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:
Feb. 08, 2005
Filed:
Aug. 01, 2002
Applicants:
Erika Feher, Debrecen, HU;
Ferenc Korodi, Debrecen, HU;
Claude Singer, Kafar Saba, IL;
Erika Magyar, Debrecen, HU;
Inventors:
Erika Feher, Debrecen, HU;
Ferenc Korodi, Debrecen, HU;
Claude Singer, Kafar Saba, IL;
Erika Magyar, Debrecen, HU;
Assignee:
Biogal Gyogyszergyar Rt., Debrecen, HU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D487/04 ; A61K031/519 ; G01N033/15 ;
U.S. Cl.
CPC ...
Abstract
Zaleplon can be separated from a regioisomer impurity by crystallization from selected solvents or by adding an anti-solvent to a solution of zaleplon and the regioisomer. Zaleplon crystalline Forms II, III, IV, and V are useful for the treatment of insomnia. These crystalline Forms are described along with processes for making them v crystallization from selected solvents.