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. 11, 1992
Filed:
Jun. 28, 1990
Applicant:
Inventors:
Harold E Bellis, Wilmington, DE (US);
Kamlesh K Bhatia, Newark, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
549274 ; 549267 ; 549296 ; 549319 ;
Abstract
A continuous catalyzed vapor phase process for the production of dimeric cyclic esters which comprises converting the corresponding alpha-hydroxy-carboxylic acid or ester in the vapor phase over a solid catalyst, such as a silica-alumina, preferably a silica-alumina having a high silica content, in the presence of a carrier of gas.
Quick Actions:
Bellis, Harold. (1992). Continuous catalyzed vapor phase dimeric cyclic ester process (U.S. Patent No. 5138074). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5138074
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile