Patents by Inventor Royston Esler Starkey

Royston Esler Starkey 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).

  • Clay pigeons
    Patent number: 6715759
    Abstract: A method of making clay pigeons is disclosed involving the step of compacting a dry powder comprising an inorganic filler comprising more than 50% by weight calcium carbonate and a binder. Also disclosed is a dry pressed pitchless clay pigeon.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: April 6, 2004
    Assignee: Gurney Slade Lime & Stone Company, Limited
    Inventors: Stanley Briers Gladders, Royston Esler Starkey
  • Clay pigeons
    Publication number: 20030050391
    Abstract: A method of making clay pigeons is disclosed involving the step of compacting a dry powder comprising an inorganic filler comprising more than 50% by weight calcium carbonate and a binder. Also disclosed is a dry pressed pitchless clay pigeon.
    Type: Application
    Filed: September 9, 2002
    Publication date: March 13, 2003
    Inventors: Stanley Briers Gladders, Royston Esler Starkey