Patents by Inventor Chull Hee Oh
Chull Hee Oh 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: 11224916Abstract: A method of producing a powder suitable for additive manufacturing and/or powder metallurgy applications from a precursor particulate material comprising: subjecting the precursor particulate material to at least one high shear milling process, thereby producing a powder product having a reduced average particle size and a selected particle morphology.Type: GrantFiled: September 27, 2019Date of Patent: January 18, 2022Assignee: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATIONInventors: Chull Hee Oh, Stefan Gulizia
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Patent number: 11034098Abstract: A composite lay up tool comprising a metal faceplate (12) on a support member (13), wherein the faceplate has been formed by cold-gas dynamic spraying of particles of the metal onto a substrate and wherein the support member is compatible with the faceplate and comprises a casting of a ceramic composition. A process for forming the tool is disclosed. In one aspect, a castable ceramic composition comprises a binder and an aggregate component mixable with water to form a slurry ready for casting, wherein the aggregate component is one of, or a mixture of, fused silica and a particulate metal alloy, and the binder and aggregate component are present in the proportions 10-50 wt % and 90-50 wt % based on the dry weight of the composition.Type: GrantFiled: June 6, 2018Date of Patent: June 15, 2021Assignee: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATIONInventors: Stefan Gulizia, Mahnaz Jahedi, Chull Hee Oh, Enzo Luccio Stefano Salvatore Gulizia
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Publication number: 20200023439Abstract: A method of producing a powder suitable for additive manufacturing and/or powder metallurgy applications from a precursor particulate material comprising: subjecting the precursor particulate material to at least one high shear milling process, thereby producing a powder product having a reduced average particle size and a selected particle morphology.Type: ApplicationFiled: September 27, 2019Publication date: January 23, 2020Applicant: Commonwealth Scientific and Industrial Research OrganisationInventors: Chull Hee OH, Stefan GULIZIA
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Patent number: 10471512Abstract: A method of producing a powder suitable for additive manufacturing and/or powder metallurgy applications from a precursor particulate material comprising: subjecting the precursor particulate material to at least one high shear milling process, thereby producing a powder product having a reduced average particle size and a selected particle morphology.Type: GrantFiled: June 16, 2015Date of Patent: November 12, 2019Assignee: Commonwealth Scientific and Industrial Research OrganisationInventors: Chull Hee Oh, Stefan Gulizia
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Publication number: 20180281317Abstract: A composite lay up tool comprising a metal faceplate (12) on a support member (13), wherein the faceplate has been formed by cold-gas dynamic spraying of particles of the metal onto a substrate and wherein the support member is compatible with the faceplate and comprises a casting of a ceramic composition. A process for forming the tool is disclosed. In one aspect, a castable ceramic composition comprises a binder and an aggregate component mixable with water to form a slurry ready for casting, wherein the aggregate component is one of, or a mixture of, fused silica and a particulate metal alloy, and the binder and aggregate component are present in the proportions 10-50 wt % and 90-50 wt % based on the dry weight of the composition.Type: ApplicationFiled: June 6, 2018Publication date: October 4, 2018Inventors: Stefan Gulizia, Mahnaz Jahedi, Chull Hee Oh, Enzo Luccio Stefano Salvatore Gulizia
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Publication number: 20170197250Abstract: A method of producing a powder suitable for additive manufacturing and/or powder metallurgy applications from a precursor particulate material comprising: subjecting the precursor particulate material to at least one high shear milling process, thereby producing a powder product having a reduced average particle size and a selected particle morphology.Type: ApplicationFiled: June 16, 2015Publication date: July 13, 2017Applicant: Commonwealth Scientific and Industrial Research OrganisationInventors: Chull Hee OH, Stefan GULIZIA
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Publication number: 20150165697Abstract: A composite lay up tool comprising a metal faceplate (12) on a support member (13), wherein the faceplate has been formed by cold-gas dynamic spraying of particles of the metal onto a substrate and wherein the support member is compatible with the faceplate and comprises a casting of a ceramic composition. A process for forming the tool is disclosed. In one aspect, a castable ceramic composition comprises a binder and an aggregate component mixable with water to form a slurry ready for casting, wherein the aggregate component is one of or a mixture of fused silica and a particulate metal alloy, and the binder and aggregate component are present in the proportions 10-50 wt % and 90-50 wt % based on the dry weight of the composition.Type: ApplicationFiled: August 20, 2013Publication date: June 18, 2015Applicant: Commonwealth Scientific and Industrial Research OrganisationInventors: Stefan Gulizia, Mahnaz Jahedi, Chull Hee Oh, Enzo Luccio Stefano Salvatore Gulizia
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Patent number: 8093315Abstract: A method of improving the wear resistance of a polymer is disclosed comprising the steps of evenly dispersing an ultrafine inorganic particulate material in the polymer at a loading rate of 0.01 to 20 wt % of the total weight of the particulate polymer composite. The mixing or dispersing is preferably carried out under sub-atmospheric pressure conditions to ensure little or no bubbles form in the mixture prior to curing.Type: GrantFiled: October 10, 2003Date of Patent: January 10, 2012Assignee: Commonwealth Scientific and Industrial Research OrganisationInventors: Daniel Bell, Phil Casey, Yesim Gozukara, Anita Hill, James Mardel, Tracey Markley, Pavla Meakin, Chull Hee Oh, Terry Turney
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Publication number: 20090029034Abstract: A coating system, for use in reducing air burn oxidation of a carbon anode of an aluminium electrolytic smelter, includes a pre-coat and a top coat which together enable protection of the anode when applied thereover. The pre-coat contains finely divided carbonaceous material dispersed in a solution of a suitable binder. The top coat contains finely divided particulate material, comprising at least one of alumina and cryolite, dispersed in a solution of a suitable binder.Type: ApplicationFiled: October 27, 2005Publication date: January 29, 2009Inventors: Mahnaz Jahedi, Enzo Gulizia, Chull Hee Oh, Stefan Gulizia
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Patent number: 5855842Abstract: A process for the production of dense polycrystalline silicon carbide shaped articles; includes (a) heating a powder compact containing silicon carbide and alumina or a precursor thereof to an intermediate temperature, and maintaining the said intermediate temperature for an extended dwell, and then (b) heating the product of step (a) to a higher temperature for sufficient time to produce a dense polycrystalline silicon carbide product.Type: GrantFiled: October 9, 1997Date of Patent: January 5, 1999Assignee: Commonwealth Scientific and Industrial Research OrganisationInventors: Mark Brian Trigg, Chull Hee Oh
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Patent number: 5855841Abstract: A process for the production of dense polycrystalline silicon carbide shaped articles, includes the steps: (a) heating a powder compact containing silicon carbide and alumina or a precursor thereof together with a secondary sintering assist, to an intermediate temperature for an extended dwell, and then (b) heating the product of step (a) to a higher temperature for sufficient time to produce a dense polycrystalline silicon carbide product. The secondary sintering assist includes one or more rare earths or their precursors, for example scandia, yttria or dysprosia.Type: GrantFiled: September 19, 1996Date of Patent: January 5, 1999Assignee: Commonwealth Scientific and Industrial Research OrganisationInventors: Mark Brian Trigg, Chull Hee Oh, Nick Rigopoulos