Patents by Inventor Silvia Dorn

Silvia Dorn 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).

  • Insecticidal compositions
    Patent number: 4919935
    Abstract: The invention is concerned with insecticial compositions which contain as active substances (a) ethyl [2-(4-phenoxyphenoxy)ethyl]carbamate and (b) 2,3-isopropylidenedioxyphenyl methylcarbamate or 2-isopropoxyphenyl methylcarbamate or 2-(1,3-dioxolan-2-yl)phenyl methylcarbamate and, optionally, inert carrier material, and with the manufacture and the use of such compositions.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: April 24, 1990
    Assignee: R. Maag AG
    Inventor: Silvia Dorn
  • Insecticidal compositions
    Patent number: 4423042
    Abstract: Insecticidal compositions, and methods for their use, which comprise a combination of O,O-diethyl-O-(2-isopropyl-4-methylpyrimid-6-yl)-thionophosphoric acid ester with a pyrethroid which synergizes the insecticidal activity of the thionophosphoric acid ester.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: December 27, 1983
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Silvia Dorn, Ulrich Schwieter
  • 1,4-Bis-[(2-propynyloxy)-methyl] cyclohexane
    Patent number: 4270009
    Abstract: Compounds represented by the formulaHC.tbd.C--H.sub.2 C--O--H.sub.2 C--X--CH.sub.2 --O--CH.sub.2 --C.tbd.CHwherein X is phenylene or cyclohexylene as well as pesticidal compositions containing these compounds as the active ingredient, and methods for their use, are disclosed.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: May 26, 1981
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Silvia Dorn, Albert Pfiffner, Rene Zurfluh
  • Pesticidal 1,4-bis-[(-propynyloxy)-methyl]-benzene and 1,4-bis-[(2-propynyloxy)-methyl] cyclohexane
    Patent number: 4235932
    Abstract: Compounds represented by the formulaHC.tbd.C--H.sub.2 C--O--H.sub.2 C--X--CH.sub.2 --O--CH.sub.2 --C.tbd.CHwherein X is phenylene or cyclohexylene as well as pesticidal compositions containing these compounds as the active ingredient, and methods for their use, are disclosed.
    Type: Grant
    Filed: May 29, 1979
    Date of Patent: November 25, 1980
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Silvia Dorn, Albert Pfiffner, Rene Zurfluh
  • Synergistic insecticidal composition
    Patent number: 4191773
    Abstract: Insecticidal compositions, and methods for their use, which comprise a combination of 2,3-(isopropylidenedioxy)phenyl-methyl carbamate with 2-nitro-4-chlorophenyl 2-propynyl ether, a compound which synergizes the insecticidal activity of the carbamate.
    Type: Grant
    Filed: November 17, 1978
    Date of Patent: March 4, 1980
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Silvia Dorn