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:
Dec. 14, 2010
Filed:
Oct. 03, 2007
Applicants:
Jen-sen Dung, Boothwyn, PA (US);
Erno M. Keskeny, Wilmington, DE (US);
James J. Mencel, North Wales, PA (US);
Inventors:
Jen-Sen Dung, Boothwyn, PA (US);
Erno M. Keskeny, Wilmington, DE (US);
James J. Mencel, North Wales, PA (US);
Assignee:
Johnson Matthey Public Limited Compnay, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 31/485 (2006.01); C07D 489/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
Improved analgesic oxymorphone hydrochloride contains less than 10 ppm of alpha, beta unsaturated ketones and pharmaceutical preparations comprising such oxymorphone hydrochloride. The oxymorphone hydrochloride is produced by reducing a starting material oxymorphone hydrochloride using gaseous hydrogen and under specified acidity, solvent system and temperature conditions. A specific polymorph of oxymorphone hydrochloride may be obtained by hydration.