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:
Feb. 23, 1982
Filed:
Feb. 27, 1979
Francois Guigues, Rillieux, FR;
Gilles Peris Y Saborit, La Duchere, FR;
Guy Borrod, Villeurbanne, FR;
Philagro, Lyons, FR;
Abstract
New 2-phenyl-5,6-dihydro-4-pyrone derivatives and herbicidal compositions in which they are present. They correspond to the general formula: ##STR1## in which: R.sub.1 and R.sub.2, which are identical or different, represent a hydrogen atom or an alkyl radical (C.sub.1 -C.sub.4), or together form an alkylene chain (C.sub.2 -C.sub.6), R.sub.3 represents an alkyl radical (C.sub.1 -C.sub.4), an alkenyl radical (C.sub.2 -C.sub.4), an alkynyl radical (C.sub.2 -C.sub.4), a halogenoalkyl radical (C.sub.1 -C.sub.4) or an alkoxyalkyl radical (C.sub.3 -C.sub.5), Y represents a halogen atom, an alkyl radical (C.sub.1 -C.sub.4) or an alkoxy radical (C.sub.1 -C.sub.4), and n represents an integer which can be equal to 1, 2 or 3, with the proviso that, when n is equal to 2 or 3, the radicals Y can be identical or different. These compounds can be used for selectively destroying weeds in crops such as sunflower, cotton, soft wheat, rice, soya bean, groundnut, bean and tomato plant.