Patents by Inventor William A. Van Saun

William A. Van Saun 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).

  • Cyclohexadiene carboxylate insecticide intermediates
    Patent number: 4486588
    Abstract: Precursors to benzyl compounds, useful in the manufacture of pyrethroid insecticides, are prepared by regiospecific addition of an enamine to a heterocyclic diene accompanied by elimination of volatile by-products.
    Type: Grant
    Filed: October 19, 1982
    Date of Patent: December 4, 1984
    Assignee: FMC Corporation
    Inventors: William A. Van Saun, David M. Roush
  • Substituted 7-oxabicyclo[2,2,1]hepta-2,5-diene methanols
    Patent number: 4348326
    Abstract: Novel alcohols of the formula ##STR1## where R.sup.5 is hydrogen are useful intermediates in the preparation of insecticidal esters. The insecticides are compounds in which R.sup.5 is a substituted-vinylcyclopropanecarbonyl group, a tetramethylcyclopropanecarbonyl group, or a chlorophenyl-2-methylpropylcarbonyl group.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: September 7, 1982
    Assignee: FMC Corporation
    Inventor: William A. Van Saun, Jr.
  • Insecticidal esters of certain substituted 7-oxabicyclo[2.2.1]2,5-heptadiene methanols
    Patent number: 4239773
    Abstract: Novel alcohols of the formula ##STR1## where R.sup.5 is hydrogen are useful intermediates in the preparation of insecticidal esters. The insecticides are compounds in which R.sup.5 is a substituted-vinylcyclopropanecarbonyl group, a tetramethylcyclopropanecarbonyl group, or a chlorophenyl-2-methylpropylcarbonyl group.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: December 16, 1980
    Assignee: FMC Corporation
    Inventor: William A. Van Saun, Jr.
  • Herbicidal clomazone compositions and methods of use tolerant to corn and other crops
    Patent number: H806
    Abstract: Synergistic herbicidal effect is obtained in the application of clomazone together with reduction in the rate of clomazone, by combining clomazone with a photosystem II (PS-II) inhibiting herbicide such as atrazine, cyanazine or linuron. Crops such as corn and other gramineous plants are rendered more tolerant to clomazone and to combinations of clomazone with a PS-II inhibiting herbicide by treatment of the crops or crop seeds with a safener such as 1,8-naphthalic anhydride.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: August 7, 1990
    Assignee: FMC Corporation
    Inventors: David W. Keifer, John M. Tymonko, Earl D. Felix, William A. Van Saun