Patents by Inventor Warwick H. Gazzard

Warwick H. Gazzard 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).

  • Embossed patterning of asbestos-cement and like sheets
    Patent number: 4216043
    Abstract: To provide asbestos-cement and like sheets which are formed by build-up of a thin film on a rotating size roll, with an embossed patterned surface; a flexible mold layer of epoxy resin or like moldable material having counterpart embossments molded thereon, is removably wrapped about and secured to the size roll with its patterned side outward and before commencement of film build-up on the roll.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: August 5, 1980
    Assignee: James Hardie & Coy. Pty. Limited
    Inventors: Warwick H. Gazzard, Roger M. Kearin
  • Embossed patterning of asbestos-cement and like sheets
    Patent number: 4072460
    Abstract: To provide asbestos-cement and like sheets which are formed by build-up of a thin film on a rotating size roll, with an embossed patterned surface; a flexible mould layer of epoxy resin or like mouldable material having counterpart embossments moulded thereon, is removably wrapped about and secured to the size roll with its patterned side outward and before commencement of film build-up on the roll.
    Type: Grant
    Filed: November 6, 1975
    Date of Patent: February 7, 1978
    Assignee: James Hardie & Coy. Pty. Limited
    Inventors: Warwick H. Gazzard, Roger M. Kearin