Patents by Inventor Jan A. Ruzicka

Jan A. Ruzicka 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 synthesis of hexafluoropropanes
    Patent number: 5789630
    Abstract: The invention relates to a method of synthesizing 1,1,1,3,3,3-hexafluoropropanes comprsing the additon of BrF.sub.3 to malononitrile.
    Type: Grant
    Filed: February 27, 1996
    Date of Patent: August 4, 1998
    Assignee: University of Iowa Research Foundation
    Inventors: Max T. Baker, Jan A. Ruzicka
  • Process for the synthesis of hexafluoroisopropyl ethers
    Patent number: 5705710
    Abstract: This invention relates to a method of synthesizing 1,1,1,3,3,3-hexafluoroisopropyl ether compounds from the reaction of methoxymalanonitrile with a bromine trifluoride composition.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: January 6, 1998
    Assignee: University of Iowa Research Foundation
    Inventors: Max T. Baker, John H. Tinker, Jan A. Ruzicka
  • Pencil sheath and composition therefor
    Patent number: 4176978
    Abstract: There is disclosed a pencil sheath and composition therefor, the pencil having a core of graphite and the like. The sheath composition is composed substantially of plastics, fillers and two kinds of foaming agents with different decomposition temperatures. The pencil sheath has good cutting or sharpening properties, increased bending strength, and good adhesion to the graphite pencil core.
    Type: Grant
    Filed: January 9, 1979
    Date of Patent: December 4, 1979
    Inventors: Jan Ruzicka, Jindrich Lorenz, Vladimir Marek, Miroslav Tusl