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:
Nov. 29, 1977
Filed:
Dec. 12, 1975
Applicant:
Inventor:
George Kletecka, Rocky River, OH (US);
Assignee:
The B. F. Goodrich Company, Akron, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260576 ;
Abstract
An improved method for the reaction of .beta.-naphthol with p-phenylenediamine to produce N,N'-di-2-naphthyl-p-phenylenediamine at lower temperatures and with decreased formation of undesirable by-products is accomplished by reacting with said materials in the presence of boric anhydride or boric acid.