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:
May. 09, 2017
Filed:
Sep. 26, 2013
Applicant:
Aska Pharmaceutical Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
Aska Pharmaceutical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 31/57 (2006.01); C07J 7/00 (2006.01); C07J 41/00 (2006.01);
U.S. Cl.
CPC ...
C07J 41/0083 (2013.01); C07B 2200/13 (2013.01);
Abstract
A novel crystalline polymorphic form of ulipristal acetate useful as an agent for preventing and/or treating uterine leiomyoma and as a contraceptive, and a process for producing the crystalline polymorphic form are provided. The novel crystalline polymorphic form of ulipristal acetate is obtained by crystallization or transition in association with a specified solvent. The solvent comprises at least one member selected from the group consisting of water, an aliphatic hydrocarbon, an aromatic hydrocarbon, a halogenated hydrocarbon, a linear alcohol, an alkyl ether, an acetate ester, an alkyl ketone, an N-alkylacylamide, and an alkanenitrile.