Patents by Inventor Douglas G. Pedrotty

Douglas G. Pedrotty 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).

  • Heat curing and subsequent calendering to produce magnetic recording media
    Patent number: 7314647
    Abstract: A method for producing a magnetic recording medium includes heat-curing a coated substrate to cure a non-magnetic back coat on the substrate and to cure a magnetic front coat on the substrate, and calendering the heat-cured coated substrate to produce the magnetic recording medium. The calendering optionally is off-line calendering during which the substrate passes between opposed, generally non-compliant rolls. Other methods, and magnetic recording media produced by the disclosed methods, also are disclosed.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: January 1, 2008
    Assignee: Imation Corp.
    Inventors: Bruce H. Edwards, Roger J. Mandt, David J. Owen, Brian D. Brong, Nang T. Tran, Douglas G. Pedrotty
  • Opaque polyester film containing fine carbon black particles
    Patent number: 4603073
    Abstract: A magnetic recording medium has a biaxially-oriented polyester film base which includes carbon black beads having a median diameter from 50 to 500 nm and is substantially free from beads or agglomerates more than 5 micrometers in diameter. The beads provide opacity such as is often required of the flexible recording disk of a diskette. The film base may be either a single layer, throughout which the beads are uniformly dispersed, or it may be multi-layer, e.g., a central layer containing the carbon black beads and two surface layers which are free from the beads.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: July 29, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Brenda L. Renalls, Douglas G. Pedrotty, John F. Donlon
  • Magnetic recording medium having opaque polyester film base
    Patent number: 4546036
    Abstract: A magnetic recording medium has a biaxially-oriented polyester film base which includes carbon black beads having a median diameter from 50 to 500 nm and is substantially free from beads or agglomerates more than 5 micrometers in diameter. The beads provide opacity such as is often required of the flexible recording disk of a diskette. The film base may be either a single layer, throughout which the beads are uniformly dispersed, or it may be multi-layer, e.g., a central layer containing the carbon black beads and two surface layers which are free from the beads.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: October 8, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Brenda L. Renalls, Douglas G. Pedrotty, John F. Donlan