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Last Updated: December 28, 2025

Patent: 11,529,398


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Summary for Patent: 11,529,398
Title:Use of botulinum neurotoxin in the treatment of sialorrhea
Abstract:This invention relates to improved uses of botulinum neurotoxins in the treatment of sialorrhea or diseases or conditions relating to increased saliva production. In particular are botulinum neurotoxins disclosed which are administered into parotid and submandibular glands in a dose ratio between 1.45 to 1 and 1.7 to 1.
Inventor(s):Janos Csikos, Irena Pulte, Michael Althaus, Markus KRUEER, Nico WEGENER
Assignee: Merz Pharma GmbH and Co KGaA
Application Number:US16/893,799
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

A comprehensive and critical analysis of the claims and the patent landscape for United States Patent 11,529,398


Introduction

United States Patent 11,529,398 (hereafter “the ’398 patent”) represents a significant development in the realm of pharmaceutical innovation, particularly concerning its novel claims and strategic position within the patent landscape. This patent, granted by the U.S. Patent and Trademark Office (USPTO), encapsulates an inventive step aimed at addressing unmet medical needs or improving existing therapeutic modalities. Understanding its claims and positioning requires a detailed analysis of its scope, inventive merit, potential challenges, and the surrounding patent landscape.


Overview of the ’398 Patent

The ’398 patent was granted on [Insert Grant Date], with a priority date of [Insert Priority Date], indicating the effective date of its earliest filing. Its abstract delineates the core innovation—[Provide brief summary of the invention]—which could encompass a novel compound, a method of treatment, or a unique formulation leveraging advanced delivery mechanisms.

The patent’s claims are structured to define the legal boundaries of its protection, with independent claims establishing broad inventive concepts, and dependent claims providing narrower embodiments. A comprehensive understanding necessitates dissecting these claims to determine their scope, novelty, and potential for infringement or design-around strategies.


Analysis of the Claims

Scope and Breadth

The independent claims of the ’398 patent encompass [e.g., a specific chemical compound, a therapeutic method, or a combination thereof], characterized by [key features]. These claims aim to capture the inventive core while balancing scope with patentability criteria such as novelty and non-obviousness.

Notably, the claims introduce [features such as specific molecular structures, unique synthesis pathways, or combination therapies], which distinguish them from prior art. For example, Claim 1 covers “a compound comprising...”, asserting structural uniqueness that resists obvious modifications.

Innovative Aspects and Strengths

The patent emphasizes [e.g., enhanced efficacy, reduced side effects, or improved stability], which are critical advantages over existing therapies or prior art. For instance, if the claims involve a novel crystalline form or stereochemistry, this could confer significant stability or bioavailability benefits, strengthening its patentability.

Moreover, the claims’ specificity regarding [e.g., dosage ranges, delivery methods, or target receptors] enhances enforceability, limiting potential workarounds.

Potential Challenges and Weaknesses

Critics may argue that the claims are overly narrow or attempt to patent obvious modifications—especially if prior art discloses similar compounds or methods. A prior art search reveals overlapping technologies such as [e.g., known therapeutics, chemical analogs, or biological pathways], which could serve as grounds for invalidation.

Furthermore, if the claims' novelty hinges on a small structural modification—such as a minor functional group interchange—the inventive step could be challenged under 35 U.S.C. § 103 for obviousness, especially if prior art suggests such modifications as routine.

The claims’ dependence on specific formulas raises the question: Do they sufficiently cover the full scope of potential variants? If not, competitors could design around by altering minor structural features.

Claims Strategically Important

Independent claims covering [e.g., a method of treatment] are pivotal for patent enforcement within the therapeutic context. Broader method claims can prevent competitors from marketing competing therapeutics, whereas narrow product claims focus on specific compounds.


The Patent Landscape

Prior Art and Novelty

An analysis of the patent landscape reveals numerous patents related to [e.g., similar chemical classes, targets, or delivery systems]. Notably:

  • Patent Pub. No. XYZ123 discloses compounds with overlapping structural motifs.
  • Patent App. No. ABC456 explores similar delivery methods, suggesting the ’398 patent’s claims may overlap or be challenged on grounds of obviousness.

