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. 26, 1983
Filed:
Dec. 01, 1980
Koichi Takeuchi, Yokohama, JP;
Katsuharu Miyata, Yokohama, JP;
Mitsui Toatsu Chemicals, Incorporated, Tokyo, JP;
Abstract
A polymethylene polyphenyl polyisocyanate composition comprising polymethylene polyphenyl polyisocyanates, a part of the isocyanate groups contained therein being substituted by a carbamate group, or said polymethylene polyphenyl polyisocyanates having the substituted carbamate group and polymethylene polyphenyl polyisocyanate not having carbamate group. The total amount of the carbamate groups contained in the composition is up to 10 percent by mole based on the total amount of isocyanate groups contained in the composition. The composition is useful for the preparation of rigid polyurethane which has many industrial applications. A process for the preparation of the composition is also disclosed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile