Patents by Inventor Werner Borer

Werner Borer 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).

  • Device for rounding off granular particles of solid material
    Patent number: 4592707
    Abstract: Granular solid particles, in particular hard, comminuted material of any given shape, are kept continuously in relative movement in a funnel-shaped container by means of a stream of liquid whereby they are rounded off. The rounded-off particles are suitable as filler material for wear-resistant coatings.
    Type: Grant
    Filed: April 12, 1984
    Date of Patent: June 3, 1986
    Assignee: Swiss Aluminium Ltd.
    Inventors: Werner Borer, Janos Lukacs, Hugo Spalinger
  • Process for rounding off granular particles of solid material
    Patent number: 4476071
    Abstract: Granular solid particles, in particular hard, comminuted material of any given shape, are kept continuously in relative movement in a funnel-shaped container by means of a stream of liquid whereby they are rounded off. The rounded-off particles are suitable as filler material for wear-resistant coatings.
    Type: Grant
    Filed: December 2, 1982
    Date of Patent: October 9, 1984
    Assignee: Swiss Aluminium Ltd.
    Inventors: Werner Borer, Janos Lukacs, Hugo Spalinger
  • Process for the production of coarse crystalline alumina
    Patent number: 4374119
    Abstract: The invention describes a process for the production of coarse crystalline alumina from aluminum hydroxide, which after preparation by known methods is advantageously useful for abrasives, lapping and polishing purposes or for refractory materials. The process is characterized by aluminum hydroxide, either directly or after previous partial dehydration in the range 200.degree.-550.degree. C., being added with a mineralizer of compound type x(BF.sub.4).sub.n, wherein x stands for NH.sub.4 and metallic elements and n is for the formal valence of x, and subsequently is subjected to an elevated temperature treatment between 750.degree. C. and a value higher than the phase change temperature to .alpha.-Al.sub.2 O.sub.3.
    Type: Grant
    Filed: September 16, 1981
    Date of Patent: February 15, 1983
    Assignee: Swiss Aluminium Ltd.
    Inventors: Bernhard Schepers, Volker Nobbe, Bernd Schroder, Werner Borer, Manfred Kullack