Patents by Inventor Lloyd R. Darroch

Lloyd R. Darroch 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).

  • Patent number: 4138524
    Abstract: A method of forming an article defining an integral protective surface comprising providing a mould defining at least that face of the article to be formed with the protective surface, inserting a plurality of minute hard chemically inactive spheroidal members into a medium bonding substance of less specific gravity than the spheroidal members and in which the article, at least that part of the article at the relevant surface, is to be moulded, maneuvering the mould and placing the bonding substance therein, before or after the spheroidal members have been inserted, so as to cause the spheroidal members by their density displacing the bonding substance to migrate to form a compact layer at the aforementioned surface and allowing the substance to harden to retain the spheroidal members at that surface.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: February 6, 1979
    Assignee: Aakronite Decoratives Limited
    Inventor: Lloyd R. Darroch