Patents by Inventor William George Scharpf

William George Scharpf has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for preparing 1,1-dihalo-4-methyl-1,3-pentadienes
    Patent number: 4081488
    Abstract: 1,1-Dihalo-4-methyl-1,3-pentadienes, key intermediates in the syntehsis of insecticidal dihalovinylcyclopropanecarboxylates, may be prepared in three steps beginning with the Friedel Crafts condensation of a vinylidene halide and an isobutyryl halide in the presence of a Lewis acid catalyst, followed by reduction of the 1,1-dihalo-4-methyl-1-penten-3-one produced thereby, and dehydration of the resulting 1,1-dihalo-3-hydroxy-4-methyl-1-pentene.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: March 28, 1978
    Assignee: FMC Corporation
    Inventor: William George Scharpf