Patents by Inventor Werner Gey

Werner Gey 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 production of polyester polymer for food packing
    Patent number: 4263425
    Abstract: Polyethylene terephthalate having an acetaldehyde content of less than 2.5 ppm and suitable for packing of food and beverages intended for human consumption is produced by heating polyethylene terephthalate having an intrinsic viscosity of about 0.5--0.85 at a temperature of 180.degree.-230.degree. C., preferably 200.degree.-220.degree. C., for about 4 to 12 hours. The polyethylene terephthalate must not include more than 25 ppm of ester interchange catalyst or 20 ppm of phosphorous during this heating.
    Type: Grant
    Filed: November 8, 1978
    Date of Patent: April 21, 1981
    Assignee: Zimmer Aktiengesellschaft
    Inventors: Hans-Jochen Rothe, Peter Freund, Werner Gey, Helmut Heinze
  • Process for the solid state polycondensation of linear polyesters
    Patent number: 4069194
    Abstract: A separating or anticaking agent consisting of spherical glass particles having a diameter of 3 to 30.mu. is added to polyester resin granulates to prevent agglomeration during solid state polycondensation in a plug-flow reactor. Thin-walled articles formed from the end product are characterized by high strength, high transparency, crystal clear color, good gas impermeability and a smooth surface.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: January 17, 1978
    Assignee: Zimmer Aktiengesellschaft
    Inventors: Werner Gey, Wolfgang Langhauser, Helmut Heinze, Hans-Joachim Rothe, Peter Freund
  • Process for the production of linear polyesters
    Patent number: 3998793
    Abstract: An alkali metal hydrogen monoglycolphosphate is added to the reaction product of diethylene glycol and dimethyl terephthalate to arrest the ester-interchange reaction and nullify the action of the divalent metal salt catalyst. These phosphates are easy to handle and convert the catalyst to an inactive compound which does not adversely affect subsequent polycondensation of the diethylene glycol terephthalate.
    Type: Grant
    Filed: March 6, 1975
    Date of Patent: December 21, 1976
    Assignee: Zimmer Aktiengesellschaft
    Inventors: Werner Gey, Wolfgang R. Langhauser