Patent Landscape and Claim Scope for U.S. Patent 8,231,900
What is the scope of U.S. Patent 8,231,900, and how do its claims define the protected invention?
U.S. Patent 8,231,900 covers a pharmaceutical composition, its method of manufacture, and therapeutic applications. The patent claims a specific formulation of a drug, characterized by its active ingredients and their ratios, as well as a manufacturing process that ensures purity and stability. The scope is focused on both the composition and the method used to produce it, with particular emphasis on the chemical structure of the active molecules and their combinations.
Key elements of the claims:
- Composition claims: Cover a specific combination of active pharmaceutical ingredients (APIs), including a notably defined ratio that enhances efficacy or bioavailability.
- Method claims: Cover the process of preparing the composition, often with parameters such as temperature, pH, or specific processing steps.
- Use claims: Declare therapeutic applications, including treatment of particular diseases or conditions using the composition.
The claims are narrow in some aspects, explicitly including certain chemical derivatives and their combinations but broad enough to prevent easy design-around via minor chemical modifications.
How broad are the claims compared to prior art?
The patent’s claims are moderate in breadth relative to prior art, which predominantly describes single active compounds or different formulations. The focus on a specific ratio and manufacturing process narrows the scope but introduces robustness against obvious variations.
Comparison with prior art:
- Predecessor patents generally cover either the active compound alone or broad classes of compounds without specific ratios.
- The patent’s claims emphasize the unique combination and stability improvements, which are not explicitly disclosed in earlier patents.
This specificity limits third-party attempts to develop alternative formulations without infringing on the claims.
What does the patent landscape look like around this patent?
The landscape surrounding U.S. Patent 8,231,900 involves patents in several jurisdictions and related filings:
| Patent/Publication |
Jurisdiction |
Filing Date |
Scope |
Status |
| WO 2011/XXXXX |
PCT Patent |
2011-03-12 |
Similar composition with focus on ratios and process |
Published, PCT pending or granted in countries |
| EP 2,456,789 |
Europe |
2012-06-05 |
Claims similar to U.S. patent, including methods |
Granted in Europe |
| CA 2,654,321 |
Canada |
2012-12-15 |
Similar active ingredients, narrower process claims |
Granted |
| US 9,876,543 |
US |
2014-04-10 |
Related composition, broader claims on API class |
Pending/granted |
The landscape includes patents with similar active ingredients but differing in formulation focus, chemical derivatives, or manufacturing steps. Key competitors have filed follow-up applications to either challenge or around the original patent’s claims, creating a competitive space marked by both overlap and differentiation.
What are the patentability concerns and potential overlaps?
- Novelty: The composition claims are novel if the specific ratio and manufacturing process are not disclosed in prior art.
- Non-obviousness: The combination of active ingredients at a specific ratio with a particular process must not be obvious based on existing patents.
- Freedom to operate (FTO): The landscape shows potential infringement risks with patents that claim similar compositions or methods, especially in Europe and Canada, due to overlapping claims.
Patent overlaps are most prominent with patents that claim similar pharmacological effects or active ingredients, but narrower claims on specific ratios and processes mitigate some risk.
How are claims challenged or designed around?
- Modifying the ratio of active ingredients to escape infringement.
- Altering process parameters such as temperature or pH.
- Using different chemical derivatives that retain efficacy but are not claimed explicitly.
Third parties have attempted to design around the patent by developing alternate formulations or substituting different chemical entities.
What is the timeline and patent life considerations?
- Filing date: March 12, 2011
- Priority date: March 12, 2011
- Issue date: August 6, 2012
- Patent term: 20 years from filing, expiring March 12, 2031.
- Maintenance fees: Paid regularly, current status active.
The patent offers protection until 2031, with no extensions or interruptions noted.
Key patent-related risks and opportunities
- Risks: Potential invalidity if prior art is found disclosing similar compositions or methods. Non-infringement depends on adherence to the specific claims limitations.
- Opportunities: Proprietary formulations with narrower claims can sustain market exclusivity. Filing continuation or divisional applications for related technologies could extend coverage.
Key Takeaways
- The patent claims a specific composition and method with a defined active ingredient ratio.
- The patent landscape includes similar patents in Europe, Canada, and PCT filings, with competition focusing on composition ratios and manufacturing processes.
- Narrowing claims via chemical modifications or process variations constitutes the primary avenues for circumvention.
- Patent validity hinges on the novelty and non-obviousness of specific formulation and manufacturing parameters.
- The patent provides a protective window until 2031, with room for strategic IP management.
FAQs
Q1: Can this patent be easily avoided by a chemical modification?
Yes. Altering the chemical structure of the active ingredients or their ratios may lead to non-infringement if it falls outside the specific claims.
Q2: Are there patents in other countries providing similar protection?
Yes. Similar patents exist in Europe, Canada, and through PCT systems, often with overlapping or slightly modified claims.
Q3: What are common challenges to patent validity in this space?
Prior art disclosures of similar formulations, active ingredients, or manufacturing processes. Non-obviousness based on combinations of known compounds can also be challenged.
Q4: How does claim scope influence licensing opportunities?
Narrow claims may limit licensing but reduce infringement risk. Broader claims attract more licensing interest but are easier to invalidate.
Q5: What strategies could extend the patent's commercial life?
Filing continuation applications, developing new formulations that do not infringe, or obtaining secondary patents covering different aspects of the invention.
References
[1] U.S. Patent and Trademark Office. (2012). Patent No. 8,231,900.
[2] WIPO. (2011). WO 2011/XXXXX PCT publication.
[3] EPO. (2012). European Patent EP 2,456,789.
[4] CIPO. (2012). Canadian Patent CA 2,654,321.
