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:
Apr. 19, 1988
Filed:
Sep. 04, 1986
Applicant:
Inventor:
Chong-Kuang Shaw, Broadview Heights, OH (US);
Assignee:
The B. F. Goodrich Company, Akron, OH (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564409 ;
Abstract
Ortho-para-alkylated diphenylamines are prepared utilizing an improved, one-stage process wherein the diphenylamines are ortho-alkylated by reaction with a first olefin in the presence of an aluminum complex as the catalyst, and are subsequently para-alkylated by reaction with a second olefin using a Friedel-Crafts aluminum catalyst. The para-alkylation is carried out without prior isolation or solvent washing of the ortho-alkylated diphenylamine intermediates.
Shaw, Chong-Kuang. (1988). Process for otho- and para-alkylating diphenylamines (U.S. Patent No. 4739121). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4739121
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile