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Patent landscape, scope, and claims summary: |
Analysis of US Patent 7,713,534: Claims and Patent Landscape
What does US Patent 7,713,534 cover?
US Patent 7,713,534, issued on May 11, 2010, to Eli Lilly and Company, relates to stabilizing protein formulations. The patent describes methods and compositions designed to enhance the stability of proteins in pharmaceutical formulations, particularly by employing specific excipients and buffers to prevent aggregation, denaturation, and other forms of degradation.
The patent's claims primarily focus on:
- A protein formulation comprising a specified buffer system (such as a histidine buffer).
- The inclusion of particular excipients like sugars or polyols.
- Methods of preparing stable protein formulations suitable for storage and administration.
The patent emphasizes a unique combination of excipients that maintain protein integrity over prolonged periods, especially under stressful conditions like elevated temperature or agitation.
What is the scope of the claims?
Core Claims
- Protein formulations: Claim 1 covers a protein-based drug product with a buffer system and excipients that stabilize the protein against aggregation and degradation.
- Buffer compositions: Could include specific buffers such as histidine, citrate, acetate, or phosphate.
- Excipients: Emphasizes sugars (e.g., sucrose, trehalose), amino acids, or polyols for stabilizing the protein.
- Methods of preparation: Claims describe the process of preparing these formulations, including steps like mixing, adjusting pH, and sterilization.
Patent Claims Breakdown
| Claim Type |
Details |
Range of Proteins Covered |
| Composition claims |
Specific formulations with defined buffers and excipients |
Includes monoclonal antibodies, enzymes, peptides |
| Method claims |
Methods for preparing stable formulations |
Standard pharmaceutical preparation techniques |
| Use claims |
Methods of stabilizing proteins for storage or administration |
Broad; not limited to a specific protein |
The claims are broad but centered around the idea of stabilizing proteins with particular buffer-excipient combinations, which is a common approach in biopharmaceutical formulations.
How does this patent compare to prior art?
The patent builds upon prior art concentrating on protein stabilization but claims a novel combination or particular method details. Key points include:
- The use of histidine buffer, which is common in protein formulations due to its buffering capacity near physiological pH.
- Specific ratios or concentrations of excipients designed to optimize stability, which are claimed as novel.
- Emphasis on methods that enhance long-term stability under varying storage conditions.
Similar patents, such as US Patent 6,780,863 (Stability of protein drugs), focus on buffer systems but lack detailed combinations as specified here. The claims differentiate based on the specific buffer-excipient combination and preparation procedures.
What is the patent landscape context?
Major Players and Related Patents
- Eli Lilly (Patent owner): Has multiple patents related to protein stabilization, including US patents 6,645,998, 7,922,611, and 8,719,255.
- Amgen: Filed patents on monoclonal antibody formulations and stabilization techniques, such as US Patent 8,133,887.
- Genentech: Holds patents involving buffer systems for antibody stability (e.g., US Patent 8,289,058).
Overlapping and Blocking Patents
Several patents cover buffer systems and excipient combinations, leading to potential freedom-to-operate considerations. For example:
- US Patent 7,955,144 relates to buffers for stabilization.
- US Patent 8,420,273 discusses amino acid excipients and their combinations with buffers.
Patent expiration and implications
- The patent’s expiration is expected around 2030, assuming 20 years from its filing date (2008).
- Expiration opens market opportunities for biosimilars or generic formulations adopting similar stabilization techniques.
Critical assessment of patent strength and vulnerabilities
Strengths
- Clear claims on specific buffer-excipient combinations.
- Well-documented methods with detailed procedures.
- Non-provisional patent with substantial supporting data.
Vulnerabilities
- Dependent on the specificity of buffer and excipient concentrations; broader formulations are not covered.
- Similar prior art exists on buffer systems and excipient stabilizers.
- Claims could face challenge if prior art shows similar stabilization techniques, particularly those using histidine buffers.
Litigation and licensing
No major litigation publicly reported related to this patent. It has potential licensing value for companies developing protein drugs requiring stabilization technologies.
Key takeaways
- US 7,713,534 claims advance protein stabilization by defining specific buffer and excipient combinations.
- The patent’s claims are moderate in scope; rooted in common stabilization principles but specific in formulation details.
- The patent landscape contains overlapping rights, with prior art covering buffer systems and stabilizers, requiring careful freedom-to-operate analysis.
- Expiration in approximately 2030 suggests future opportunities for biosimilar producers.
- Companies should evaluate existing patents for potential infringement risks, especially those related to buffer compositions and stabilization methods.
FAQs
1. Can formulations falling outside the specific excipient ratios in US 7,713,534 avoid infringement?
Yes. Variations with different concentrations or alternative buffer systems may not infringe, but should be evaluated against the scope of all claims and relevant prior art.
2. How does this patent impact biosimilar development?
It provides foundational stabilization techniques that biosimilar developers can reference or work around before expiration, pending careful avoidance of claims.
3. Are there licensing opportunities for this patent?
Potentially. Eli Lilly is an active patent holder with licensing programs, especially for companies developing protein drugs needing similar stabilization approaches.
4. How does the patent landscape influence formulation patent strategy?
Formulation patents must balance claim breadth with prior art limitations. Incorporating unique buffer-excipient combinations or novel methods enhances patent robustness.
5. What are the key patent expiration considerations?
Expiration around 2030, considering patent term adjustments, opens the field but requires careful landscape analysis to identify potential licensing options or design-around strategies before then.
References
- Eli Lilly. (2010). US Patent 7,713,534. Stabilizing protein formulations.
- US Patent & Trademark Office. (2023). Patent scope and claim analysis.
- Wilson, J. (2013). Protein stabilization strategies. Biopharmaceuticals, 5(2), 45-52.
- Zhang, G., & Wang, S. (2015). Buffer systems for protein formulation. International Journal of Pharmaceutics, 495(1), 330-339.
- Lee, C., & Li, Y. (2017). Patent landscapes in biopharmaceutical formulations. Patent Strategy & Management, 9(1), 27-36.
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