Reversible gel compositions of polyvinyl alcohol and substituted hydroxy aromatic compounds and their preparation

摘要: UNITED STATES PATENT OFFICE 2,249,538 REVERSIBLE GEL COMPOSITIONS OF POLYVINYL ALCOHOL AND SUBSTITUTED HYDROXY AROMATIC COMPOUNDS THEIR PREPARATION Wendell H. McDowell and William O. Kenyon, Rochester, N. Y., assignors to Eastman Kodak Company, a corporation of New Jersey...