United States Patent 4,017,615: A Detailed Analysis of Scope, Claims, and Patent Landscape
Introduction
United States Patent 4,017,615, titled "Propylene Carbonate Ointment Vehicle," was granted on April 5, 1977. This patent pertains to the development of ointment bases for topical applications, specifically utilizing propylene carbonate as a key component. Here, we will delve into the scope, claims, and the broader patent landscape surrounding this invention.
Background and Invention Overview
The patent is a division of application U.S. Ser. No. 85,246, filed on October 29, 1970. The invention focuses on creating an ointment vehicle that incorporates propylene carbonate, a compound known for its solvent properties and compatibility with various active ingredients. This innovation aimed to improve the efficacy and stability of topical ointments.
Scope of the Patent
Technical Field
The patent falls within the technical field of pharmaceutical formulations, specifically ointment vehicles. It addresses the need for a stable and effective base that can be used in a variety of topical applications.
Key Components
The scope of the patent centers around the use of propylene carbonate as the primary solvent in the ointment vehicle. Other components may include additional solvents, emollients, and active pharmaceutical ingredients.
Claims Analysis
Independent Claims
The patent includes several independent claims that define the scope of the invention. Here are some key aspects:
- Claim 1: This claim describes the ointment vehicle comprising propylene carbonate as the primary solvent, along with other optional components such as emollients and active ingredients.
- Claim 2: This claim specifies the concentration of propylene carbonate in the ointment vehicle, typically ranging from 50% to 90% by weight.
- Claim 3: This claim details the method of preparing the ointment vehicle, including the steps of mixing propylene carbonate with other ingredients and ensuring the stability of the formulation.
Dependent Claims
Dependent claims further narrow down the scope by specifying particular combinations of ingredients, their proportions, and the methods of preparation.
Patent Landscape
Prior Art
The patent cites several prior art references related to ointment vehicles and solvent systems. For example, prior art keywords include hydrogen, fluoro, hydroxy, and chloro compounds, which were used in various ointment formulations before the invention[5].
Related Patents
Other patents in the same field often focus on different solvents or formulations. For instance, patents related to ointment vehicles might use alternative solvents like glycerin or mineral oil. The unique use of propylene carbonate in this patent distinguishes it from other related inventions.
International Patent Landscape
To understand the global impact, it is essential to look at international patent databases such as those provided by the European Patent Office (EPO), Japan Patent Office (JPO), and the World Intellectual Property Organization (WIPO). These databases can reveal whether similar inventions have been patented in other countries and how they compare to U.S. Patent 4,017,615[4].
Practical Applications and Impact
Pharmaceutical Industry
The invention has practical applications in the pharmaceutical industry, particularly in the development of topical treatments. The stability and efficacy of the propylene carbonate ointment vehicle make it a valuable contribution to the field.
Real-World Use
In real-world applications, this ointment vehicle can be used in a variety of products, such as skin creams, ointments for wound care, and other topical medications. The use of propylene carbonate enhances the solubility and delivery of active ingredients, improving the overall effectiveness of the treatment.
Legal and Regulatory Considerations
Patent Status
The patent has expired, which means that the invention is now in the public domain. This allows other manufacturers to use the propylene carbonate ointment vehicle without infringing on the original patent.
Regulatory Compliance
Any new formulations using propylene carbonate must comply with current regulatory standards, including those set by the FDA and other relevant authorities. This involves ensuring the safety, efficacy, and stability of the final product.
Conclusion
United States Patent 4,017,615 represents a significant innovation in the field of pharmaceutical formulations. The use of propylene carbonate as an ointment vehicle has practical applications and has contributed to the development of more effective topical treatments.
Key Takeaways
- Invention Overview: The patent describes an ointment vehicle using propylene carbonate as the primary solvent.
- Scope and Claims: The patent includes independent and dependent claims that define the composition and preparation method of the ointment vehicle.
- Patent Landscape: The invention is distinct from prior art and related patents, with a unique focus on propylene carbonate.
- Practical Applications: The invention has significant practical applications in the pharmaceutical industry, enhancing the efficacy of topical treatments.
- Legal and Regulatory Considerations: The patent has expired, and any new formulations must comply with current regulatory standards.
FAQs
Q: What is the primary component of the ointment vehicle described in U.S. Patent 4,017,615?
A: The primary component is propylene carbonate.
Q: What is the significance of propylene carbonate in this patent?
A: Propylene carbonate is used as a solvent to enhance the stability and efficacy of the ointment vehicle.
Q: Has the patent expired?
A: Yes, the patent has expired and is now in the public domain.
Q: What are the potential applications of this ointment vehicle?
A: The ointment vehicle can be used in various topical treatments, such as skin creams and wound care products.
Q: Are there any regulatory considerations for using this ointment vehicle?
A: Yes, any new formulations must comply with current regulatory standards set by authorities like the FDA.
Sources
- US4017615A - Propylene carbonate ointment vehicle - Google Patents
- Search for patents - USPTO
- Patent Claims and Patent Scope - SSRN
- U.S. Patent Small Claims Court - ACUS
- US4017615A - Propylene carbonate ointment vehicle - Google Patents
