Patents by Inventor Friedrich Staiss

Friedrich Staiss 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 separation of petroleum emulsions of the water-in-oil type
    Patent number: 5385674
    Abstract: In the process described, esterification products of an oxyalkylated primary fatty amine and 0.5 to 1.5 mol per mole of fatty amine of a simple dicarboxylic acid or of a dicarboxylic acid from the group comprising dimeric fatty acids are employed as emulsion breakers.
    Type: Grant
    Filed: May 27, 1993
    Date of Patent: January 31, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rainer Kupfer, Martin Hille, Roland Bohm, Friedrich Staiss
  • Esterified glycidyl ether addition products and their use
    Patent number: 5114616
    Abstract: The novel glycidyl ether addition products are obtained by esterification of a diol compound, selected from the group comprising linear oxyalkylates and other amine-free aliphatic diols, and an addition compound of polyether block polymers and glycidyl ethers with dicarboxylic acids. They are advantageously employed for demulsifying crude oil emulsions.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: May 19, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rainer Kupfer, Martin Hille, Roland Bohm, Friedrich Staiss
  • Process for the separation of crude oil emulsions of the water-in-oil type
    Patent number: 5039450
    Abstract: A process for the separation of crude oil emulsions of the water-in-oil typeIn the novel process addition products made from certain ethylene oxide/propylene oxide block polymers and certain polyglycidyl ethers of phenol/formaldehyde condensation products are added to the crude oil emulsions.
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: August 13, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rainer Kupfer, Willibald Bose, Martin Hille, Roland Bohm, Friedrich Staiss
  • Branched, quaternary polyoxyalkylene copolyesters, a process for their preparation, and their use
    Patent number: 4885111
    Abstract: Branched, quaternary polyoxyalkylene copolyesters are described which are prepared by esterifying an oxyalkylated primary fatty amine and an at least trihydric oxyalkylated alkanol or an oxyalkylated polyamine using a dicarboxylic acid or a dicarboxylic anhydride with polycondensation, and quaternizing the esterification product obtained using ethylene oxide or propylene oxide in the presence of a mineral acid or carboxylic acid. The novel, branched, quaternary polyoxyalkylene copolyesters are used as demulsifiers and corrosion inhibitors in the processing of crude oil emulsions.
    Type: Grant
    Filed: November 12, 1987
    Date of Patent: December 5, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wllibald Bose, Manfred Hofinger, Martin Hille, Roland Bohm, Friedrich Staiss
  • Branched polyoxyalkylene copolyesters, a process for their preparation, and their use
    Patent number: 4885110
    Abstract: Branched polyoxyalkylene copolyesters are described which are prepared by esterifying an oxyalkylated primary fatty amine and an at least trihydric oxyalkylated alkanol or an oxyalkylated polyamine using a dicarboxylic acid or a dicarboxylic anhydride with polycondensation. The novel branched polyoxyalkylene copolyesters are used as demulsifiers for breaking crude oil emulsions.
    Type: Grant
    Filed: November 12, 1987
    Date of Patent: December 5, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Willibald Bose, Manfred Hofinger, Martin Hille, Roland Bohm, Friedrich Staiss
  • Oxalkylated polyester-amines, a process for their preparation and their use
    Patent number: 4734523
    Abstract: Oxalkylated polyester-amines which are prepared by esterifying, with polycondensation, an oxalkylated primary fatty amine with a diol and with a dicarboxylic acid, are described. These polyester-amines are used as demulsifiers for breaking crude oil emulsions.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: March 29, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Manfred Hofinger, Willibald Bose, Martin Hille, Roland Bohm, Friedrich Staiss