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. 22, 1981
Filed:
Mar. 25, 1980
Applicant:
Inventors:
Petrus A Kramer, Amsterdam, NL;
Pieter A Verbrugge, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
560124 ; 2604 / ; 260463 ; 260941 ; 260946 ; 260950 ; 260957 ; 260960 ; 568346 ; 568347 ; 568591 ; 570216 ; 570218 ;
Abstract
Conversion of esters (R.sup.1)(R.sup.2)C(C Hal.sub.3)OX, X being-P Hal.sub.2, --C(O)OR.sup.3 or ##STR1## R.sup.1, R.sup.3 and R.sup.4 being optionally substituted hydrocarbyl groups and R.sup.2 methyl or hydrogen, with zinc in acetic acid gives a very high yield of a dihalovinyl compound (R.sup.1)(R.sup.2)C.dbd.C Hal.sub.2, e.g., of the ethyl ester of the parent acid of pyrethroid insecticides.
Kramer, Petrus. (1981). Process of preparing dihalovinyl compounds (U.S. Patent No. 4307243). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4307243
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile