Patents by Inventor James H. O'Brien

James H. O'Brien 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).

  • Method of forming stable dispersions of alumina
    Patent number: 3954659
    Abstract: Stable aqueous dispersions of alumina are formed at concentrations of above about 25% Al.sub.2 O.sub.3 by dispersing alumina dried with a strongly acidic solution. Said stable aqueous dispersions of alumina are stable for at least 2.5 months.
    Type: Grant
    Filed: February 5, 1974
    Date of Patent: May 4, 1976
    Assignee: Philadelphia Quartz Company
    Inventor: James H. O'Brien
  • Data storage disk drive housing
    Patent number: D401229
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: November 17, 1998
    Assignee: Storage Computer Corporation
    Inventors: Kurt S. Roehrs, James H. O'Brien