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:
Aug. 30, 2005
Filed:
Jul. 17, 2001
Applicants:
Jean-bernard Cazaux, Aramon, FR;
Eric Manginot, Montfavet, FR;
Marc Veyrat, Le Pontet, FR;
Inventors:
Assignee:
BioNumerik Pharmaceuticals, Inc., San Antonio, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C319/24 ; C07C319/02 ; C07C323/66 ;
U.S. Cl.
CPC ...
Abstract
The invention concerns a novel method for industrial preparation of disodium 2,2'-dithiobis(alkylsulphonates), and in particular disodium 2,2′-dithiobis(ethanesulphate) (dimesna). Said novel method is summarized by the reaction diagram (A). In diagram (A), Hal represents a halogen atom, and preferably a bromine atom; M represents a sodium or potassium atom; and n represents an integer ranging between 0 and 2.