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. 19, 1989
Filed:
Jul. 25, 1988
Applicant:
Inventors:
Dario R Cova, Kirkwood, MO (US);
John M Thorman, Chesterfield, MO (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ; C07C / ;
U.S. Cl.
CPC ...
203 28 ; 203 14 ; 203 67 ; 203 69 ; 203 72 ; 203 73 ; 203 80 ; 203D / ; 203D / ; 560177 ; 560186 ; 562577 ;
Abstract
There is disclosed an improved process for the manufacture of glyoxylic acid obtained by oxidation of glycolic acid. For processing purposes alkyl esters of these acids are employed. Increased efficiency is obtained by recovering glycolate rich streams from one or more distillation operations and after treatment to remove acetic acid by-product the streams are recycled to the oxidation reaction.
Cova, Dario. (1989). Purification of alkyl glyoxylate (U.S. Patent No. 4867849). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4867849
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile