The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 1980
Filed:
Dec. 05, 1977
Hermann Seifert, Cologne, DE;
Helmut Waldmann, Leverkusen, DE;
Wulf Schwerdtel, Leverkusen, DE;
Wolfgang Swodenk, Odenthal, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
A process has been invented for the preparation of dihydric substituted phenols which comprises reacting a solution, which is essentially anhydrous and free from hydrogen peroxide, of a percarboxylic acid in an inert organic solvent with a monohydric substituted phenol, which is derived from benzene, naphthalene or anthracene and still contains at least one free hydrogen atom in the aromatic nucleus, at temperatures from about -20.degree. C. to about 120.degree. C. The dihydric substituted phenols obtained according to the invention are known, important industrial intermediate products used in the fields of photography, dyestuffs and plastics, as well as in the scent and flavoring areas.