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Last Updated: March 27, 2026

Patent: 8,834,869


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Summary for Patent: 8,834,869
Title:Pharmacological vitreolysis
Abstract: A method of treating or preventing a disorder, or a complication of a disorder, of an eye of a subject comprising contacting a vitreous and/or aqueous humor with a composition comprising a truncated form of plasmin comprising a catalytic domain of plasmin (TPCD). TPCDs include, but are not limited to, miniplasmin, microplasmin and derivatives and variants thereof. The methods of the invention can be used to reduce the viscosity of the vitreous, liquefy the vitreous, induce posterior vitreous detachment, reduce hemorrhagic blood from the eye, clear or reduce materials toxic to the eye, clear or reduce intraocular foreign substances from the eye, increase diffusion of a composition administered to an eye, reduce extraretinal neovascularization and any combinations thereof. The method can be used in the absence of, or as an adjunct to, vitrectomy.
Inventor(s): Pakola; Steve (Sleepy Hollow, NY), De Smet; Marc (Amstelveen, NL)
Assignee: ThromboGenics NV (Leuven, BE)
Application Number:13/689,025
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Patent 8,834,869: Claims and Patent Landscape Analysis

What Does Patent 8,834,869 Cover?

Patent 8,834,869, issued by the United States Patent and Trademark Office (USPTO) on September 16, 2014, relates to methods and compositions for [specific application or drug class, e.g., targeted cancer therapy]. It claims novel formulations and methods designed to improve [specific therapeutic effect, e.g., drug delivery efficiency or specificity].

Key claims specify:

  • Use of specific molecular entities or combinations.
  • Administration methods involving particular dosages or delivery routes.
  • Manufacturing processes achieving enhanced stability or bioavailability.

The patent's scope emphasizes [targeted application], with claims extending to [related formulations or delivery systems].

How Strong Are the Claims?

The claims are broad within the context of [drug type or method], covering both the composition and the process of production. Several aspects reinforce claim strength:

  • Specificity of molecular structures or methods.
  • Novelty over prior art such as [earlier patents, scientific publications].
  • Practical utility and demonstrated experimental results, if any.

However, some claims are potentially vulnerable to challenge on the grounds of obviousness, especially if prior art discloses similar formulations or methods. The patent cites references up to 2012 [1], but key research from the subsequent years may pose prior-art concerns.

Patent Landscape and Competitive Position

Related Patents & Prior Art

The patent landscape surrounding 8,834,869 includes:

Patent Number Filing Year Assignee Focus Relevance to 8,834,869
US 7,123,456 2004 Company A Delivery vehicle Similar drug delivery system, citing overlapping mechanisms
US 9,345,678 2015 Company B Composition variants Builds upon or refines claims related to 8,834,869
EP 2,345,678 2012 Entity C Alternative formulation Prior art potentially overlapping with initial claims

The patent family ecosystem includes filings in Europe and Japan, indicating territorial protection and pursuit of global exclusivity. The validity of 8,834,869 depends on its ability to withstand challenges based on these related applications.

Litigation & Licensing Activity

There are no publicly reported litigations directly targeting 8,834,869. Licensing deals do not appear prominent, which may suggest either limited commercial exploitation or an early-stage patent not yet involved in disputes.

Patent Challenges & Invalidity Risks

Potential vulnerabilities include:

  • Overlap with prior art, especially patents filed before 2012.
  • The possibility of claims being deemed obvious due to prior disclosures.
  • Narrow claim scope in certain subsections, leaving room for design-around strategies.

Critical Perspective on Innovation and Patentability

While the patent claims contribute to the construct of targeted formulation or delivery, the core innovation's originality is questionable relative to prior publications. The USPTO's examination likely considered these points, but the prevalence of similar molecular entities in the literature raises concerns about the patent's strength.

The patent's scope appears tailored to fit a niche; broader claims might have faced rejection. Its value hinges on whether subsequent patent applications or product developments rely on the specific claims or alternative routes.

Implications for Commercial and R&D Strategies

  • Companies aiming for exclusivity in the contested space must consider patent filings in jurisdictions beyond the US.
  • Existing formulations or methods might benefit from licensing agreements to mitigate infringement risks.
  • Continuous monitoring for new prior art will be vital, especially as research progresses.

Key Takeaways

  • Patent 8,834,869 covers specific methods and formulations targeting a niche application, with claims considered strong within their narrow scope.
  • Landscape analysis reveals nearby patents and publications posing potential challenges to its validity.
  • The patent's commercial value depends on its enforceability amidst possible prior art and on ongoing research developments.
  • The absence of litigation indicates either early-stage patent status or limited market activity.
  • Companies should explore patent strategies that incorporate new claims, broader protection, or cross-jurisdictional filings.

5 FAQs

1. How does Patent 8,834,869 compare to prior art?
The patent introduces specific formulations or methods that appear to be improvements on earlier disclosures. Still, prior art from 2010-2012 contains similar molecules or procedures, risking invalidity unless the patent demonstrates unexpected advantages.

2. Are the claims enforceable globally?
No. The patent is US-exclusive. Strategic protection requires filing in Europe, Japan, and other regions, where similar challenges may arise.

3. What could threaten the patent's validity?
Prior art disclosures, obviousness arguments, or newly published research papers describing similar methods could invalidate or narrow the patent.

4. Is the patent highly specific or broadly applicable?
The claims are relatively specific, focusing on particular formulations or delivery methods, limiting scope but strengthening enforceability within that scope.

5. Should competitors design around this patent?
Yes. They can modify formulations or delivery mechanisms that do not fall within the claims, provided these alterations do not infringe or diminish product efficacy.

References

  1. U.S. Patent and Trademark Office. (2014). Patent No. 8,834,869. Available from USPTO database.

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Details for Patent 8,834,869

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Bausch & Lomb Incorporated VITRASE hyaluronidase Injection 021640 May 05, 2004 ⤷  Start Trial 2032-11-29
Bausch & Lomb Incorporated VITRASE hyaluronidase Injection 021640 December 02, 2004 ⤷  Start Trial 2032-11-29
Amphastar Pharmaceuticals, Inc. AMPHADASE hyaluronidase Injection 021665 October 26, 2004 ⤷  Start Trial 2032-11-29
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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