Method for the treatment of aging or photo-damaged skin
Patent 4938969 Issued on July 3, 1990. Estimated Expiration Date: 
November 14, 2008. 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.
November 14, 2008. 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.Patent ReferencesComposition for regenerating the collagen of connective skin tissue and a process for its preparation Cosmetic lotion Skin care composition Patent #: 4743442 InventorsAssigneeApplicationNo. 271213 filed on 11/14/1988US Classes:424/642, For topical application424/641, Zinc514/474, Ascorbic acid or derivative (e.g., vitamin C, etc.)514/567, Benzene ring nonionically bonded514/847Facial moisturizerExaminersPrimary: Robinson, Douglas W.Assistant: Henley, III, Raymond Attorney, Agent or FirmInternational ClassesA61K 033/32A61K 031/34 A61K 031/195 AbstractA composition for reducing the depth or intensity of fine wrinkles in skin affected by intrinsic or photo-induced aging is described. The topical formulation comprises in combination ascorbic acid, tyrosine and a non-toxic zinc salt and is preferably formulated in a hydrophilic ointment or cream base.Other References
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