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Last Updated: December 12, 2025

Claims for Patent: 4,017,615

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Summary for Patent: 4,017,615

Title:	Propylene carbonate ointment vehicle
Abstract:	An ointment vehicle containing from 0.5 to 30 percent propylene carbonate, from 30 to 99.5 weight percent petrolatum and/or polysiloxane, compatible cosolvent, the concentration of which in combination with propylene carbonate is from 0.5 to 70 percent, and, optionally, surfactants, thickeners, preservatives, and penetrants. This ointment is a suitable vehicle for all types of therapeutic agents for topical application including antibiotics, steroids, antihistamines, antiseptics, anesthetics, antibacterials, fungicides and the like, and has shown particular advantages with anti-inflammatory topical corticoids.
Inventor(s):	Subramaniam Shastri, Zafaruzzaman I. Shaikh
Assignee:	Syntex Pharmaceuticals International Ltd
Application Number:	US05/639,740
Patent Claims:

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