Patents by Inventor Ian Richard Walters

Ian Richard Walters 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).

  • Gellable binders
    Patent number: 4102691
    Abstract: The present invention provides a method of producing a shaped object by coating a pattern with a slurry of a refractory powder in a binder. The binder comprises an acidic zirconium salt and also a gellation delaying agent. The slurry is caused to gell by contacting it with ammonia vapor.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: July 25, 1978
    Assignee: Zirconal Processes Limited
    Inventors: Ian Richard Walters, Harold Garton Emblem
  • Gellable binders
    Patent number: 4025350
    Abstract: The invention concerns the binding of refractory powders into self-supporting `green` shapes which are fired to provide refractory objects. In accordance with the invention the binders are based on zirconium salts and include a separate gell time delaying agent to ensure satisfactory gelling and to achieve control and to allow complex shapes to be made.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: May 24, 1977
    Assignee: Zirconal Processes Limited
    Inventors: Ian Richard Walters, Harold Garton Emblem
  • Method of manufacturing refractory articles
    Patent number: 4018858
    Abstract: The invention concerns the binding of refractory powders into self-supporting "green" shapes which are fired to provide refractory objects. In accordance with the invention the binders are based on zirconium salts and include a dispersion of calcined magnesia in a mixture of water and a polyhydric alcohol. The magnesia reacts with the zirconium salt to form zirconium oxide/hydroxide which gells hard. In order to control the speed of gelling a separate gell time delaying agent is also optionally included.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: April 19, 1977
    Assignee: Zirconal Processes Limited
    Inventors: Ian Richard Walters, Harold Garton Emblem