Patents by Inventor Werner Reimann

Werner Reimann 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).

  • Copolymers of ethylenically unsaturated carboxylic acid esters with polyoxyalkylene ethers of lower, unsaturated alcohols as flow-improving agents for paraffin containing oils
    Patent number: 5718821
    Abstract: The invention relates to novel copolymers of ethylenically unsaturated carboxylic acid esters with polyoxyalkylene ethers of lower, unsaturated alcohols, their preparation, their use as flow-improving agents for paraffin-containing oils, and oils which contain such copolymers.The invention also relates to the use of known copolymers of ethylenically unsaturated carboxylic acid esters with polyoxyalkylene ethers of allyl and/or methallyl alcohol as flow-improving agents for paraffin-containing oils.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: February 17, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Matthias Krull, Sigmar-Peter von Halasz, Werner Reimann, Juliane Balzer, Horst Geiss
  • Graft polymers, their preparation and use as pour point depressants and flow improvers for crude oils, residual oils and middle distillates
    Patent number: 5439981
    Abstract: Graft polymers which comprise 20 to 99.9% by weight of an ethylene copolymer (base polymer) and 0.1 to 80% by weight of a graft component. The base polymer includes 30% to 95% by weight of ethylene and (1) 5% to 70% by weight of vinyl esters of saturated aliphatic C.sub.2 - to C.sub.18 -monocarboxylic acids or (2) 4% to 50% by weight of vinyl esters of saturated aliphatic C.sub.2 - to C.sub.18 -monocarboxylic acids and 1% to 20% by weight of linear or branched C.sub.3 - to C.sub.18 -monoolefins. Graft components are N-substituted alpha,beta-unsaturated dicarboxylic acid imides, dicarboxylic acid amides, dicarboxylic acid half-amides, or ammonium salts of the half-amides. The graft polymers are employed for improving the flow properties of paraffin-containing mineral oils, mineral oil distillates, and middle distillates.
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: August 8, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Juliane Balzer, Michael Feustel, Matthias Krull, Werner Reimann
  • Terpolymers of ethylene, their preparation, and their use as additives for mineral oil distillates
    Patent number: 5254652
    Abstract: Terpolymers which are copolymers of ethylene, vinyl acetate, and vinyl neononanoate or vinyl neodecanoate, a process for their preparation, and a method of their use as additives for mineral oil distillates.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: October 19, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Werner Reimann, Michael Feustel, John Hobes
  • Terpolymers of ethylene, their preparation and their use as additives for mineral oil distillates
    Patent number: 5205839
    Abstract: Terpolymers obtained by polymerizing a mixture of ethylene, vinyl acetate, and isobutyl vinyl ether, a process for their preparation, and methods of their use as additives for mineral oil distillates.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: April 27, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Werner Reimann
  • Terpolymers of ethylene, their preparation and their use as additives for mineral oil distillates
    Patent number: 5200484
    Abstract: Terpolymers obtained by polymerizing a mixture of ethylene, vinyl acetate, and isobutyl vinyl ether, a process for their preparation, and methods of their use as additives for mineral oil distillates.
    Type: Grant
    Filed: June 18, 1991
    Date of Patent: April 6, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Werner Reimann
  • Process for the preparation of ethylene/vinyl ester copolymers
    Patent number: 5145923
    Abstract: For the preparation of copolymers of ethylene, ethylene is polymerized with esters of vinyl alcohol in the absence of solvents and emulsifiers and in the presence of free radical acceptors. The addition of free radical acceptors makes it possible to increase the polymerization temperature in comparison to a procedure without the use of free radical acceptors.
    Type: Grant
    Filed: June 18, 1991
    Date of Patent: September 8, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: John V. Hobes, Wolfgang Payer, Werner Reimann