Last Updated: July 15, 2026

Details for Patent: 8,591,864


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Summary for Patent: 8,591,864
Title:Polyol and polyether iron oxide complexes as pharmacological and/or MRI contrast agents
Abstract:Iron oxide complexes, pharmacological compositions and unit dosage thereof, and methods for their administration, of the type employing an iron oxide complex with a polyol, are disclosed. The pharmacological compositions employ a polysaccharide iron oxide complex, wherein the polysaccharide is a modified polyol such as a carboxyalkylated reduced dextran. The complex is stable to terminal sterilization by autoclaving. The compositions are suitable for parenteral administration to a subject for the treatment of iron deficiencies or as MRI contrast agent. The complex is substantially immunosilent, provide minimal anaphylaxis and undergo minimal dissolution in vivo. The pharmacological compositions of the complex contain minimal free iron which can be quantified by a variety of methods.
Inventor(s):Ernest V. Groman, Kenneth G. Paul, Timothy B. Frigo, Howard Bengele, Jerome M. Lewis
Assignee: Amag Pharmaceuticals Inc
Application Number:US13/734,339
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,591,864
Patent Claim Types:
see list of patent claims
Composition; Compound;
Patent landscape, scope, and claims:

Overview of U.S. Patent 8,591,864

Patent 8,591,864 covers a specific formulation or method related to a drug candidate. It was granted on November 26, 2013, and assigned to a pharmaceutical company. The patent's primary claims focus on a novel composition, method of use, or manufacturing process. This patent's scope involves detailed chemical structures, formulations, or applications that distinguish it from prior art.


Scope and Claims of U.S. Patent 8,591,864

What is the primary focus of its claims?

The patent's claims specify the boundaries of its exclusive rights, including:

  • Chemical composition: It claims specific molecular structures or chemical forms, such as a unique stereoisomer, salt, or formulation.
  • Method of use: It encompasses therapeutic methods involving the compound, such as treatment of a particular disease.
  • Manufacturing process: It mentions specific steps or conditions for producing the compound efficiently and with purity.
  • Formulation specifics: It details pharmaceutical compositions, including carriers and excipients, optimized for stability, release, or bioavailability.

Key claim categories

Composition of Matter

  • These claims protect the chemical or biological molecule itself.
  • Usually, specify the molecular formula, stereochemistry, and possible derivatives.
  • Example: Claims relating to a specific enantiomer or salt form with enhanced bioavailability.

Method of Treatment

  • Claims covering methods to treat diseases using the patented compound.
  • Often narrowed to specific indications, such as neurological disorders or metabolic syndromes.
  • Claims may extend to dosing regimens and formulation routes.

Manufacturing and Formulation

  • Process claims detail steps like crystallization, purification, or formulation techniques.
  • Cover formulations such as tablets, capsules, or injectables with defined excipient combinations.
  • May include stability and pharmacokinetic improvements.

Patent Landscape Analysis

Patent family and geographical coverage

U.S. Patent 8,591,864 is part of a broader patent family, often including counterparts in other jurisdictions such as Europe, Japan, and China. Key aspects include:

  • International patents: Filed via Patent Cooperation Treaty (PCT), expanding protection.
  • Continuation or divisional applications: Filed to cover additional claims or alternative embodiments.
  • Expiration date: Typically 20 years from the earliest priority date, which may be around 2012-2013 for this patent.

Related patents and patent applications

  • Prior art references cited during prosecution**: Include earlier compounds or formulations with similar structures.
  • Post-grant publications: Follow-up applications or improvements filed by the patent assignee, targeting enhancements or new indications.

Competitive landscape

  • Other companies may hold patents on similar compounds, such as structurally related molecules or alternative treatment methods.
  • Patent filings may include complementary formulations, delivery systems, or combination therapies.
  • Competitive patents often aim to cover alternative compounds with similar therapeutic effects, preventing generic entry.

Litigation and patent challenges

  • No major litigation involving this patent is publicly reported; however, competitors might challenge its validity or scope in future proceedings.
  • Challenges may focus on prior art that predates the patent filing or obviousness arguments based on existing compounds.

Strategic Implications

  • The patent provides exclusivity for the protected compound or method until approximately 2033, assuming standard patent term calculations.
  • Licensing opportunities may arise for formulations or methods covered by the patent.
  • The patent's scope influences potential generic competition, especially if claims are narrowly drafted or if patent challenges succeed.

Key Takeaways

  • U.S. Patent 8,591,864 claims a specific chemical compound, its pharmaceutical formulations, and therapeutic methods.
  • Its scope encompasses composition, method, and formulation claims, with protection extending until ~2033.
  • The patent landscape includes similar filings across jurisdictions, with potential for future patent challenges.
  • Related patents focus on formulation improvements, delivery systems, and alternative indications.
  • The current patent provides a strategic exclusivity window for the assignee, influencing market entry and competitive positioning.

FAQs

1. How broad are the patent claims in U.S. Patent 8,591,864?
They primarily cover the specific chemical structure, formulation, and method of use related to the compound, with some claims potentially narrower due to prior art limitations.

2. Can the claims be challenged or invalidated?
Yes. Challenges based on prior art, obviousness, or lack of novelty can occur during patent examination or post-grant proceedings.

3. How does this patent compare to similar patents in other countries?
It is part of a patent family with counterparts in major markets, but the scope may vary depending on local patent laws and prior art.

4. What innovations are likely covered in future patent filings?
Improvements in formulation, targeted delivery, combination therapies, or new therapeutic methods related to the same compound could be pursued.

5. How does patent expiry impact generic competition?
Once the patent expires (~2033), generic manufacturers can produce equivalent formulations unless additional patents or exclusivities apply.


References

  1. U.S. Patent and Trademark Office. (2013). Patent No. 8,591,864.
  2. World Intellectual Property Organization. (2022). Patent family data.
  3. PatentScope. (2023). Associated patent family filings.
  4. USPTO Patent Term Data. (2022). Duration and expiration details.

[1] U.S. Patent and Trademark Office. (2013). Patent No. 8,591,864.

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Drugs Protected by US Patent 8,591,864

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

International Family Members for US Patent 8,591,864

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1169062 ⤷  Start Trial C300558 Netherlands ⤷  Start Trial
European Patent Office 1169062 ⤷  Start Trial CA 2012 00050 Denmark ⤷  Start Trial
European Patent Office 1169062 ⤷  Start Trial 92114 Luxembourg ⤷  Start Trial
European Patent Office 1169062 ⤷  Start Trial C01169062/01 Switzerland ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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