Storage stable topical pharmaceutical composition containing low dielectric solvents
CA 1208553 A · Owner: The Procter & Gamble Company · Inventors: Batt, Mary L.; Kozarek, William J.; Huggins, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
James Edson Huggins Mary Louise Batt, William Joseph Kozarek ABSTRACT OF THE DISCLOSURE, A storage stable topical pharmaceutical composition containing zinc erythromycin, particularly useful in the topical treatment of acne vulgaris, is disclosed. This composition contains a solvent having a dielectric constant, measured at 25°C, of from about 5.5 to about 15 preferably from about 8 to about 12, such as t-butanol to, impart storage stability to the zinc erythromycin component. The composition may additionally contain particularly selected pharmaceutically-acceptable nitrogencontaining stabilizer components, such as diisopropanolamine.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 29, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.