Patents by Inventor Leonard Leese

Leonard Leese 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 making watermarks on synthetic paper
    Patent number: 5536468
    Abstract: A process is provided for creating a watermark on a polymeric sheet. The sheet is passed between abutting rollers, at least one of said rollers having a recessed and/or raised motif, to form an impression on the sheet corresponding to the motif, and then orienting by stretching the sheet. The impressed and oriented sheet has dark areas corresponding to the raised portions and light areas corresponding to recessed portion of the motif.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: July 16, 1996
    Assignee: Arjobex Limited
    Inventor: Leonard Leese
  • Web-stretching process
    Patent number: 4652409
    Abstract: A process for producing a stretched web of plastics material wherein a web of plastics material is passed through an apparatus in which the web, gripped at its edges by web gripping devices mounted on carriages which run on guide rails is stretched by increasing the distance between adjacent gripping devices by altering the degree of extension of an articulated chain to which the carriages are attached.
    Type: Grant
    Filed: November 23, 1984
    Date of Patent: March 24, 1987
    Assignee: Bakelite Xylonite Limited
    Inventors: Leonard Leese, Donald C. Nicholas, Gordon C. R. Smith, Geoffrey F. Stokes
  • Plastics shaped articles
    Patent number: 4151159
    Abstract: A plastics composition comprising an olefin polymer, a styrene or methyl-substituted styrene polymer, a butyl rubber and optionally an ethylene/vinyl polymer, which composition can be stretched to form a paper-like sheet.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: April 24, 1979
    Assignee: Bakelite Xylonite Limited
    Inventors: Charles L. Geall, Leonard Leese, Donald C. Nicholas, Gordon C. R. Smith, Geoffrey F. Stokes