Patents by Inventor Kurt Gotter

Kurt Gotter 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).

  • Porous glass membrane tubes
    Patent number: 4780369
    Abstract: The invention relates to a process for producing a tubular glass membrane with wall thicknesses between 5 and 30 microns and reproducible pore sizes between 11 A and 50 A. Alkali borosilicate glass is drawn into discrete hollow tubes and immediately cooled. The tubes are thermally treated to effect a phase separation into a coherent silicon dioxide phase and a boron oxide phase rich in alkali borate. The boron oxide phase is leached out with mineral acid. The tubes can be subsequently treated to give enlarged or reduced pores, asymmetric pores and coated surfaces.
    Type: Grant
    Filed: April 12, 1984
    Date of Patent: October 25, 1988
    Assignee: Jenaer Glaswerk, Schott & Gen.
    Inventors: Roland Schnabel, Alexander Holzel, Kurt Gotter
  • Process for production of porous glass membrane tubes
    Patent number: 4042359
    Abstract: The invention relates to a process for producing a tubular glass membrane with wall thicknesses between 5 and 30 microns and reproducible pore sizes between 11 A and 50 A. Alkali borosilicate glass is drawn into discrete hollow tubes and immediately cooled. The tubes are thermally treated to effect a phase separation into a coherent silicon dioxide phase and a boron oxide phase rich in alkali borate. The boron oxide phase is leached out with mineral acid. The tubes can be subsequently treated to give enlarged or reduced pores, asymmetric pores and coated surfaces.
    Type: Grant
    Filed: November 13, 1975
    Date of Patent: August 16, 1977
    Assignee: Jenaer, Glaswerk, Schott & Gen.
    Inventors: Roland Schnabel, Alexander Holzel, Kurt Gotter