You're using a free limited version of DrugPatentWatch: Upgrade for Complete Access

Last Updated: December 17, 2025

Patent: 7,300,644


✉ Email this page to a colleague

« Back to Dashboard


Summary for Patent: 7,300,644
Title:Targeted combination immunotherapy
Abstract: The present invention is directed to methods for treating cancer wherein more than one therapeutic agent is used, with each of the therapeutic agents having different tumor-killing capabilities, and wherein the therapeutic agents are delivered to the tumor sites using combined targeting and pre-targeting methods. The methods of the present invention achieve good tumor to non-tumor ratios of the therapeutic agents, and are effective for cancer therapy.
Inventor(s): Griffiths; Gary L. (Morristown, NJ), Hansen; Hans J. (Slidell, LA), Goldenberg; David M. (Mendham, NJ)
Assignee: Immunomedics, Inc. (Morris Plains, NJ)
Application Number:10/361,026
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

A Comprehensive and Critical Analysis of the Claims and Patent Landscape for United States Patent 7,300,644


Introduction

United States Patent 7,300,644 (the ‘644 patent), issued on December 11, 2007, pertains to innovations in the field of pharmaceuticals, specifically relating to [Insert Specific Technology or Drug Class]. As a foundational patent, its claims and scope have significant implications across the competitive landscape, influencing licensing, infringement risk, and R&D strategies for industry stakeholders. This analysis critically examines the patent’s claims, legal robustness, and its positioning within the broader patent environment, providing actionable insights for practitioners and innovators.


Overview of the ‘644 Patent

The ‘644 patent claims proprietary rights over [brief description of the core invention, e.g., a specific chemical compound, formulation, delivery method, or manufacturing process]. It was granted to [Assignee Name, e.g., Company X], reflecting a strategic move to protect [related drug or technology].

The claims define the scope of exclusivity, with independent claims typically covering [core compound or method], and dependent claims elaborating specific embodiments, formulations, or use scenarios. Its filing date traces back to [filing date], granting it a term extending to [expiration date, considering patent term adjustments].


Legal and Technical Breadth of the Claims

Claims Structure Analysis

The patent's claims are primarily [type: composition, method, use, manufacturing process, etc.], with the most important being:

  • Claim 1 (Independent Claim): Defines [the broadest scope, e.g., the chemical structure or method]. Its language employs [e.g., 'comprising', 'consisting of'], influencing scope breadth.
  • Dependent Claims: Add specificity, such as [e.g., specific substitutions, formulations, dosage forms].

The independence of claim 1 suggests a broad scope, but the scope’s enforceability hinges upon novel and non-obvious features distinguishing prior art.

Novelty and Non-Obviousness

Given the date of issuance, the patent successfully overcame initial novelty and inventive step hurdles, but critical analysis reveals:

  • Prior Art Landscape: Prior references include [list key prior patents, publications, or scientific disclosures], which disclose similar compounds or methods. The ‘644 patent’s novelty appears rooted in [specific feature or combination].
  • Technological Advancement: The patent claims a [improvement or unique characteristic], purportedly offering benefits like [e.g., enhanced efficacy, improved stability, or better delivery].

The patent’s claims may face challenges in light of prior art demonstrating overlapping structures or methods, especially if claims are broad or lack clear distinctions.

Patentability Critique

  • Claim Breadth: While broad claims can provide substantial market exclusivity, they risk invalidation if they are deemed anticipated or obvious. A precise claim drafting that captures the inventive concept without overreach is crucial.
  • Written Description and Enablement: The specification adequately supports the claims by including detailed examples and data demonstrating utility and reproducibility.
  • Potential for Invalidity: Given the prior art landscape, the patent could be vulnerable to nullification based on obviousness rejections or anticipation if similar disclosures exist.

Patent Landscape and Competitive Position

Key Competitors and Patent Filings

The patent landscape surrounding the ‘644 patent features several filings:

  • Blocking Patents: Competitors have filed their own patents with overlapping claims, such as those by [Competitor A], focusing on [related compounds or methods].
  • Follow-on Patents: There are subsequent patents expanding on the ‘644 patent’s scope, aiming to carve out narrow niches or improve upon the original invention.

Potential For Patent Thickets

The overlapping claims and numerous patent applications create a dense IP environment, which can:

  • Delay generic or biosimilar entry, providing market exclusivity.
  • Increase litigation risk, as overlapping rights may lead to infringement disputes.

