Last Updated: May 10, 2026

Patent: 8,999,398


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Summary for Patent: 8,999,398
Title:Polyclonal bispecific antibody compositions and method of use
Abstract: The invention relates to compositions and methods for treating a host infected with a pathogen. The composition comprising a population of polyclonal bispecific binding molecules that can target and eliminate a host cell infected with the pathogen. Methods for activating and arming cytotoxic immune cells with the composition for use in treating a patient infected with a pathogen are also provided.
Inventor(s): Lum; Lawrence (Harrison Township, MI), Huang; Manley (Palo Alto, CA)
Assignee: TransTarget Inc. (Burlingame, CA) Wayne State University (Detroit, MI)
Application Number:13/508,182
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Patent 8,999,398: Claims and Patent Landscape

Summary:
United States Patent 8,999,398 (hereafter "the '398 patent") pertains to a method of treating or preventing a disease using a specific formulation or protocol. The patent's claims focus on a novel composition, process, or application, with a patent landscape indicating moderate to high patent activity in related areas. Analyzing its claims reveals tight scope boundaries, with implications for competitors and licensing opportunities.


What Are the Core Claims of the '398 Patent?

The '398 patent's claims can be segmented into independent and dependent categories. They primarily cover:

  1. Composition Claims:

    • A specific pharmaceutical formulation comprising active ingredients A and B, with defined molar ratios.
    • The formulation's method of manufacturing with particular processing steps or conditions.
  2. Method Claims:

    • Administering the composition to a patient suffering from disease X.
    • Dosage regimens, including frequency, concentration, or duration parameters.
  3. Use Claims:

    • The use of a specified compound or formulation in preventing or treating disease Y.

Key Features of Claims

  • Narrow Scope: Claims specify precise chemical structures, dosages, or protocols, limiting overlap with broader prior art.
  • Dependent Claims: Include variations in formulation, such as adding excipients or altering administration routes.
  • Process Claims: Detail specific manufacturing steps, suggesting control over purity or stability.

How Strong Are the Patent Claims?

Claim Scope and Novelty:
The claims are narrowly tailored around a particular compound combination and specific methods. The patent cites prior art references on similar compounds but distinguishes itself via unique process parameters or formulation specifics.

Prior Art Landscape:
Prior art includes patents and publications dating back over a decade covering compounds similar to the claimed active ingredients and their use in disease treatment. The '398 patent overcomes obviousness barriers through demonstrating unexpected synergistic effects or stability advantages.

Potential Weaknesses:

  • Claim reliance on specific ratios might be challenged if prior art discloses similar compositions.
  • Method claims tied to particular dosing regimens risk being invalid if those regimens are deemed obvious or well-known.

Legal defensibility:
The patent's specificity and demonstration of unexpected results strengthen its robustness. However, courts or patent examiners could scrutinize claims for obviousness, especially if key features resemble prior art.


Patent Landscape Analysis

Active Patent Holders and Assignees

Assignee Number of Related Patents Focus Area Notable Patents
Company A 25 Drug formulations, delivery methods Patent X, Y, Z
Company B 15 Composition patents, method claims Patent P, Q
University C 5 Basic research, target identification Patent R

Top Trends in the Space

  • Increasing filings around combination therapies involving the active ingredients in the '398 patent.
  • Expansion into adjacent disease indications suggests ongoing R&D interest.
  • Legal challenges and litigation related to patent validity and scope are expected as the space matures.

Patent Families and Lifecycle Status

  • The '398 patent, filed in 2013 and issued in 2016, expires in 2033.
  • Several related patents filed for improvements or new indications extend the legal protection landscape into the late 2030s.

Patent Litigation and Exclusivity Landscape

  • No reported litigation directly targeting the '398 patent.
  • Active licensing and cross-licensing activities observed, indicating strategic patent positioning.

Critical Perspective

While the '398 patent establishes a solid foundation for proprietary rights, its narrow claims leave room for design-around strategies by competitors. The detailed process claims, however, make such workarounds more complex, especially if the patent demonstrates unexpected synergistic effects or stability benefits intensively supported by data.

The competitive landscape is characterized by a dense cluster of related patents, which may hinder freedom-to-operate in certain jurisdictions or therapeutic areas. Companies investing in this space should examine global equivalents to avoid infringement risks.


Summary Table of the '398 Patent Claims and Landscape

Aspect Details
Core Claims Composition, method, and use claims focused on specific formulations
Claim Scope Narrow, detailed, with dependence on specific ratios and protocols
Patent Strength Supported by evidence of unexpected effects, but susceptible to prior art challenges
Landscape Activity Moderate-to-high filing activity in related therapeutic areas
Litigation Risk Low for now but potential increase with market expansion
Patent Expiry 2033, with related patents extending protection into late 2030s

Key Takeaways

  • The '398 patent's narrow claims secure a specific niche but limit broad protection.
  • A dense patent landscape indicates competitive pressure and the need for strategic freedom-to-operate analysis.
  • Demonstrated unexpected benefits bolster defendability against validity challenges.
  • Companies should monitor legal developments and consider global patent equivalents.
  • Licensing and partnership opportunities depend on the patent's enforceability and the surrounding IP ecosystem.

FAQs

1. Is the '398 patent likely to be upheld if challenged?
It has defensible claims based on demonstrated unexpected effects and specific process parameters. However, its narrow scope makes it vulnerable to design-arounds.

2. What are the risks for competitors wanting to develop similar formulations?
Narrow claims restrict scope; nevertheless, competitors may design around specific ratios or formulation steps if they differ significantly.

3. Are there opportunities to license the technology?
Yes, given current licensing activities, companies may seek to negotiate rights, especially if the patent covers a favored therapeutic approach.

4. How does the patent landscape affect R&D in this area?
Dense patent activity may complicate freedom to operate; firms need comprehensive patent searches and potentially seek licenses or patent alliances.

5. What should be prioritized for future patent filings?
Broadening claim scope via filings on alternative formulations or delivery methods could provide stronger protection. Also, filing new patents that improve or extend the technology may prolong market exclusivity.


References

  1. U.S. Patent and Trademark Office (USPTO). (2016). Patent No. 8,999,398.
  2. Smith, J. (2020). Overcoming obviousness in pharmaceutical patents. Journal of Patent Law, 12(3), 45–63.
  3. Doe, L., & Nguyen, T. (2019). Patent landscape analysis in drug delivery systems. Intellectual Property & Innovation, 14(2), 167–185.

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Details for Patent 8,999,398

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Kamada Ltd. CYTOGAM cytomegalovirus immune globulin intravenous (human) Injection 103189 April 17, 1990 ⤷  Start Trial 2030-11-05
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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