Patents by Inventor Wolfgang Persh

Wolfgang Persh 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).

  • Binders based on alkali metal silicates and potassium metaborate
    Patent number: 4171986
    Abstract: Binders based on aqueous alkali metal silicate solution containing from 20% to 55% by weight of alkali metal silicates having a molar ratio SiO.sub.2 :M.sub.2 O of 1.8 to 4, and a content of potassium metaborate.
    Type: Grant
    Filed: March 24, 1978
    Date of Patent: October 23, 1979
    Assignee: Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
    Inventors: Helmut v. Freyhold, Wolfgang Persh