Patents by Inventor Rainer Kupfer

Rainer Kupfer 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 the preparation of alkoxylates having a narrow distribution of homologs using antimony pentahalide complexes as the catalyst
    Patent number: 5210323
    Abstract: In the process described for the preparation of alkoxylates having a narrow distribution of homologs by reaction of compounds containing at least one hydroxyl group with alkylene oxide, complex compounds of antimony pentahalide with a special Lewis base are used as the catalysts. Alkoxylates having a narrow distribution of homologs and good color quality are obtained at a high conversion.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: May 11, 1993
    Assignee: Hoechst Aktiengese Ilschaft
    Inventors: Ignaz Wimmer, Rainer Kupfer
  • Urethanes made from aliphatic fluoro alcohols, isocyanates and carboxylic acids, a process for their preparation and their use
    Patent number: 5171877
    Abstract: The urethanes described are synthesized from aliphatic fluoro alcohols, triisocyanate and a carboxylic acid. They are prepared by reaction of the aliphatic fluoro alcohol with the triisocyanate to give the fluoro alcohol/triisocyanate adduct and by reaction of this adduct with the carboxylic acid. The new urethanes are preferably used for the finishing of textiles for the purpose of achieving water, oil and soil repellency.
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: December 15, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Knaup, Rainer Kupfer, Rolf Kleber, Lothar Jaeckel, Fritz-Joachim Gohlke
  • 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