Ascorbic acid composition and transdermal administration method
Patent 5308621 Issued on May 3, 1994. Estimated Expiration Date: November 21, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
The present invention concerns a composition for topical application to deliver ascorbic acid by transdermal migration. The composition includes fine particulate ascorbic acids suspended in a pharmaceutically acceptable carrier. The invention also concerns methods of treatment, involving such a composition.
Other References
Bulletin Officiel De La Propriete Industrielle 2,209,544, Published Dec. 7, 1973 (Syntex, U.S.A. Inc.) p. 11868
Journal of Pharmaceutical Sciences, vol. 75, No. 3, Mar. 1986; Effect of Particle Dissolution Rate on Ocular Drug Bioavailability; Hui et al
Patel U. and Banskar U., I1 Pharmaco, vol. 45, No. 5, pp. 559-568, (Exhibit A
November 21, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