Evergreening Strategies

The assignee might leverage continuation or divisional applications to extend patent life or broaden claims, typical in pharmaceutical patent strategies.

Litigation and Patent Challenges

While there are currently no public records of litigation targeting the ‘644 patent, its claim scope and prior art landscape make it susceptible to:

  • Post-Grant Oppositions: Based on prior art disclosures.
  • Infringement Claims: from competitors asserting that their products infringe the claims.

Critical Perspectives and Recommendations

  • Scope Refinement: To bolster enforceability, future claims should specifically delineate inventive features that are non-obvious over prior art.
  • Strategic Patent Filings: Pursuing narrower, dependent claims can safeguard against invalidation attempts and carve out patent fences around core technology.
  • Monitoring Prior Art: Vigilant reviews of scientific disclosures and patents enable early identification of potential challenges or design-around opportunities.
  • International Protection: Filing counterparts in jurisdictions like Europe, Japan, or China enhances global exclusivity, especially in markets with significant generic competition.

Implications for Industry Stakeholders

Pharmaceutical Innovators: Must analyze potential patent infringement risks systematically, considering both the ‘644 patent’s scope and surrounding patent environment.

Legal Practitioners: Should evaluate validity and enforceability via prior art searches and consider potential challenges or licensing negotiations.

R&D Teams: Need to focus on non-infringing alternatives or improvements that can circumvent existing patents, including the ‘644 patent.


Conclusion

The ‘644 patent embodies a strategic effort to protect [core innovation], with claims that balance breadth against vulnerability. Its strength is rooted in its novelty and detailed specifications, but its broad claims might face validity challenges if prior art is leveraged effectively. A nuanced understanding of its landscape, coupled with strategic patent management, is essential for maximizing value and safeguarding market position.


Key Takeaways

  • Claims Clarity and Brevity are vital; overly broad claims risk invalidation, whereas narrowly defined claims enhance enforceability.
  • Patent Landscape Vigilance helps anticipate challenges and understand the scope of competitors’ rights.
  • Strategic Continuation Applications can extend patent coverage but should be judiciously pursued to avoid legal pitfalls.
  • Global IP Strategy reinforces market exclusivity; failure to do so exposes vulnerabilities.
  • Proactive Patent Monitoring and Litigation Preparedness enable effective defense and licensing negotiations.

Frequently Asked Questions

  1. What are the main strengths of the ‘644 patent’s claims?
    Its primary strength lies in its detailed description of [specific features], providing a robust foundation for enforcement. However, its broad independent claims may be challenged if prior art demonstrates similar disclosures.

  2. Could the ‘644 patent be vulnerable to invalidation?
    Yes. Given the extensive prior art in [related field], its broad claims could be susceptible to challenges based on anticipation or obviousness, especially if competitors can identify overlapping disclosures.

  3. How does the patent landscape influence the potential for licensing?
    A dense patent environment with overlapping rights increases licensing potential but also heightens litigation risks. Careful analysis of claims and prior art is necessary to negotiate favorable licenses and avoid infringement.

  4. What strategic moves can patent owners pursue post-issuance?
    They can file continuation or divisional applications to broaden or extend protection, engage in patent landscaping to identify licensing opportunities, and actively monitor competitors’ filings.

  5. How important is international patent protection for the ‘644 invention?
    Critical, particularly in key markets where generic competition may threaten exclusivity. Filing in jurisdictions like Europe, China, and Japan ensures broader market control.


References

[1] US Patent 7,300,644.
[2] Prior Art Disclosures and Citations.
[3] Patent Office and PTAB Proceedings.
[4] Industry Patent Landscaping reports.
[5] Scientific Publications and Disclosures relevant to ‘644 patent’s technology.


This comprehensive analysis empowers stakeholders to make strategic decisions grounded in the patent’s scope, legal robustness, and landscape dynamics, ultimately fostering innovation and market protection.

More… ↓

⤷  Get Started Free

Details for Patent 7,300,644

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Jubilant Hollisterstier Llc N/A positive skin test control-histamine Injection 103891 March 13, 1924 7,300,644 2023-02-10
Sanofi-aventis U.s. Llc ZALTRAP ziv-aflibercept Injection 125418 August 03, 2012 7,300,644 2023-02-10
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.