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:
Jul. 09, 1996
Filed:
Dec. 29, 1994
Tsurahide Cho, Tokyo, JP;
Takaaki Tamura, Kawasaki, JP;
Toshitsura Cho, Tokyo, JP;
Kazumi Suzuki, Kawasaki, JP;
Tama Chemicals Co., Ltd., Tokyo, JP;
Moses Lake Industries, Inc., Moses Lake, WA (US);
Abstract
This invention relates to a process for preparing dialkyl carbonates by the reaction of one kind or a mixture of two or more kinds selected from urea, methyl carbamate and ethyl carbamate with methanol and/or ethanol in the presence of a catalyst under pressure at 100.degree. to 250.degree. C. and the process does not use poisonous phosgene or carbon monoxide as raw material and readily yields dimethyl carbonate and diethyl carbonate in simple equipment.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile