Patents by Inventor Colin F. W. Norman

Colin F. W. Norman 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).

  • Magnetic recording medium with a binder resin of a starblock copolymer having at least six arms
    Patent number: 5487951
    Abstract: Magnetic recording medium of the type comprising magnetizable particles dispersed in a binder, wherein the binder comprises a star block copolymer having an average of at least six arms.
    Type: Grant
    Filed: January 7, 1994
    Date of Patent: January 30, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Christopher M. Evans, Colin F. W. Norman
  • Magnetic recording medium having a metallic magnetic thin film layer, a primer layer comprising an amino alkoxysilane and a lubricant layer comprising a functional perfluoropolyether
    Patent number: 5178954
    Abstract: A two-layer protective coating covers a metallic thin film magnetic recording medium of a magnetic recording element. The two-layer protective coating comprises a primer layer proximal to the metallic thin film magnetic recording medium. The primer layer comprises an amino functional alkoxy silane and a copolymerizable monomer. The copolymerizable monomer comprises a plurality of vinyl groups. The two-layer protective coating also comprises a lubricant layer distal from the metallic thin film magnetic recording medium. The lubricant layer comprises a functional perfluoropolyether.
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: January 12, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Colin F. W. Norman, Timothy G. E. Swales