Patents by Inventor Horst Pietruck

Horst Pietruck 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).

  • Multiple-layer tubing
    Patent number: 4287217
    Abstract: Disclosed is a multiple layered film preferably in the form of a tube and being suitable for forming sausage casings, comprising: a central layer of a cellulose hydrate-based material; a first layer on the inside of the central layer, comprising a film of thermoplastic synthetic resinous material and being impermeable to water and water vapor; and a second layer on the outside of the central layer, comprising a synthetic elastic copolymer and being permeable to water and water vapor. Also disclosed is a method for preparing these film products.
    Type: Grant
    Filed: August 4, 1978
    Date of Patent: September 1, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Klaus-Dieter Hammer, Martin Schroder, Horst Pietruck, Max Bytzek
  • Process for preparing packaging material suitable for sausage casings
    Patent number: 4248912
    Abstract: Disclosed is a packaging material suitable for manufacturing synthetic sausage casings, comprised of a cellulose hydrate base layer and a layer of vinylidene chloride containing copolymer on the base layer, as well as several methods for preparing the packaging material.
    Type: Grant
    Filed: April 3, 1979
    Date of Patent: February 3, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Gerigk, Wolfgang Klendauer, Horst Pietruck, Klaus-Dieter Hammer
  • Tubular packaging material
    Patent number: 4192904
    Abstract: Disclosed is a packaging material suitable for manufacturing synthetic sausage casings, comprised of a cellulose hydrate base layer and a layer of vinylidene chloride containing copolymer on the base layer, as well as several methods for preparing the packaging material.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: March 11, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Gerigk, Wolfgang Klendauer, Horst Pietruck, Klaus-Dieter Hammer