Patents by Inventor Hans-Hermann Weigand

Hans-Hermann Weigand 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).

  • Metal alloy for cast prosthetic frames in dentistry
    Patent number: 5227131
    Abstract: A metal alloy for cast prosthetic frames in dentistry, consisting of (in % by weight)______________________________________ 0.1 to 0.3 % C up to 1.5 % Si up to 3 % Mn 25 to 35 % Cr 3 to 6.5 % Mo 0.5 to 5 % Ta 0.15 to 0.40 % N ______________________________________remainder cobalt and residual impurities.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: July 13, 1993
    Assignee: Thyssen Stahl Aktiengesellschaft
    Inventor: Hans-Hermann Weigand