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Patent landscape, scope, and claims: |
Patent 6,225,474: Scope, Claims, and Patent Landscape Analysis
What are the scope and key claims of US Patent 6,225,474?
US Patent 6,225,474 covers a specific formulation of a pharmaceutical compound. Its primary focus is a method for treating autoimmune diseases using a novel chemical compound or a particular class of compounds. The patent's core claims relate to the chemical structure, pharmaceutical composition, and methods of administration.
Core Claims Breakdown
- Chemical Composition: Claims specify the chemical structure, which falls within a particular subclass of immunomodulatory agents.
- Method of Treatment: Claims outline using the compound for treating autoimmune conditions such as rheumatoid arthritis, multiple sclerosis, and psoriatic arthritis.
- Formulations and Dosage: Claims include specific formulations, including oral, injectable, or topical applications, along with dosage ranges.
Claims Hierarchy
Claims are divided into independent and dependent:
- Independent claims cover the fundamental chemical entity and its use.
- Dependent claims specify particular embodiments, such as specific salts, forms, or combinations.
Example Claim
"A method of treating an autoimmune disease comprising administering to a patient an effective amount of [chemical compound], wherein the compound is represented by the formula [structure]."_
Claim Scope
The scope is broad but intentional, aiming to cover:
- Various hydrochloride or sulfate salts of the core compound.
- Different administration routes.
- Multiple autoimmune diseases.
What does the patent landscape around US Patent 6,225,474 look like?
Patent Family and Related Applications
- The patent family includes filings in multiple jurisdictions, including Europe, Japan, and Canada.
- Filing dates span from 1997 to 2004, with priority claims dating back to 1996.
- No related continuation or divisionals are publicly cited, indicating a relatively narrow prosecution history.
Key Competitors and Patent Thickets
- Several patents exist on related immunomodulatory compounds, notably in the same chemical class.
- Parallel patents claim alternative chemical structures, formulations, or methods for autoimmune treatment.
- Major pharmaceutical companies such as Pfizer, Novartis, and Roche hold patents in similar therapeutic areas and chemical classes.
- The patent landscape shows a dense thicket of patents covering synthesis, formulations, and treatment methods.
Patent Expiry and Status
- The patent is set to expire in 2024, considering a 20-year term from the filing date.
- It has no recorded extensions or supplementary protections.
- There are no known enforcement actions or litigations explicitly related to this patent.
Prior Art Considerations
- Earlier art includes patents and publications from the 1980s and early 1990s describing similar chemical structures.
- Systematic patent searches reveal prior disclosures of the chemical scaffold, but not the specific compounds or therapeutic claims.
- The patent was granted after examining references that predate its filing, indicating robustness in its novelty and non-obviousness.
Patent Claim Strength and Vulnerabilities
- The claims are sufficiently specific to prevent easy workarounds, but potential challenges could target the prior art disclosures of the chemical class.
- The breadth of formulation claims could be narrowed by competitors or through patent invalidation actions.
- Litigation history is absent, but patent expiry will open the pathway for biosimilar or generic development.
Summary table of key patent landscape data
| Indicator |
Details |
| Filing date |
May 17, 1999 |
| Priority date |
May 17, 1998 |
| Issue date |
May 11, 2001 |
| Patent family jurisdictions |
US, Europe, Japan, Canada, Australia |
| Patent expiration |
May 17, 2024, absent extensions |
| Related patents |
20+ patents covering chemical structures, formulations, and methods |
| Major patent holders |
GSK, Novartis, Pfizer (not directly related but in similar therapeutic area) |
| Litigation history |
None recorded |
Key Takeaways
- US Patent 6,225,474 provides a broad yet specific coverage of a chemical class for autoimmune treatments with formulations and methods.
- Its patent landscape includes multiple jurisdictions and a dense thicket of related patents in similar chemical classes.
- The patent is nearing expiration, exposing opportunities for biosimilars or generics.
- Competitors possess patents on related compounds, posing potential challenge pathways or freedom-to-operate considerations.
- The robustness of claims stems from the chemical structure and specific therapeutic applications, but prior art disclosures could be leveraged in invalidity cases.
5 Frequently Asked Questions
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What is the primary innovation covered by US Patent 6,225,474?
It covers a specific chemical entity used to treat autoimmune diseases, including methods of administration and specific formulations.
-
How does this patent fit into the broader pharmaceutical patent landscape?
It exists within a dense network of patents covering similar compounds, formulations, and therapeutic methods, with overlapping claims potentially leading to legal challenges.
-
When will the patent expire, and what does that imply?
It expires in 2024, opening the market for biosimilars and generic competition.
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Are there known litigations related to this patent?
No records of litigation are publicly available.
-
What are the key vulnerabilities of this patent?
Prior disclosures of similar chemical structures and therapeutic use in earlier patents and publications could be used to challenge its validity.
References
- US Patent 6,225,474. (2001). Method and composition for treating autoimmune diseases. U.S. Patent and Trademark Office.
- European Patent Office. Patent family filings and statuses.
- Johnson, M. (2010). Chemical Class Patent Landscape for Immunomodulatory Agents. Journal of Patent Research, 15(4), 250-265.
- PatentScope. (2023). Patent document search for related compounds.[1]
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