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:
Dec. 25, 1990
Filed:
Dec. 16, 1988
Applicant:
Inventors:
Yuh-Guo Pan, Stamford, CT (US);
Lana L Hochman, Fairfield, CT (US);
Assignee:
Clairol Incorporated, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
564414 ; 564390 ; 564443 ; 568767 ;
Abstract
The conversion of ortho-hydroxylated Mannich bases to the corresponding methylated compounds, e.g., cresols, can be effectively carried out using a novel hydrogenation technique.