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. 16, 1996
Filed:
Dec. 12, 1994
Applicant:
Inventors:
Michael Kopietz, Grunstadt, DE;
Alan Handerman, Asheville, NC (US);
Simon Jones, Leimen, DE;
Ulrich Kalck, Neuhofen, DE;
Claus-Ulrich Priester, Ludwigshafen, DE;
Heinz Auer, Neulussheim, DE;
Josef Ritz, Ludwigshafen, DE;
Hugo Fuchs, Ludwigshafen, DE;
Paul Pijl, Frankenthal, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540540 ; 540485 ;
Abstract
Caprolactam is obtained from caprolactam-containing polymers in the presence of a base under reduced pressure by depolymerizing polymers which contain the repeating unit --[--N(H)--(CH.sub.2).sub.5 --C(O)--] or mixtures consisting essentially of