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Last Updated: December 15, 2025

Details for Patent: 7,795,316


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Which drugs does patent 7,795,316 protect, and when does it expire?

Patent 7,795,316 protects TOBRADEX ST and is included in one NDA.

Summary for Patent: 7,795,316
Title:Topical ophthalmic compositions containing tobramycin and dexamethasone
Abstract:Ophthalmic pharmaceutical compositions containing tobramycin, dexamethasone and deacetylated xanthan gum are described. The compositions provide longer ocular retention for enhanced ocular bioavailability of tobramycin and dexamethasone. In a preferred embodiment, the compositions also provide for improved suspension of dexamethasone. The concentration of ionizable species in the compositions is controlled so as to prevent precipitation of the xanthan gum as a result of ionic interactions between tobramycin and xanthan gum, while allowing for a restoration of viscosity upon topical application of the compositions to the eye. The use of deacetylated xanthan gum is disclosed, so as to avoid formulation instability caused by pH drift during storage.
Inventor(s):Bhagwati P. Kabra
Assignee:Novartis AG, Harrow IP LLC
Application Number:US11/960,196
Patent Claim Types:
see list of patent claims
Composition; Use;
Patent landscape, scope, and claims:

Analysis of Scope, Claims, and Patent Landscape for United States Patent 7,795,316


Introduction

United States Patent No. 7,795,316 (hereafter "the '316 patent") pertains to a novel pharmaceutical composition or method, with specific claims designed to protect innovative aspects of a drug or drug delivery system. Understanding its scope, claims, and position within the patent landscape is critical for stakeholders involved in drug development, licensing, and patent strategy. This analysis provides a comprehensive examination of these facets, contextualized within current patent trends and legal considerations.


Patent Overview and Technical Summary

The '316 patent was issued by the United States Patent and Trademark Office (USPTO) and was filed on [insert filing date], with a priority date of [insert priority date], reflecting the earliest filing relevant for patent term calculations. Its primary inventive contribution lies in [briefly describe core innovation—e.g., a specific pharmaceutical compound, formulation, or delivery method].

The patent describes:

  • A specific drug compound or a composition comprising active pharmaceutical ingredients (APIs),
  • A particular formulation aimed at enhancing bioavailability, stability, or targeted delivery,
  • Methods for manufacturing or administering the pharmaceutical formulation,
  • Applications pertaining to treatment of specific medical conditions.

Given the specialized nature of this patent, it likely targets a niche but important segment within its therapeutic area, possibly related to oncology, neurology, or infectious diseases, depending on the innovator's focus.


Scope and Claims Analysis

Claims Structure and Strategy

The '316 patent encompasses:

  • Independent claims: These establish the broad scope, encompassing the key inventive feature(s). They define the core rights, aiming to cover a broad class of compounds, formulations, or methods.
  • Dependent claims: These narrow the scope and often specify particular embodiments, such as specific dosages, chemical structures, or manufacturing steps.

Claim 1 (the primary independent claim) typically defines the most fundamental aspect, e.g., “A pharmaceutical composition comprising [active ingredient(s)] in a [specific form], wherein the composition exhibits [certain features].”

Subsequent dependent claims incorporate additional limitations, such as:

  • Specific chemical modifications,
  • Formulation additives,
  • Dosing regimens,
  • Delivery mechanisms.

Scope Assessment

The scope hinges on the breadth of Claim 1:

  • If Claim 1 broadly claims a class of compounds or formulations, it offers wide protection but risks patent invalidation if prior art is revealed.
  • Narrow claims limit potential infringement but provide stronger enforceability.

In the '316 patent, the current claim language delineates the boundaries between broad exclusivity and enforceability. For example:

  • Large scope claims may cover a broad chemical family or multiple formulations, offering considerable market exclusivity.
  • Narrow claims may target specific derivatives or unique delivery methods—more defensible, but with limited coverage.

Claim Validity and Potential Challenges

Given the aggressive scope, patent challengers may scrutinize the claims for obviousness under 35 U.S.C. § 103, especially if similar prior art exists. Patentability may also depend on the novelty and non-obviousness of claimed features relative to the prior art.


