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:
Nov. 01, 2011
Filed:
Sep. 23, 2004
Applicants:
Arina Ceausu, Rishon Lezion, IL;
Anita Lieberman, Ramat Aviv, IL;
Judith Aronhime, Rechovot, IL;
Inventors:
Assignee:
Teva Pharmaceutical Industries, Ltd., Petah Tiqva, IL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 29/54 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides an improved process for preparing modafinil, whereby it may be isolated in high purity by a single crystallization. The process produces modafinil free of sulphone products of over-oxidation and other byproducts. The invention further provides new crystalline Forms II-VI of modafinil and processes for preparing them. Each of the new forms is differentiated by a unique powder X-ray diffraction pattern. The invention further provides pharmaceutical compositions containing novel modafinil Forms II-IV and VI.