Patents by Inventor Walter Ohnemuller

Walter Ohnemuller 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).

  • Synthetic wollastonite and a process for its manufacture
    Patent number: 3967974
    Abstract: Substantially pure, synthetic crystalline .beta.-wollastonite having a specific BET surface of 1-30 m.sup.2 /g made by first producing calcium silicate hydrates having a molar ratio of SiO.sub.2 :CaO = about 0.7 to about 1.3 by hydrothermal treatment of an aqueous mixture of a source of CaO and SiO.sub.2 and then annealing the calcium silicate hydrates at about 800.degree.C to about 1150.degree.C to convert them to the .beta.-wollastonite. The invention also encompasses the use of the calcium silicate hydrates and the .beta.-wollastonite in the manufacture of ceramic materials and glazings.
    Type: Grant
    Filed: January 21, 1975
    Date of Patent: July 6, 1976
    Assignee: Reimbold & Strick
    Inventors: Walter Ohnemuller, Alexander Solf