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:
Jun. 07, 2022
Filed:
Sep. 26, 2019
Applicant:
Cheminova A/s, Philadelphia, PA (US);
Inventors:
Assignee:
CHEMINOVA A/S, Ronland, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 9/17 (2006.01); B01J 31/02 (2006.01);
U.S. Cl.
CPC ...
C07F 9/17 (2013.01); B01J 31/0229 (2013.01); B01J 31/0231 (2013.01);
Abstract
The present invention relates to an improved synthesis of malathion. The presence of an acid facilitates the reaction between O,O-dimethyldithiophosphoric acid (O,O-DMDTPA) and maleate and leads to excellent product yield in shorter reaction time with fewer impurities.