Patents by Inventor John G. Uhlmann

John G. Uhlmann 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).

  • Removal of hydrogen-containing silanes from organosilane mixtures
    Patent number: 4985579
    Abstract: The instant invention is a process for the removal of hydrogen-containing silane impurities from organosilanes with similar boiling points. In the instant invention, the hydrogen-containing silane is reacted with a hydrogen halide to replace the hydrogen on the silane with a halide and create a modified silane. The substitution of the heavier halide for the hydrogen, increases the boiling point of the modified silane. This increase in boiling point facilitates separation by distillation of the modified silane impurity from the desired organosilanes.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: January 15, 1991
    Assignee: Dow Corning Corporation
    Inventors: Gary N. Bokerman, James E. Hampton, John G. Uhlmann
  • Method of obtaining release of polyurethane polymers and compositions therefor
    Patent number: 4052495
    Abstract: A method of obtaining release of polyurethane polymers from various substrates is disclosed. Compositions which are specifically described siloxane-polyoxyalkylene copolymers give release properties to cured polyurethane polymers.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: October 4, 1977
    Assignee: Dow Corning Corporation
    Inventors: John G. Uhlmann, Joseph A. Colquhoun
  • Arc track resistant composition
    Patent number: 4011168
    Abstract: A composition consisting essentially of a specific siloxane fluid and a specific type of filler is disclosed to be useful as an electrical coating particularly where arc track resistant characteristics are needed.
    Type: Grant
    Filed: May 6, 1974
    Date of Patent: March 8, 1977
    Assignee: Dow Corning Corporation
    Inventor: John G. Uhlmann