Enhanced Hydrocortisone Sodium Phosphate Formulation for Topical Application

Publication ID: 24-11857555_0001_PTD
Published: October 28, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced Hydrocortisone Sodium Phosphate Formulation for Topical Application,” Published Technical Disclosure No. 24-11857555_0001_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857555_0001_PTD
This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,555.

Summary of the Inventive Concept

The inventive concept relates to an optimized pharmaceutical formulation of hydrocortisone sodium phosphate and monothioglycerol, designed to improve skin penetration, stability, and efficacy for treating allergic reactions and inflammatory skin conditions.

Background and Problem Solved

The original patent disclosed an aqueous pharmaceutical formulation of hydrocortisone sodium phosphate and monothioglycerol. However, this formulation has limitations, such as limited skin penetration, potential instability, and variable efficacy. The new inventive concept addresses these limitations by introducing novel enhancements to the formulation, including optimized pH-adjusted buffer systems, novel preservative combinations, and improved bioavailability.

Detailed Description of the Inventive Concept

The inventive concept comprises a pharmaceutical formulation of hydrocortisone sodium phosphate and monothioglycerol, wherein the formulation is optimized for enhanced skin penetration through the use of a pH-adjusted buffer system, stabilized with a novel combination of preservatives, and designed for rapid dissolution to improve bioavailability. The formulation can be administered topically using a device for simultaneous injection or a dual-chamber container for co-administration. The inventive concept also encompasses a method for treating allergic reactions and inflammatory skin conditions using the optimized formulation.

Novelty and Inventive Step

The new claims introduce novel and non-obvious improvements to the original formulation, including the use of pH-adjusted buffer systems, novel preservative combinations, and optimized bioavailability. These enhancements provide a significant advance over the original patent, addressing the limitations of skin penetration, stability, and efficacy.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept may include varying the concentration of hydrocortisone sodium phosphate and monothioglycerol, using different preservative combinations, or incorporating additional ingredients to enhance skin penetration and efficacy. Variations of the device for topical application or the dual-chamber container may also be explored to improve user convenience and ease of use.

Potential Commercial Applications and Market

The inventive concept has significant commercial potential in the pharmaceutical industry, particularly in the treatment of allergic reactions and inflammatory skin conditions. The optimized formulation and novel administration methods may provide a competitive advantage in the market, offering improved efficacy, convenience, and patient outcomes.

Field of Art

Pharmaceutical formulations, specifically aqueous pharmaceutical compositions for corticosteroid delivery, with expertise in drug stability, concentration optimization, and topical/injectable delivery systems

Person of Ordinary Skill (PHOSITA) Profile

A pharmaceutical formulation scientist with advanced degree in pharmaceutical chemistry, experience in drug delivery systems, understanding of excipient interactions, buffer systems, and topical/injectable drug formulation techniques

Obviousness Rationale

A person having ordinary skill would recognize that the PTD's variations represent predictable engineering modifications to the source patent's hydrocortisone sodium phosphate formulation. The disclosed enhancements in skin penetration, buffer system optimization, and delivery mechanisms are logical extensions of known pharmaceutical formulation strategies. These variations would be considered routine optimization within the standard problem-solving approach of pharmaceutical development.

Obvious Combinations & Variations

Source Patent Element
Aqueous pharmaceutical formulation with specific hydrocortisone sodium phosphate concentration ranges
PTD Variation
pH-adjusted buffer system to improve stability and efficacy
Obviousness Reasoning
Buffer system modifications are a standard technique for improving drug stability, and a PHOSITA would find it obvious to adjust pH to enhance pharmaceutical performance
Source Patent Element
Hydrocortisone sodium phosphate and monothioglycerol composition
PTD Variation
Dual-chamber container for co-administration
Obviousness Reasoning
Separate storage and simultaneous delivery are known pharmaceutical engineering solutions for maintaining ingredient stability prior to administration
Source Patent Element
Topical and injectable corticosteroid formulation
PTD Variation
Enhanced skin penetration optimization techniques
Obviousness Reasoning
Improving drug penetration through skin is a well-established goal in pharmaceutical development, using known techniques like excipient selection and concentration adjustment
Source Patent Element
Specific concentration ranges of hydrocortisone sodium phosphate
PTD Variation
Novel preservative combinations to improve formulation stability
Obviousness Reasoning
Preservative selection is a routine optimization process for pharmaceutical formulations, with predictable outcomes based on established chemical compatibility principles
Source Patent Element
Inflammatory condition treatment formulation
PTD Variation
Device for simultaneous injection and topical application
Obviousness Reasoning
Multi-mode drug delivery devices are common in pharmaceutical engineering, representing a predictable design solution for improving patient administration
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857555, the variations disclosed herein would be considered obvious to a person having ordinary skill in pharmaceutical formulation art. The incremental improvements in delivery mechanism, stability optimization, and penetration enhancement represent routine engineering modifications that do not rise to the level of non-obvious innovation, thus rendering potential derivative claims anticipated and obvious under 35 U.S.C. ยง 103.

Original Patent Information

Patent NumberUS 11,857,555
TitleAqueous pharmaceutical formulation of hydrocortisone sodium phosphate and monothioglycerol
Assignee(s)Antares Pharma, Inc.