Patents by Inventor Wichard Pump

Wichard Pump 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 production of laminate systems from a low density polyethylene coating resin
    Patent number: 4287262
    Abstract: Laminate systems with improved bond strength prepared by coating of flexible substrates with low density polyethylene and a process for preparing said laminate systems are claimed which are characterized in that a polyethylene is used as a coating resin, which is obtained if(a) two autoclaves are connected in series such that all the reaction product of the first reactor is transferred to the second reactor,(b) a length-/diameter ratio (L/D) of 1:1 to 3:1 is chosen for each autoclave,(c) the monomer feed stream is distributed between the two reactors such that the monomer feed stream to the first reactor is the same as or greater than the monomer feed stream to the second reactor,(d) the reaction temperatures in the two autoclaves are adjusted such that the reaction temperature in the first reactor is lower than the reaction temperature in the second reactor,(e) the initiator chosen for the first reactor is the same as or different from the initiator chosen for the second reactor, and which has a density of 0
    Type: Grant
    Filed: November 30, 1979
    Date of Patent: September 1, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Forest Engelhard, Rainer Kuhn, Wichard Pump, Reinhard Riess, Hugo Streib
  • Foamed polyethylene films
    Patent number: 4273880
    Abstract: A process for the production of foamed films of polyethylene or ethylene vinyl acetate copolymers using metal salts of aliphatic fatty acids as additives.
    Type: Grant
    Filed: July 19, 1979
    Date of Patent: June 16, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wichard Pump, Wolfgang Becker, Edwin Woldenberg