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:
Aug. 04, 1998
Filed:
Sep. 30, 1997
Applicant:
Inventors:
Toyokazu Yagii, Hiroshima, JP;
Teruo Itokazu, Hiroshima, JP;
Kenji Oka, Hiroshima, JP;
Yasutaka Tanaka, Hyogo, JP;
Hidetaka Kojima, Hyogo, JP;
Assignee:
Daicel Chemical Industries, Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560345 ; 560158 ;
Abstract
An aliphatic diisocyante compound is prepared in a high yield by reacting dimethyl carbonate with an aliphatic diamine in the presence of an alkali catalyst to produce a corresponding urethene compound; and, within 48 hours after the completion of the preparation of the urethane compound, thermally decomposing the urethane compound under a reduced pressure of 1 to 700 Torr in a high-boiling-point solvent.
Yagii, Toyokazu. (1998). Process for preparation of aliphatic diisocyanate compounds (U.S. Patent No. 5789614). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5789614
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile