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:
Feb. 10, 1976
Filed:
Apr. 02, 1974
Applicant:
Inventors:
Richard N Knowles, Hockessin, DE (US);
Earl P Moore, Jr, Hockessin, DE (US);
Assignee:
E. I. Du Pont de Nemours & Co., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260192 ; 260208 ; 260 / ;
Abstract
After an azonitrile is prepared by coupling an aminonitrile in the presence of a hypochlorite, the reaction mixture is acidified to a pH of 4 or less and an alkali metal, alkaline earth metal or quaternary ammonium nitrite, sulfite, bisulfite or thiosulfate, sulfur dioxide, nitrogen oxide, oxalic acid, formaldehyde or hydroxylamine is added as a reducing agent.
Knowles, Richard. (1976). Process for preparing higher purity azo compounds (U.S. Patent No. 3937696). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3937696
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile