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. 30, 2012
Filed:
Nov. 04, 2009
Greg S. Buenger, Charles City, IA (US);
Paul A. Jass, Charles City, IA (US);
Kezia Peixoto Schutz, Charles City, IA (US);
Greg S. Buenger, Charles City, IA (US);
Paul A. Jass, Charles City, IA (US);
Kezia Peixoto Schutz, Charles City, IA (US);
Cambrex Charles City, Charles City, IA (US);
Abstract
The present invention relates to a process for the preparation of piperidine derivatives including sufentanil, and their pharmaceutically acceptable salts, such as the citrate salt in which a quaternary ammonium (nosylate) salt of an appropriate piperidine is reacted with a corresponding 4-NOsulfonate ester to produce the desired piperidine derivative at a high purity.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile