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. 21, 1982
Filed:
Mar. 16, 1981
Applicant:
Inventor:
Walter L Petty, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
2604 / ; 424304 ;
Abstract
A pesticidal phenylacetate Y enantiomer pair is prepared by precipitating crystals of novel phenylacetate X enantiomer pair in the presence of crystals of phenylacetate X from a solution of racemic phenylacetate and recovering the filtrate rich in the Y enantiomer pair. The phenylacetate X crystals can be redissolved, epimerized and the epimerizaion product recycled to improve the yield of phenylacetate Y enantiomer pair.