Patents by Inventor Herbert Frauenrath

Herbert Frauenrath 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).

  • Novel 2-aryl-2-azolylmethyl-1,3-dioxepine fungicides
    Patent number: 4742071
    Abstract: 2-Aryl-2-azolylmethyl-1,3-dioxepines of the formula ##STR1## in which Az is imidazol-1-yl or 1,2,4-triazol-1-yl,X is the ethylene or vinylene grouping, andAr is optionally substituted aryl, or addition products thereof with acids or metal salts, which possess fungicidal activity.
    Type: Grant
    Filed: July 25, 1985
    Date of Patent: May 3, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Udo Kraatz, Gerhard Jager, Karl H. Buchel, Wilhelm Brandes, Paul Reinecke, Hans-Dieter Scharf, Herbert Frauenrath
  • 2-Aryl-2-azolylmethyl-1,3-dioxepine fungicides
    Patent number: 4559355
    Abstract: 2-Aryl-2-azolylmethyl-1,3-dioxepines of the formula ##STR1## in which Az is imidazol-1-yl or 1,2,4-triazol-1-yl,X is the ethylene or vinylene grouping, andAr is optionally substituted aryl, or addition products thereof with acids or metal salts, which possess fungicidal activity.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: December 17, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Udo Kraatz, Gerhard Jager, Karl H. Buchel, Wilhelm Brandes, Paul Reinecke, Hans-Dieter Scharf, Herbert Frauenrath
  • 2-Acylated dihydro-1,3-dioxepins, process for the production thereof and use thereof as photo-initiators
    Patent number: 4485249
    Abstract: 2-Acylated dihydro-1,3-dioxepins proved to be highly reactive photoinitiators having a low tendency towards yellowing.
    Type: Grant
    Filed: July 7, 1983
    Date of Patent: November 27, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: Hans-Dieter Scharf, Herbert Frauenrath, Hans-Georg Heine, Hans Rudolph, Karl-Friedrich Neuhaus, Otto Bendszus
  • Preparation of tetrahydrofuran-3-aldehydes
    Patent number: 4292246
    Abstract: A process for the preparation of a tetrahydrofuran-3-aldehyde of the formula ##STR1## in which R.sup.1 is hydrogen, or an alkyl or phenyl radical, andR.sup.2 is an alkyl, (C.sub.1 -C.sub.4 -alkoxy)-carbonyl, (C.sub.1 -C.sub.4 -alkoxy) carbonylmethylene or phenyl radical, orR.sup.1 and R.sup.2 together are an alkanediyl radical,comprising heating a 4,5-dihydro-1,3-dioxepine of the formula ##STR2## at about 100.degree. to 250.degree. C. in the presence of a catalytic amount of o-toluic acid. Advantageously about 0.05 to 0.15 mole of o-toluic acid is used per mole of the dioxepine, and heating is effected between about 120.degree. and 200.degree. C. at a pressure up to about 10 bars. The compounds, some of which are new, are insecticidally and acaricidally active.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: September 29, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Dieter Scharf, Herbert Frauenrath