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. 13, 2015
Filed:
Jul. 02, 2013
Applicant:
United Therapeutics Corporation, Silver Spring, MD (US);
Inventors:
Hitesh Batra, Herndon, VA (US);
Sudersan M. Tuladhar, Silver Spring, MD (US);
Raju Penmasta, Herndon, VA (US);
David A. Walsh, Palmyra, VA (US);
Assignee:
United Therapeutics Corporation, Silver Spring, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/08 (2006.01); C07C 405/00 (2006.01); C07C 51/41 (2006.01); C07C 213/08 (2006.01); A01N 37/10 (2006.01); C07C 39/12 (2006.01); C07C 39/17 (2006.01); C07C 59/60 (2006.01); C07C 59/72 (2006.01);
U.S. Cl.
CPC ...
C07C 405/0075 (2013.01); C07C 51/08 (2013.01); C07C 51/41 (2013.01); C07C 51/412 (2013.01); C07C 213/08 (2013.01); A01N 37/10 (2013.01); C07C 39/12 (2013.01); C07C 39/17 (2013.01); C07C 59/60 (2013.01); C07C 59/72 (2013.01);
Abstract
This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.