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:
May. 04, 1976
Filed:
Aug. 19, 1974
William A Erby, Alburtis, PA (US);
James F Tompkins, Allentown, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
Halogenation of C.sub.5 - C.sub.10 saturated keto mono-carboxy acids or their acidogenic derivatives with elemental halogen in the presence of certain catalysts to yield olefinic halogenated compounds (e.g. acids and lactones) containing at least four halogen atoms per molecule is disclosed. The catalyst selected depends upon the particular end product desired. Halogenated products of the process are useful as insecticides, plant growth control agents and defoliants. Particularly useful products are those olefinic polychlorinated derivatives of 4-keto-pentanoic acid which contain at least four chlorine atoms per molecule such as, for example, 2,3,5,5,5-pentachloro-4-keto pentenoic acid.