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:
Sep. 15, 1998
Filed:
Jun. 25, 1997
Applicant:
Inventors:
Derek McManus, Roselle, IL (US);
Arthur E Martell, College Station, TX (US);
Dian Chen, Bryan, TX (US);
Assignee:
U.S. Filter/Engineered Systems, Plainfield, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ;
U.S. Cl.
CPC ...
546 21 ; 987102 ;
Abstract
A class of pyridine phosphonate compounds is disclosed that are useful as ligands in the one manufacture of oxidation-reduction catalysts. In particular, pyridine-2,6-disphosphonic acid is a specie of the pyridine phosphonate ligands that can be combined with a polyvalent metal to produce a catalyst to convert hydrogen sulfide to solid sulfur.