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:
Sep. 03, 1985
Filed:
Oct. 06, 1982
Applicant:
Inventors:
Assignee:
UBE Industries Ltd., Ube, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560204 ; 556 30 ; 556 13 ; 556 23 ; 556 21 ; 502162 ; 502164 ; 502200 ; 502213 ;
Abstract
Disclosed is an improved process for preparing diesters of malonic acid by subjecting ketene, carbon monoxide and an ester of nitrous acid to a liquid phase reaction in an organic solvent, in which the reaction is carried out in the presence of a catalyst of a platinum group metal complex represented by the formula: