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:
Apr. 30, 2013
Filed:
Apr. 17, 2009
Guocheng Wang, Tianjin, CN;
Xueyu Xu, Tianjin, CN;
Guocheng Wang, Tianjin, CN;
Xueyu Xu, Tianjin, CN;
Tianjin Tasly Group Co., Ltd., Tianjin, CN;
Abstract
The present invention discloses a crystalline form of S-zopiclone (Formula I) having a powder X-Ray diffraction spectrum excited by Cu-Ka radiation with characteristic peaks expressed in terms of 2θ at about 11.08°, about 12.38°, about 15.86°, about 17.88°, about 19. 98° and about 20.58°; a DSC thermogram with a peak at about 207.7° C. and an infrared absorption spectrum (IR) with characteristic peaks at about 3078 cm, about 2942˜2838 cm, about 2790 cm, about 1716 cm, about 1463 cm, about 1372 cmand about 757 cm. The present invention also discloses a method for preparing the crystalline form of eszopiclone, its pharmaceutical composition and its use in preparing a medicament for treating sleep disorders.