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. 25, 1989
Filed:
Jul. 11, 1988
Applicant:
Inventor:
Waldo De Thomas, Parsippany, NJ (US);
Assignee:
GAF Corporation, Wayne, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ; C07D / ;
U.S. Cl.
CPC ...
203 35 ; 203 38 ; 203 88 ; 203 91 ; 203D / ; 549295 ;
Abstract
A process which comprises treating butyrolactone in at least 95% purity with an acid to convert and remove color forming impurities for product stabilization.