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:
Jan. 25, 2011
Filed:
Dec. 04, 2007
Applicants:
D. Phillip Cox, Audubon, PA (US);
Yong Zhang, Bogart, GA (US);
Inventors:
D. Phillip Cox, Audubon, PA (US);
Yong Zhang, Bogart, GA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 489/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention is directed to a process for using n-butanol to prepare an oxycodone base compositions having reduced levels of impurities such as 14-hydroxycodeinone and DHDHC.