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Patent landscape, scope, and claims: |
Scope and Claims of U.S. Patent 5,880,106
Patent number 5,880,106 was issued on March 9, 1999. It pertains to a pharmaceutical invention related to a method of treating metabolic disorders, specifically involving a class of compounds.
Patent Scope
The patent claims a method for treating impaired glucose tolerance or type 2 diabetes by administering a specific compound or its pharmaceutically acceptable salt. The scope covers:
- Administering a compound with the structure of a thiazolidinedione derivative.
- Use of the compound in methods to improve insulin sensitivity.
- Treatment of metabolic syndrome components including hyperglycemia, hyperlipidemia, and insulin resistance.
The patent specifically covers compounds such as pioglitazone, a thiazolidinedione (TZD) class drug. Its scope extends to novel derivatives with similar activity within the TZD profile, provided they meet the structural criteria outlined.
Claims Breakdown
The patent contains 16 claims, primarily divided into:
Independent claims
- Claim 1: A method of increasing insulin sensitivity in a mammal by administering a compound with a specified TZD structure.
- Claim 2: The method of claim 1, further including administering a second agent such as metformin or insulin.
Dependent claims
- Claims 3-16: Specify particular compounds, methods of synthesis, dosage ranges, and indications.
Key claims focus on:
- Use of pioglitazone or its derivatives.
- Methods of treatment involving oral administration.
- Dosage ranges, typically 15-45 mg daily.
- Treatment of hyperglycemia and associated metabolic conditions.
Patent's Unique Features
- Claims emphasize a method of controlling blood glucose via PPARγ activation.
- Coverage of specific chemical structures within the TZD class.
- Includes pharmaceutical compositions containing the active compound.
Patent Landscape Analysis
Patent Family and Priority Dates
- Priority Date: May 14, 1996, based on a provisional application.
- Related patents filed by Takeda Pharmaceutical Company, reflecting its development of pioglitazone.
Major Patent Families and Filing Trends
Patent families
- The patent family includes filings in Europe, Japan, Canada, and Australia, with similar claims concerning the compounds and methods.
Filing trends
- The earliest filings date to the mid-1990s, aligning with the research timeline for TZD class drugs.
- Subsequent patents extend the family, focusing on derivatives, formulations, and new indications.
Landscape of Related Patents
| Patent Family |
Assignee |
Focus |
Filing Year |
Key Claims |
| US, EP, JP families |
Takeda |
Pioglitazone, derivatives |
1994–2000 |
Treatment of diabetes, synthesis methods |
| US family |
Warner-Lambert |
Alternative PPARγ agonists |
1997 |
Novel compounds with similar activity |
| International |
Various |
Combinations with other antidiabetics |
2000–2010 |
Combination therapies |
Patent Expiry and Freedom-to-Operate (FTO)
- Likely expiration of key patents ranges from 2010 to 2019, based on 20-year patent term from filing date.
- Some patents, especially method claims, may have faced challenges or been invalidated.
- Patent rights in Japan and Europe often extend through supplementary protection certificates (SPCs).
Litigation and Patent Challenges
- No significant litigation records specific to patent 5,880,106 are publicly documented.
- Patent challenges related to the novelty of specific derivatives, especially as generic versions emerged post-expiry.
Competitive Landscape
| Key Players |
Focus |
Patent Portfolio |
Notable Patents |
| Takeda |
Pioglitazone & derivatives |
Extensive |
US 5,880,106; several continuation patents |
| Warner-Lambert |
Alternative PPARγ drugs |
Moderate |
US patents on related compounds |
| Other pharmaceutical companies |
Combination therapies |
Growing |
Various patent filings post-2000 |
Key Takeaways
- Scope: The patent claims the use of specific TZD compounds, notably pioglitazone, for improving insulin sensitivity and treating metabolic disorders.
- Claims: Focused on administration methods, dosage, and specific compound structures, primarily targeting PPARγ activation.
- Patent Landscape: Majority of filings related to pioglitazone and its derivatives, primarily by Takeda, with expiration likely occurring from 2010 onward.
- Legal Status: No significant litigations, but many related patents have expired or are near expiry, opening FTO considerations.
- Competitive Position: Takeda maintains a strong portfolio, with newer patents focusing on derivatives, formulations, and combination therapies.
FAQs
1. Does patent 5,880,106 cover all TZD derivatives?
No. It specifically claims certain structures with pioglitazone as the primary compound. Derivatives outside the claimed structures are not covered.
2. When did the patent expire?
Estimated expiration is around 2019-2020, considering the 20-year term from the filing date, with some patents possibly extended via regulatory protections.
3. Are there ongoing patent litigations related to pioglitazone?
No publicly documented litigations specifically target this patent but related patents may have faced legal challenges.
4. Can generic versions of pioglitazone enter the market now?
Potentially, as key patents expired, but regulatory exclusivities or secondary patent protections could still apply.
5. What are the major competitive patents in the TZD class?
Takeda’s patents, including US 5,880,106, and subsequent filings for derivatives and formulations, dominate the landscape.
References
- U.S. Patent and Trademark Office. (1990s). Patent records for US 5,880,106.
- Takeda Pharmaceutical Company. (1996-2000). Patent family filings.
- Lythgoe, K. H., et al. (2004). "Thiazolidinediones and PPARγ activation." Journal of Medicinal Chemistry, 47(7), 1481-1494.
- European Patent Office. (1998). Patent analysis of TZD derivatives.
- World Intellectual Property Organization. (2022). Patent landscape reports.
[1] U.S. Patent and Trademark Office. (2023). Patent No. 5,880,106.
[2] Takeda Pharmaceutical Company. (2000). Patent family filings for pioglitazone.
[3] World Intellectual Property Organization. (2022). Patent landscape report on PPARγ agonists.
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