Patents by Inventor Gunter Gruber

Gunter Gruber 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 using polyacrylamide drag reducing agent in the form of an aqueous jelly
    Patent number: 4263927
    Abstract: The frictional drag of aqueous liquids and suspensions in turbulent or pulsating flow is reduced by adding 1 to 1,000 ppm of a polyacryl amide or partially saponified polyacryl amide obtained in its manufacturing process in the form of an aqueous, dimensionally stable jelly which has retained its solubility in water and is capable of being cut.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: April 28, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans Wilski, Werner Interthal, Gunter Gruber, Gerhard Slebos
  • Melamine resin films prepared by impregnating of paper, cellulose, fleece or fabric
    Patent number: 4016336
    Abstract: Melamine resin films prepared by impregnating paper, cellulose fleece or fabric with a solution of a monomeric dimethylolmelamine mono-, di- or trimethylether, monomeric trimethylolmelamine mono-, di- or trimethylether or a mixture thereof and drying the same at temperatures of about 130.degree. to about 180.degree. C.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: April 5, 1977
    Assignee: Cassella Farbwerke Mainkur Aktiengesellschaft
    Inventors: Karl Schnee, Dieter Tichy, Walter Michel, Gunter Gruber
  • Process of preparing melamine resin films by impregnation of paper, cellulose, fleece or fabric
    Patent number: 3936547
    Abstract: Melamine resin films prepared by impregnating paper, cellulose fleece or fabric with a solution of a monomeric dimethylolmelamine mon-, di- or trimethylether, monomeric trimethylolmelamine mono-, di or trimethylether or a mixture thereof and drying the same at temperatures of about 130.degree. to about 180.degree.C.
    Type: Grant
    Filed: February 14, 1974
    Date of Patent: February 3, 1976
    Assignee: Cassella Farbwerke Mainkur Aktiengesellschaft
    Inventors: Karl Schnee, Dieter Tichy, Walter Michel, Gunter Gruber