Patents by Inventor Dennis Leonard Fox

Dennis Leonard Fox 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).

  • Substrate independent superpolishing process and slurry
    Patent number: 6801396
    Abstract: The present invention utilizes a combination of chemical and mechanical finishing processes to polish a disk substrate surface to near atomic smoothness. Broadly speaking, the surface of a disk substrate that has been machined (i.e., rough ground) to a predetermined surface roughness is subjected to attack by a chemical formulation (called an attacking agent). The chemical formulation is used to soften the substrate material. Then, the softened material is “wiped away” via mechanical action.
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: October 5, 2004
    Assignee: Hitachi Global Storage Technologies Netherlands B.B.
    Inventors: Brent Ray Den Hartog, Dennis Leonard Fox, James Aloysius Hagan, John Chen Shen, Kannimangalam Venkatasubramanyam Viswanathan
  • Substrate independent superpolishing process and slurry
    Patent number: 6236542
    Abstract: The present invention utilizes a combination of chemical and mechanical finishing processes to polish a disk substrate surface to near atomic smoothness. Broadly speaking, the surface of a disk substrate that has been machined (i.e., rough ground) to a predetermined surface roughness is subjected to attack by a chemical formulation (called an attacking agent). The chemical formulation is used to soften the substrate material. Then, the softened material is “wiped away” via mechanical action.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: May 22, 2001
    Assignee: International Business Machines Corporation
    Inventors: Brent Ray Den Hartog, Dennis Leonard Fox, James Aloysius Hagan, John Chen Shen, Kannimangalam Venkatasubramanyam Viswanathan