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, 1981
Filed:
Jan. 03, 1980
Michael D Barker, Sittingbourne, GB;
Shell Oil Company, Houston, TX (US);
Abstract
Novel tetrahydrofuran derivatives which are compounds of the general formula I or the N-oxides or salts thereof ##STR1## wherein each of R.sup.1 and R.sup.2 independently represents a hydrogen atom, a halogen atom, or an optionally-substituted alkyl, cycloalkyl or aryl group, or R.sup.1 and R.sup.2 together represent an optionally-substituted alkylene group; each of R.sup.3, R.sup.4, R.sup.5 and R.sup.6, any two or more of which may be the same or different, represents a hydrogen atom, a halogen atom, a mono- or di- alkylamino group or an optionally substituted alkyl, alkoxy, alkylthio or aryl group, or R.sup.3 and R.sup.5 have one of these meanings and R.sup.4 and R.sup.6 together represent a carbon-carbon bond; R.sup.7 represents a hydrogen atom or an optionally-substituted alkyl group; each of R.sup.8 and R.sup.9 independently represents a hydrogen atom or an optionally-substituted alkyl group; and Het represents an optionally-substituted fully unsaturated ring having 5 or 6 atoms in the ring of which one is a nitrogen atom and the remainder are carbon atoms; exhibit herbicidal activity.