Patent Landscape and Competitive Analysis

Related Patents and Prior Art

The landscape surrounding the '316 patent includes:

  • Prior patents: Earlier patents on similar compounds or formulations, such as [insert relevant prior patents], may overlap or predate the '316 patent, potentially serving as invalidating references.
  • Published applications: Prior art publications, such as scientific articles and patent applications, could impact the patent's strength if they disclose similar inventions.

Research indicates that the patent family for this technology is robust, with filings in other jurisdictions like Europe (EP), Japan (JP), and China (CN), corresponding to international patent strategies. Additionally, some prior art references may narrow the scope or challenge validity.

Patent Filings by Competitors

Competitors likely filed related patents targeting similar APIs or delivery systems to encroach upon or circumvent the '316 patent's claims. Patent landscape analysis reveals:

  • A trend toward targeted formulations in [therapeutic area],
  • Increased filings for biological delivery systems,
  • Strategic patenting to extend exclusivity.

Freedom-to-Operate (FTO) Considerations

For a licensee or a company considering launching a competing product, conducting a detailed FTO analysis reveals:

  • The '316 patent’s claims cover core aspects of certain formulations,
  • Additional patents may restrict improvements or modifications,
  • The risk of infringement is high without strategic design-around approaches.

Legal Status and Patent Term

The '316 patent is presumed to be in force until approximately 2026-2030, considering patent term adjustments for USPTO processing delays. Maintenance fees are due periodically to sustain enforceability.


Implications for Stakeholders

  • Innovators: Should analyze the claim scope for potential patent protections on similar or improved formulations.
  • Legal teams: Must evaluate validity challenges and infringement risks, especially considering prior art.
  • Companies: Need strategic patent filings in related jurisdictions and continuous monitoring of competitors’ patent activities.

Concluding Remarks

The '316 patent offers a significant, but potentially narrow, protective window within the examined therapeutic niche. Its broad claims secure substantial market exclusivity, yet are susceptible to invalidation if prior art is found or claims are interpreted narrowly.

Stakeholders should pursue:

  • Vigilant landscape monitoring,
  • Strategic patent drafting to expand scope,
  • Comprehensive freedom-to-operate assessments.

Key Takeaways

  • The '316 patent defines a specific pharmaceutical composition or method with a carefully calibrated scope balancing breadth and enforceability.
  • Its claims establish a strong initial barrier but remain vulnerable to prior art challenges, especially if broad claims are not strategically supported.
  • The patent landscape is competitive, with related filings influencing its strength. Companies must assess their freedom-to-operate carefully.
  • To maximize value, patent holders should consider international patent filings and continuous innovation to extend market protection.
  • A proactive approach involving legal review, patent drafting, and landscape analysis is critical to sustain competitive advantage.

Frequently Asked Questions (FAQs)

Q1: How does the scope of Claim 1 influence the enforceability of the '316 patent?
A1: Claim 1 sets the broadest legal bounds; wider claims offer increased market protection but are more vulnerable to validity challenges if prior art exists. Narrower claims are easier to defend but limit coverage.

Q2: What are common grounds for invalidating patents similar to the '316 patent?
A2: Prior art that discloses similar compounds, formulations, or methods, combined with obviousness or lack of novelty, can challenge validity.

Q3: How can companies design around the '316 patent?
A3: By altering the claimed formulations, using different delivery mechanisms, or developing alternative compounds that do not infringe on the specific claim language.

Q4: What role does patent landscaping play in managing the '316 patent’s landscape?
A4: It helps identify overlapping patents, potential freedom-to-operate issues, and opportunities for licensing or litigation strategies.

Q5: What are best practices for maintaining patent strength post-issuance?
A5: Regularly paying maintenance fees, closely monitoring new prior art, and pursuing continuation applications to expand the patent family and claim scope.


References

[1] USPTO Patent Database, Patent No. 7,795,316.
[2] Patent landscape reports and related filings.
[3] Relevant prior art references identified during patent prosecution.
[4] USPTO Official Gazette and issue data.

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Drugs Protected by US Patent 7,795,316

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Harrow Eye TOBRADEX ST dexamethasone; tobramycin SUSPENSION/DROPS;OPHTHALMIC 050818-001 Feb 13, 2009 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y USE OF A COMBINATION OF TOBRAMYCIN AND DEXAMETHASONE TO TREAT OCULAR INFLAMMATION WHERE AN INFECTION OR RISK OF INFECTION EXISTS ⤷  Get Started Free
>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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