Patents by Inventor Heinz D. Buhnen

Heinz D. Buhnen 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 ethylene and methoxyacetic acid vinyl ester
    Patent number: 4954594
    Abstract: Copolymers consisting of 95 to 50 weight percent of ethylene and 5 to 50 weight percent of methoxyacetic acid vinyl ester and having a molecular mass from 500 to 10,000 g.times.mole.sup.-1. Methods for preparation and use are also disclosed. The copolymers are used as flow improvers for mineral oil distillates, in particular mineral oil middle distillates.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: September 4, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Payer, Heinz D. Buhnen, Wilhelm Zoller
  • Copolymers of ethylene and methoxyacetic acid vinyl ester and their use as additives for mineral oil distillates
    Patent number: 4928720
    Abstract: Copolymers consisting of 95 to 50 weight percent of ethylene and 5 to 50 weight percent of methoxyacetic acid vinyl ester and having a molecular mass from 500 to 10,000 g.times.mole .sup.-1. Methods for preparation and use are also disclosed. The copolymers are used as flow improvers for mineral oil distillates, in particular mineral oil middle distillates.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: May 29, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Payer, Heinz D. Buhnen, Wilhelm Zoller