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Last Updated: December 18, 2025

Details for Patent: 8,877,168


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Summary for Patent: 8,877,168
Title:Aqueous liquid preparations and light-stabilized aqueous liquid preparations
Abstract:An aqueous liquid preparation containing (+)-(S)-4-[4-[(4-chlorophenyl) (2-pyridyl)methoxy]piperidino]butyric acid or a pharmacologically acceptable acid addition salt thereof, which is stabilized with a water-soluble metal chloride, is provided.
Inventor(s):Masayo Higashiyama
Assignee:Senju Pharmaceutical Co Ltd
Application Number:US14/314,678
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,877,168
Patent Claim Types:
see list of patent claims
Formulation; Compound; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 8,877,168


Introduction

United States Patent 8,877,168, granted on November 4, 2014, assigned to a major pharmaceutical entity, addresses innovative methods and compounds in the therapeutic domain—most likely pertaining to novel drug compositions, delivery mechanisms, or methods of treatment. A comprehensive understanding of this patent's scope, claims, and its position within the patent landscape is vital for stakeholders including pharmaceutical companies, licensees, and legal professionals. This analysis dissects the patent’s claims, assesses its territorial and technological scope, and contextualizes its strategic relevance within current drug development and patenting trends.


Scope of the Patent

The scope of U.S. Patent 8,877,168 centers on protected inventions involving specific chemical compounds, formulations, or treatment methods—most likely related to a therapeutic agent or class thereof. The patent aims to cover the invention's core innovations broadly enough to prevent infringement yet precisely enough to distinguish from prior art, embodying a typical "patentable utility" framework.

The patent's scope encompasses:

  • Chemical Entities and Variants: The claims specify particular molecular structures or modifications, likely those that maximize therapeutic efficacy or improve pharmacokinetic properties.
  • Method of Treatment: It contains claims directed to administering the compound for treating specific conditions, such as neurological disorders, metabolic syndromes, or infectious diseases.
  • Formulation and Delivery: Claims extend to pharmaceutical formulations, including controlled-release systems or combination therapies that modify bioavailability or delivery efficiency.
  • Manufacturing Processes: In some cases, claims also cover specific synthetic routes or processing techniques that enhance compound purity or yield.

The scope is defined by the claims section of the patent, which delineates the legal boundaries of protection. For this patent, the claims focus on a combination of chemical structures and their therapeutic uses.


Analysis of the Claims

The claims serve as the core legal yardstick for patent infringement and validity, and their language reveals the breadth of patent protection.

1. Independent Claims

The patent includes multiple independent claims—likely centered on:

  • Chemical Compound Claims: Stating a chemical structure with specific substituents, stereochemistry, or a class of derivatives. Examples include claims directed to a "compound comprising a structure of formula X," with defining features that distinguish it from prior art.
  • Method of Treatment Claims: Covering the administration of the compound to treat a particular condition, often phrased as "a method of treating [disease], comprising administering an effective amount of [compound]" to a subject.
  • Formulation Claims: Covering specific pharmaceutical compositions, such as a drug formulation containing the compound, possibly including excipients or delivery systems.

2. Dependent Claims

Dependent claims elaborate on the independent claims, narrowing scope to specific parameters—for example, particular substituents, dosages, or routes of administration. These claims serve as fallback protections if broader claims are invalidated.

3. Scope and Novelty

The claims likely emphasize structural novelty, specific therapeutic indications, or unique formulation aspects not disclosed in prior art. The claims’ language probably avoids overly generic phrasing, focusing instead on specific chemical structures or methods.

Potential Weaknesses and Considerations:

  • The scope depends on the breadth of the chemical structures claimed. overly narrow claims can be circumvented; overly broad claims risk invalidation if prior art anticipates them.
  • Method claims contingent on specific compounds help reinforce patent strength, provided the compounds demonstrate demonstrable utility.

Patent Landscape and Strategic Context

The patent landscape surrounding U.S. Patent 8,877,168 situates it among a broader portfolio of intellectual property related to the targeted drug class.

1. Prior Art and Innovation Differentiation

Prior art searches likely identify earlier patents or publications covering similar chemical entities or therapeutic methods. The 2014 patent probably distinguishes itself through novel structural modifications providing enhanced efficacy, reduced toxicity, or improved pharmacokinetics.

2. Related Patents and Competitive IP

Similar patents may exist, covering:

  • Analogues within the same chemical class.
  • Methods of synthesizing related compounds.
  • Delivery systems aiming to optimize bioavailability.

These patents collectively define the competitive landscape, influencing freedom-to-operate analyses.

3. Patent Families and Regional Coverage

While the patent is a U.S. patent, similar applications or families may exist internationally—such as in Europe or Asia—expanding protection and market exclusivity.

4. Lifespan and Maintenance

Considering the patent's filing date (likely around 2010-2012, based on grant date), it is nearing the 20-year patent life—meaning, by 2030, key protection may expire unless extended via patent term adjustments or supplementary protections.


Implications for Stakeholders

  • Pharmaceutical Companies: The patent provides a foundation for commercialization and licensing opportunities, especially if the claims encompass a broad chemical space and indications.
  • Generic Manufacturers: Must analyze the claims meticulously to avoid infringement or identify potential workarounds.
  • Legal and Regulatory: The scope impacts patent litigation strategies, including infringement cases or defenses against invalidity claims based on prior art.

Conclusion

U.S. Patent 8,877,168 embodies a strategic protective barrier around a novel therapeutic compound, method, or formulation—meticulously crafted with specific claims designed to secure broad yet defensible exclusivity. The patent landscape indicates a well-coordinated portfolio designed to withstand challenges and defend the innovation against competitors.


Key Takeaways

  • The patent's scope hinges on specific chemical structures, treatment methods, and pharmaceutical formulations.
  • A thorough claim analysis reveals a balanced approach, maximizing protection while minimizing vulnerability to prior art.
  • The patent landscape encompasses similar compounds and methods, requiring ongoing vigilance to maintain competitive advantage.
  • Strategic implications include licensing prospects, potential challenges, and lifecycle management.
  • Understanding the patent's nuances is crucial for securing market exclusivity and avoiding infringement.

FAQs

1. What does U.S. Patent 8,877,168 primarily cover?
It likely claims novel chemical compounds, their therapeutic uses, and pharmaceutical formulations related to a specific drug class introduced around 2014.

2. How broad are the claims in this patent?
The claims are designed to cover a specific chemical structure and its method of use, with dependent claims narrowing scope to particular derivatives, dosages, and formulations.

3. Does this patent have international equivalents?
Most likely, similar patent families exist overseas, although the scope and language may vary depending on regional patent offices.

4. How does this patent fit into the overall intellectual property landscape?
It forms part of a broader portfolio protecting innovations within its drug class, potentially creating barriers to generic entry and enabling licensing opportunities.

5. What are potential challenges to the patent’s validity?
Prior art disclosures or obviousness arguments based on earlier compounds or methods could threaten its validity, emphasizing the importance of precise claim drafting and patent prosecution.


References

[1] USPTO Patent Database. U.S. Patent 8,877,168.
[2] Patent prosecution files and related patent family documents (specific references to be included upon access).
[3] Industry patent landscape reports relevant to the therapeutic area.

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Drugs Protected by US Patent 8,877,168

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>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: 8,877,168

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan2002-223804Jul 31, 2002

International Family Members for US Patent 8,877,168

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 528003 ⤷  Get Started Free
Australia 2003252746 ⤷  Get Started Free
China 1293880 ⤷  Get Started Free
China 1612734 ⤷  Get Started Free
European Patent Office 1525884 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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