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. 26, 2016
Filed:
Apr. 30, 2010
Yasutaka Takada, Funabashi, JP;
Miyako Kamon, Funabashi, JP;
Shiro Kawahara, Funabashi, JP;
Yasuhiro Umeda, Funabashi, JP;
Yasutaka Takada, Funabashi, JP;
Miyako Kamon, Funabashi, JP;
Shiro Kawahara, Funabashi, JP;
Yasuhiro Umeda, Funabashi, JP;
NISSAN CHEMICAL INDUSTRIES, LTD., Tokyo, JP;
Abstract
Crystal forms of (3R,4S)-7-hydroxymethyl-2,2,9-trimethyl-4-(phenethylamino)-3,4-dihydro-2H-pyrano[2,3-g]quinolin-3-ol that are excellent as a drug, and production methods thereof. Production methods include crystallizing (3R,4S)-7-hydroxymethyl-2,2,9-trimethyl-4-(phenethylamino)-3,4-dihydro-2H-pyrano[2,3-g]quinolin-3-ol from an acetate ester solvent, an aliphatic hydrocarbon solvent, a nitrile solvent, an aromatic hydrocarbon solvent, a ketone solvent or an ether solvent, and crystal forms obtained according to the methods.