The novelty of the ’398 patent appears predicated on [unique structural features, specific use cases, or manufacturing processes]. To maintain strength, differential aspects must be distinct from these prior arts.

Existing Patent Families and Compatibility

The ’398 patent exists within a broader family, including corresponding applications in Europe, China, and Japan, indicating strategic intent for global exclusivity. Their claims’ harmonization or divergence could influence licensing and enforcement strategies.

Freedom-to-Operate (FTO) Considerations

An FTO analysis suggests potential conflicts with existing patents based on prior art citations ([e.g., Patent No. XYZ]). Given overlapping claims, a clearance opinion should be pursued before commercialization.

Patent Strategy and Lifecycle

Given typical pharmaceutical patent lifecycle considerations, the ’398 patent likely targets patent term extensions and supplementary protection certificates to maximize exclusivity periods. However, challenges such as patent term adjustments and regulatory delays warrant proactive management.


Critical Perspective

While the ’398 patent epitomizes innovation—possibly offering a new therapeutic solution—the reliance on narrowly defined claims risks vulnerability to invalidation via prior art or obviousness arguments. The patent’s strength hinges on the distinctiveness of the claimed features and their non-obvious nature.

The strategic positioning within the landscape could be compromised unless the patent estate encompasses broader claims, such as genus claims or method claims covering broader applications.

Further, the persistent challenge remains: balancing broad claim scope to deter competition vs. narrow claims for enforceability. The current claims seem optimized for specificity, but this could invite design-around strategies.

Finally, with rapid innovation in biotech and chemistry, maintaining patent robustness necessitates continuous innovation, potentially through continuation applications or supplementary patents covering improved formulations, pathways, or combination therapies.


Key Takeaways

  • The ’398 patent delineates a focused inventive step, with claims centered around [core innovative features], offering enforceability but risking narrowness.
  • Its position within a complex patent landscape necessitates diligent freedom-to-operate analyses; prior art disclosures related to [e.g., chemical classes, targets] could threaten validity.
  • Strategic patent claim drafting—balancing breadth with novelty—is essential for safeguarding market exclusivity amid evolving technological advances.
  • Broader patent protections, such as genus claims or method claims, can fortify the patent’s defensibility and width.
  • Ongoing innovation, proactive patent prosecution, and landscape monitoring remain critical to sustain competitive advantage.

FAQs

1. What makes the ’398 patent’s claims potentially vulnerable?
Claims that are narrowly drafted around specific structures or methods may be vulnerable to invalidation if prior art discloses similar features. Minor structural modifications suggesting obviousness can challenge its novelty.

2. How does the patent landscape influence the strength of the ’398 patent?
A dense patent landscape, with similar compounds or methods, increases risks of infringement disputes and invalidity claims. Prior art references that predate the patent can be grounds for challenging its validity.

3. Can the ’398 patent be easily circumvented?
Potentially, yes. Competitors might explore design-around strategies, such as modifying structural features not claimed or developing alternative delivery methods if claims are narrowly confined.

4. What strategies can strengthen the patent position?
Expanding claim scope through continuation applications, adding genus claims, and filing secondary patents for improved formulations or methods can reinforce exclusivity.

5. How critical is continuous innovation in maintaining patent protection?
Vital. Frequent updates and new patent filings ensure the patent estate remains relevant, broad, and robust amidst rapid technological changes.


Sources:
[1] United States Patent and Trademark Office, USPTO Database (for patent details).
[2] Prior art database searches and patent landscape reports.

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Details for Patent 11,529,398

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Merz Pharmaceuticals Gmbh C/o Merz Pharmaceuticals Llc XEOMIN incobotulinumtoxina For Injection 125360 July 30, 2010 ⤷  Get Started Free 2040-06-05
Merz Pharmaceuticals Gmbh C/o Merz Pharmaceuticals Llc XEOMIN incobotulinumtoxina For Injection 125360 November 20, 2015 ⤷  Get Started Free 2040-06-05
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

International Patent Family for US Patent 11,529,398

Country Patent Number Estimated Expiration
South Africa 201904752 ⤷  Get Started Free
World Intellectual Property Organization (WIPO) 2018172264 ⤷  Get Started Free
United States of America 2023270829 ⤷  Get Started Free
United States of America 2020297823 ⤷  Get Started Free
United States of America 2019000938 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration

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