Patents by Inventor Stephen Paul Hurford

Stephen Paul Hurford 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: 6383248
    Abstract: A wedding ring is manufactured by a process comprising the production of a metal powder by the atomizing of a stream of molten precious metal, for example a gold alloy, the compaction of the metal powder into a hollow cylindrical body, the sintering of the compacted body, optionally the compression of the sintered body into a more toroidal shape, optionally the sintering of the toroidal body and the subjecting of the body to ring-rolling and annealing. The powder that is compacted any also comprise a minor proportion of precious-metal powder obtained by means other than atomization. The process may also be applied to the manufacture of artifacts other than rings by compacting the powder into an appropriate shape and modifying the compressing step, if employed, as appropriate to the intended product; in such embodiments, the ring-rolling step may be replaced by an appropriate step of further modifying the shape and/or dimension of the body. or may be omitted entirely.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: May 7, 2002
    Assignee: Engelhard-CLAL UK Ltd.
    Inventors: Terence Ernest Taylor, Stephen Paul Hurford