Patents by Inventor Melvin A. Leitheiser

Melvin A. Leitheiser 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).

  • Articles containing non-fused aluminum oxide-based abrasive mineral
    Patent number: 4518397
    Abstract: The invention relates to synthetic, non-fused, aluminum oxide-based abrasive mineral having a microcrystalline structure of randomly oriented crystallites comprising a dominant continuous phase of .alpha.-alumina and a secondary phase, to a method of making the same employing chemical ceramic technology, and to abrasive articles made with the abrasive mineral.
    Type: Grant
    Filed: May 17, 1983
    Date of Patent: May 21, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Melvin A. Leitheiser, Harold G. Sowman
  • Non-fused aluminum oxide-based abrasive mineral
    Patent number: 4314827
    Abstract: The invention relates to synthetic, non-fused, aluminum oxide-based abrasive mineral having a microcrystalline structure of randomly oriented crystallites comprising a dominant continuous phase of .alpha.-alumina and a secondary phase, to a method of making the same employing chemical ceramic technology, and to abrasive articles made with the abrasive mineral.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: February 9, 1982
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Melvin A. Leitheiser, Harold G. Sowman