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. 07, 2025
Filed:
May. 20, 2020
Applicant:
Shanghai Forefront Pharmaceutical Co., Ltd, Shanghai, CN;
Assignee:
SHANGHAI FOREFRONT PHARMCEUTICAL CO., LTD., Shanghai, CN;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 59/72 (2006.01); A61K 31/192 (2006.01); A61K 45/06 (2006.01); C07C 51/43 (2006.01);
U.S. Cl.
CPC ...
C07C 59/72 (2013.01); A61K 31/192 (2013.01); A61K 45/06 (2013.01); C07C 51/43 (2013.01); C07B 2200/13 (2013.01);
Abstract
Disclosed are a new crystal form of treprostinil sodium salt (the structural formula thereof is shown as formula I) and a preparation method therefor. Specifically, disclosed are a five and half hydrates of the treprostinil sodium salt and some dehydrated crystal forms thereof. The new crystal form has better stability and hygroscopicity. As a treprostinil crude drug, the new crystal form can meet the requirements for storage and loading and transportation, is stable in terms of quality and can guarantee the controllable quality of subsequent preparation products.