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:
Dec. 07, 1999
Filed:
Sep. 09, 1998
Applicant:
Inventors:
Kym B Arcuri, Greenwell Springs, LA (US);
Dwayne A Goetsch, Excelsior, MN (US);
Assignee:
Gradient Technology, Excelsior, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568710 ; 568708 ;
Abstract
A process for the conversion of a picrate salt, preferably ammonium pricrate, to picric acid by acidifying the picrate salt in a two phase liquid system. One phase is an aqueous phase which contains an acid which is effective for acidifying ammonium picrate to picric acid and the other phase is an organic solvent phase in which the picric acid is soluble.