Patents by Inventor Allen L. Hall

Allen L. Hall 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).

  • 1,1-Disubstituted 2-vinyl- and 2-ethylcyclopropanes
    Patent number: 4399076
    Abstract: 2-Vinyl- and 2-ethylcyclopropanes having an aryl group and a nitrogen-containing radical substituted at the 1-position on the ring are provided. The novel 1,1-disubstituted 2-vinylcyclopropane and 2-ethylcyclopropane compounds of this invention have utility in herbicidal applications and are useful reactants. The 2-vinylcyclopropane derivatives are useful monomers for anionic and radical polymerizations.
    Type: Grant
    Filed: February 22, 1982
    Date of Patent: August 16, 1983
    Assignee: National Distillers and Chemical Corporation
    Inventors: Richard G. Fayter, Jr., Allen L. Hall
  • Process for the preparation of vinylcyclopropane derivatives
    Patent number: 4328169
    Abstract: This invention provides a convenient and commercially adaptable process for the preparation of vinylcyclopropane derivatives in high yield. For the process an alkylating agent and activated methylene compound are reacted in the presence of an alkylene oxide derivative and alkali metal compound. Water can also be present and/or the reaction may be carried out in an inert organic diluent.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: May 4, 1982
    Assignee: Emery Industries, Inc.
    Inventor: Allen L. Hall