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:
Jul. 15, 2014
Filed:
Oct. 04, 2010
Applicants:
Samuel Corentin Cogels, Ixelles, BE;
David Lemin, Watermael-Boitsfort, BE;
Patrick Notté, Wavre, BE;
Inventors:
Samuel Corentin Cogels, Ixelles, BE;
David Lemin, Watermael-Boitsfort, BE;
Patrick Notté, Wavre, BE;
Assignee:
Straitmark Holding AG, Zug, CH;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F 9/38 (2006.01); C07F 9/572 (2006.01); C07F 9/58 (2006.01); C07F 9/59 (2006.01); C07F 9/6506 (2006.01); C07F 9/6561 (2006.01);
U.S. Cl.
CPC ...
Abstract
The technology of this invention concerns a method for the manufacture of hydroxy diphosphonic acids containing an amino moiety. The method specifically involves reacting a liquid POwith an aminocarboxylic acid in the presence of a sulfonic acid. The aminocarboxylic acid is selected from 3 structurally different compounds. The amino hydroxy diphosphonic acids can be synthesized with high selectivity and purity and the unreacted starting raw materials can easily and conveniently be recirculated.