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. 10, 1991
Filed:
Sep. 13, 1990
Guo-shuh J Lee, Midland, MI (US);
V Rao Durvasula, Lake Jackson, TX (US);
Kirk D Anderson, Brazoria, TX (US);
Louis N Moreno, Lake Jackson, TX (US);
Nirad N Shah, Lake Jackson, TX (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A catalytic intermediate useful in the preparation of ortho-alkylated aromatic amines is prepared by heating an amine in the presence of aluminum metal, zinc metal and aluminum chloride. This catalytic intermediate is used to alkylate aromatic amines which may be the same as or different from the amine used in the catalytic intermediate preparation. In a preferred embodiment, toluenediamine is alkylated in the ortho positions to form diethyltoluenediamine.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile