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. 31, 1999
Filed:
Feb. 05, 1998
Applicant:
Inventors:
Udo Jegelka, Recklinghausen, DE;
Guenter Kreilkamp, Langehegge, DE;
Assignee:
Huels Atiengesellschaft, Marl, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546244 ; 502337 ;
Abstract
N-monosubstituted 4-aminopiperidine is prepared by a process comprising, in a single stage, continuously passing a 4-oxopiperidine and a primary amine over a metal hydrogenation catalyst under a hydrogen partial pressure of 1-500 bar at a LHSV of up to 1 hr.sup.-1.