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:
Mar. 22, 1983
Filed:
Mar. 05, 1982
Applicant:
Inventors:
Steven L Trenbeath, Fairfield, CT (US);
Allan M Feldman, Norwalk, CT (US);
Laurence J Nummy, Stamford, CT (US);
Assignee:
American Cyanamid Company, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2604 / ;
Abstract
A process for producing aromatic mono- and polyisocyanates by the addition reaction of isocyanic acid with vinyl aromatics is disclosed. The process is characterized by the slow addition of the olefin to a reaction mass of solvent and isocyanic acid to maintain the isocyanic acid in high excess to unreacted olefin.