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. 20, 1993
Filed:
Jan. 13, 1992
Applicant:
Inventors:
Kryn G Ihrman, Baton Rouge, LA (US);
Olan W Mitchell, Glen Carbon, IL (US);
R Woodrow Wilson, Jr, Baton Rouge, LA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01S / ;
U.S. Cl.
CPC ...
502155 ; 502167 ;
Abstract
Production of alkyl substituted aromatic diamines by reacting triethlyaluminum with an aromatic diamine and a chloride ion source in the presence of an olefin is disclosed. The alkyl substituted aromatic diamines are useful as chain extenders in polyurethane processes.
Ihrman, Kryn. (1993). Process for alkylation of aromatic diamines (U.S. Patent No. 5204307). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5204307
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile