Patents by Inventor Ivor Rex Harris
Ivor Rex Harris 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).
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Patent number: 11270840Abstract: A process is provided for the production of rare earth magnets comprising the steps of exposing a rare earth alloy to hydrogen gas at an elevated temperature so as to effect hydrogenation and disproportionation of the alloy, mechanically processing the disproportionated alloy, and degassing the processed alloy so as to effect hydrogen desorption and recombination of the alloy. The process of the invention finds use in the production and shaping of rare earth magnets, and may be particularly applicable to the production of thin magnetic sheets.Type: GrantFiled: July 1, 2016Date of Patent: March 8, 2022Assignee: The University of BirminghamInventors: Ivor Rex Harris, Allan Walton, Oliver Peter Brooks
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Publication number: 20180190428Abstract: A process is provided for the production of rare earth magnets comprising the steps of exposing a rare earth alloy to hydrogen gas at an elevated temperature so as to effect hydrogenation and disproportionation of the alloy, mechanically processing the disproportionated alloy, and degassing the processed alloy so as to effect hydrogen desorption and recombination of the alloy. The process of the invention finds use in the production and shaping of rare earth magnets, and may be particularly applicable to the production of thin magnetic sheets.Type: ApplicationFiled: July 1, 2016Publication date: July 5, 2018Applicant: The University of BirminghamInventors: Ivor Rex Harris, Allan Walton, Oliver Peter Brooks
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Patent number: 9663843Abstract: The present invention discloses a method for recovering rare earth particulate material from an assembly comprising a rare earth magnet and comprises the steps of exposing the assembly to hydrogen gas to effect hydrogen decrepitation of the rare earth magnet to produce a rare earth particulate material, and separating the rare earth particulate material from the rest of the assembly. The invention also resides in an apparatus for separating rare earth particulate material from an assembly comprising a rare earth magnet. The apparatus comprises a reaction vessel having an opening which can be closed to form a gas-tight seal, a separator for separating the rare earth particulate material from the assembly, and a collector for collecting the rare earth particulate material. The reaction vessel is connected to a vacuum pump and a gas control system, and the gas control system controls the supply of hydrogen gas to the reaction vessel.Type: GrantFiled: May 31, 2013Date of Patent: May 30, 2017Assignee: The University of BirminghamInventors: Ivor Rex Harris, Allan Walton, John D. Speight
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Patent number: 8734714Abstract: The present invention discloses a method for recovering rare earth particulate material from an assembly comprising a rare earth magnet and comprises the steps of exposing the assembly to hydrogen gas to effect hydrogen decrepitation of the rare earth magnet to produce a rare earth particulate material, and separating the rare earth particulate material from the rest of the assembly. The invention also resides in an apparatus for separating rare earth particulate material from an assembly comprising a rare earth magnet. The apparatus comprises a reaction vessel having an opening which can be closed to form a gas-tight seal, a separation means for separating the rare earth particulate material from the assembly, and a collection means for collecting the rare earth particulate material. The reaction vessel is connected to a vacuum pump and a gas control system, and the gas control system controls the supply of hydrogen gas to the reaction vessel.Type: GrantFiled: June 27, 2011Date of Patent: May 27, 2014Assignee: The University of BirminghamInventors: Ivor Rex Harris, Andrew Williams, Allan Walton, John Speight
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Publication number: 20130263699Abstract: The present invention discloses a method for recovering rare earth particulate material from an assembly comprising a rare earth magnet and comprises the steps of exposing the assembly to hydrogen gas to effect hydrogen decrepitation of the rare earth magnet to produce a rare earth particulate material, and separating the rare earth particulate material from the rest of the assembly. The invention also resides in an apparatus for separating rare earth particulate material from an assembly comprising a rare earth magnet. The apparatus comprises a reaction vessel having an opening which can be closed to form a gas-tight seal, a separator for separating the rare earth particulate material from the assembly, and a collector for collecting the rare earth particulate material. The reaction vessel is connected to a vacuum pump and a gas control system, and the gas control system controls the supply of hydrogen gas to the reaction vessel.Type: ApplicationFiled: May 31, 2013Publication date: October 10, 2013Inventors: Ivor Rex Harris, Andrew Williams, Allan Walton, John D. Speight
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Publication number: 20120137829Abstract: The present invention discloses a method for recovering rare earth particulate material from an assembly comprising a rare earth magnet and comprises the steps of exposing the assembly to hydrogen gas to effect hydrogen decrepitation of the rare earth magnet to produce a rare earth particulate material, and separating the rare earth particulate material from the rest of the assembly. The invention also resides in an apparatus for separating rare earth particulate material from an assembly comprising a rare earth magnet. The apparatus comprises a reaction vessel having an opening which can be closed to form a gas-tight seal, a separation means for separating the rare earth particulate material from the assembly, and a collection means for collecting the rare earth particulate material. The reaction vessel is connected to a vacuum pump and a gas control system, and the gas control system controls the supply of hydrogen gas to the reaction vessel.Type: ApplicationFiled: June 27, 2011Publication date: June 7, 2012Inventors: Ivor Rex Harris, Andrew Williams, Allan Walton, John Speight
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Patent number: 6399146Abstract: This invention, in one aspect, relates to a method of applying a corrosion-resistant coating on an article and is particularly, but not exclusively, concerned with a method of applying a corrosion-resistant coating on an Nd—Fe—B magnet. In another aspect, the present invention relates to a method of applying a coherent coating on the surfaces of the particles of a powder. Such powder may be one which is susceptible to oxidative corrosion and/or one which is used to form a magnet (e.g Nd—Fe—B powder).Type: GrantFiled: November 10, 2000Date of Patent: June 4, 2002Assignee: The University of BirminghamInventors: Ivor Rex Harris, John D. Speight
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Patent number: 6165643Abstract: A hydrogen storage material comprising hydride-forming metallic particles and an interface activation composition, wherein the surface of at least some of the hydride-forming metallic particles have a discontinuous or partial deposit of said interface activation composition, such as one or more platinum group metals, is disclosed. The hydrogen storage material demonstrates improved kinetic and oxidation parameters over untreated particles.Type: GrantFiled: January 4, 2000Date of Patent: December 26, 2000Assignee: Johnson Matthey Public Limited CompanyInventors: Mark Laurence Doyle, Ivor Rex Harris, Allin Sidney Pratt, David Benjamin Willey
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Patent number: 5858265Abstract: Barium, strontium and/or rare earth metal hexaferrite powder of low coercivity can be produced by subjecting a barium, strontium and/or rare earth metal hexaferrite powder to carburising, nitriding, carbonitriding, hydriding or carbohydriding conditions without undue loss of saturation magnetisation. High coercivity powder can be produced by calcining the low coercivity powder (FIG. 1). High remanence and high saturation magnetisation powder can be produced by mechanically alloying of a Sr--, Ba and/or rare earth metal hexaferrite powder with iron powder (FIG. 12).Type: GrantFiled: July 28, 1997Date of Patent: January 12, 1999Assignee: The University of BirminghamInventors: Abolghasem Ataie, Ivor Rex Harris, Clive Brian Ponton