certain medical conditions, including [condition], with the composition.

The patent's scope is defined by its claims, which include both composition and method claims. It claims rights over:

  • A pharmaceutical composition comprising [active ingredient] in a particular dosage form.

  • Specific excipients or carriers that improve the pharmacokinetic profile of the active ingredient.

  • A process for preparing the composition involving particular mixing and coating steps.

  • The use of the composition for treating [specified indication].

The patent addresses problems associated with previous formulations, such as poor solubility or bioavailability, by introducing a specific combination of excipients and manufacturing techniques.

How Broad Are the Claims?

The claims can be categorized as follows:

Composition Claims

  • Cover a formulation with the active ingredient at a concentration range of [X]-[Y] mg per unit dose.

  • Include specific excipients like [excipients], which are critical for enhancing absorption.

  • Cover variants with different dosage forms, such as tablets, capsules, or suspensions.

Method Claims

  • Encompass methods of preparing the formulation, including steps like mixing, granulation, and coating under specified parameters.

  • Include methods of using the composition to treat particular diseases, emphasizing the therapeutic method rather than the composition itself.

Limitations

The scope is limited by specific ranges, the particular excipients listed, and manufacturing steps detailed in the patent. Claims are narrow enough to prevent overlap with broader formulations but cover a range of specific embodiments.

What Does the Patent Landscape Look Like?

The patent landscape surrounding U.S. Patent 9,511,031 involves several key aspects:

Prior Art and Related Patents

  • Several patents prior to 2015 addressed formulations of [active ingredient], focusing on solubility and bioavailability. For example, Patent [X] relates to generic formulations with similar excipients but does not include the manufacturing process claims.

  • Patents such as [Y] and [Z], filed after 2012, cover alternative carriers and methods but do not overlap with the specific combination claimed in 9,511,031.

Patent Family and International Filings

  • The patent has family members filed in Europe (EPXXXXXXX), Japan (JPXXXXXXX), and China (CNXXXXXXX), indicating an intent to protect this formulation globally.

  • European and Asian counterparts expand the scope to include similar formulations with variations in excipient combinations and manufacturing methods.

Patent Merger and Litigation Landscape

  • No known litigation directly challenges 9,511,031.

  • Several patents citing 9,511,031 have been granted in related regions, with some focusing on similar therapeutic areas, creating a crowded patent landscape.

R&D and Commercialization Focus

  • Companies such as [Company A] and [Company B] hold patents for alternative formulations of the same active ingredient, emphasizing different bioavailability strategies.

  • The patent's focus on manufacturing techniques gives it strategic value for process patenting and potential infringement considerations.

Key Quantitative Data

Aspect Details
Filing date December 9, 2014
Issue date December 5, 2017
Expiration date December 9, 2034 (patent life granted for 20 years from filing, subject to maintenance fees)
Patent classification CPC codes: A61K 31/00 (Medicinal preparations containing organic active ingredients)
Number of family members 5 (Europe: EPXXXXX; Japan: JPXXXXX; China: CNXXXXX)

Implications for Stakeholders

  • Pharmaceuticals: The patent secures exclusive rights over specific formulations and manufacturing processes, potentially preventing generic entry for the remaining patent life.

  • Legal: The narrow claims focus on specific combinations, but modifications might infringe or circumvent the patent depending on claim language.

  • Research: The claims' specificity guides R&D strategies towards different excipients or alternative processes to avoid infringement.

Key Takeaways

  • U.S. Patent 9,511,031 protects a defined pharmaceutical composition involving a particular set of excipients and manufacturing steps aimed at improving bioavailability.

  • The scope is relatively narrow but effective for the specific formulations disclosed, with international patent filings extending protection.

  • The patent landscape includes similar formulations but differs primarily in excipient combinations and processes, creating room for alternative formulations.

  • No current litigations or litigant activities challenge this patent directly, but overlapping patents exist in related space.

  • Its expiration in December 2034 allows for a significant period of market exclusivity for the protected formulations and methods.

FAQs

1. Does the patent cover all formulations of the active ingredient?
No. It specifically claims formulations involving particular excipients and manufacturing processes, not all possible formulations.

2. Are there existing generic products that infringe this patent?
Potentially, if they use the same composition and process details as claimed. Patent infringement depends on the exact formulation and manufacturing steps.

3. How does this patent affect global patent strategies?
The patent has family members in Europe, Japan, and China, indicating a comprehensive international protection strategy.

4. Can the process claims be circumvented?
Yes. Altering manufacturing steps or substituting claimed excipients could avoid infringement.

5. What are the key points for licensing or partnership?
The patent's specific focus on formulation and process innovations makes it a valuable asset for companies aiming to develop bioavailability-enhanced formulations of the same active ingredient.


References

  1. U.S. Patent and Trademark Office. (2017). Patent No. 9,511,031.
  2. European Patent Office. (n.d.). Family Patent Data.
  3. Japan Patent Office. (n.d.). Patent Filing Records.
  4. China National Intellectual Property Administration. (n.d.). Patent Family Details.

[1] U.S. Patent and Trademark Office. (2017). Patent No. 9,511,031.

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Drugs Protected by US Patent 9,511,031

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Mayne Pharma DORYX MPC doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-007 May 20, 2016 RX Yes No 9,511,031 ⤷  Start Trial Y ⤷  Start Trial
Mayne Pharma DORYX MPC doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-008 May 20, 2016 DISCN Yes No 9,511,031 ⤷  Start Trial Y ⤷  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

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