Patents by Inventor John Siddon

John Siddon 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).

  • Process for the production of ferrous sulphide
    Patent number: 4775521
    Abstract: Ferrous sulphide is produced by forming a melt of a source of sulphur, suitably flotation grade iron pyrites, and a source of iron, suitably steel, in an electric induction furnace until reaction has ocurred, allowing a slag to form and removing the slag and pouring the residual ferrous sulphide product. Precautions are taken to protect the furnace circuitry from the pervasive effect of iron pyrites dust. The process may produce a ferrous sulphide product containing up to about 35% sulphur by weight with only low sulphur emission to the atmosphere.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: October 4, 1988
    Assignee: Laporte Industries Limited
    Inventors: John Siddon, Derek Mellor, Nigel Draper
  • Toilet seat lifting device
    Patent number: D458108
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: June 4, 2002
    Assignee: Cordeal, Ltd.
    Inventor: Peter John Siddons Corby