Patents by Inventor Irving W. Wolf

Irving W. Wolf 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).

  • Economical process for producing metal particles for magnetic recording
    Patent number: 4316738
    Abstract: Highly orientable acicular iron particles are made by reducing an acicular ferric oxide which has been formed into a porous matrix by combining it with sodium tripolyphosphate and reducing the oxide with hydrogen in the presence of a dehydrating agent.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: February 23, 1982
    Assignee: Ampex Corporation
    Inventors: Irving W. Wolf, Michael K. Stafford, Hillard M. Kahan, William F. Acebo, Lawrence M. Scott, Yu C. Lee
  • Particles for magnetic recording
    Patent number: 4268540
    Abstract: Improved particles for magnetic recording are provided by coating gamma ferric oxide with a mixture of barium, strontium, lead or calcium and a trivalent iron oxide. The particles have enhanced coercivity and the coercivity is relatively unaffected by elevated temperatures.
    Type: Grant
    Filed: February 13, 1980
    Date of Patent: May 19, 1981
    Assignee: Ampex Corporation
    Inventors: Lawrence M. Scott, Irving W. Wolf, Yu C. Lee