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:
Oct. 17, 1995
Filed:
Mar. 04, 1994
Applicant:
Inventors:
Thomas P Losier, Lake Jackson, TX (US);
Donald R Johnson, Lake Jackson, TX (US);
Hugo Fuchs, Ludwigshafen, DE;
Gerald Neubauer, Weinheim, DE;
Josef Ritz, Ludwigshafen, DE;
Assignee:
BASF Corporation, Mt. Olive, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
203 34 ; 159 473 ; 203 14 ; 203 35 ; 203 73 ; 203D / ; 540540 ;
Abstract
A process for the purification of caprolactam from crude caprolactam by distilling the crude caprolactam in the presence of an anorganic or organic acid.