Patents by Inventor Hans Weinert

Hans Weinert 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).

  • Method for the manufacture of segments for commutators
    Patent number: 4349384
    Abstract: A segment of a commutator made by(a) placing a first layer of copper powder and on top thereof a second layer of a mixture of carbon powder and a binder into a die with a cavity shaped like the segment,(b) densifying the powder layers to produce a blank having the form of the segment, and(c) sintering the blank at an elevated temperature to cause the powder particles to cohere and the layers to firmly join together.
    Type: Grant
    Filed: June 27, 1980
    Date of Patent: September 14, 1982
    Assignee: Ringsdorff-Werke GmbH
    Inventor: Hans Weinert
  • Aqueous crystallization of xylitol
    Patent number: 3985815
    Abstract: A process for obtaining crystalline xylitol substantially free of xylose from a mixture of xylose and xylitol by providing an aqueous solution of about 50 to 75 weight percent xylitol, no more than about 5 weight percent xylose and about 20 to 45 weight percent water and fractionally crystallizing xylitol from the aqueous solution to provide crystalline xylitol containing no more than about 0.10 weight percent xylose.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: October 12, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Gerald Myer Jaffe, Peter Hans Weinert