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. 01, 2020
Filed:
Oct. 04, 2018
Ampac Fine Chemicals Llc, Rancho Cordova, CA (US);
William Dubay, Folsom, CA (US);
Alex Nichols, Madison, WI (US);
Wei Chen, Folsom, CA (US);
Alec Brozell, San Francisco, CA (US);
Ajay Ryerson, Sacramento, CA (US);
AMPAC FINE CHEMICALS LLC, Rancho Cordova, CA (US);
Abstract
A method for producing substantially pure levorphanol and related compounds, when compared to the conventional process, is provided. In particular, a method for producing substantially pure levorphanol tartrate dihydrate is described. Also described are compositions comprising levorphanol and related compounds, particularly compositions comprising levorphanol tartrate dihydrate, levomethorphan, and norlevorphanol in which the levomethorphan and norlevorphanol are present in the composition in reduced levels.