Patent number: 4234599
Abstract: Preventive as well as therapeutic treatment to alleviate the symptoms of skin keratoses consisting of topical application of a solution, gel, lotion, cream or ointment containing one or more of the .alpha.- or .beta.-hydroxy acids or .alpha.-keto acids, esters thereof, and their amine salts is disclosed. The compounds include free acid or amine salt forms of .alpha.-hydroxy-butyric acid, .alpha.-hydroxyisobutyric acid, .alpha.-hydroxyisocaproic acid, .alpha.-hydroxyisovaleric, atrolactic acid, .beta.-hydroxybutyric acid, .beta.-phenyl lactic acid, .beta.-phenylpyruvic acid, citric acid, ethyl pyruvate, galacturonic acid, glucoheptonic acid, glucoheptono 1,4-lactone, gluconic acid, gluconolactone, glucuronic acid, glucuronolactone, glycolic acid, isopropyl pyruvate, lactic acid, malic acid, mandelic acid, methyl pyruvate, mucic acid, pyruvic acid, saccharic acid, saccharic acid 1,4-lactone, tartaric acid, and tartronic acid.
Type:
Grant
Filed:
October 4, 1978
Date of Patent:
November 18, 1980
Inventors:
Eugene J. Van Scott, Ruey J. Yu