Patents by Inventor Michael C. Harper
Michael C. Harper 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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Publication number: 20230219195Abstract: Methods of making polymer bond abrasive articles and their precursors using powder bed jetting are disclosed. Polymer bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, unitary structured abrasive discs, abrasive segments, shaped abrasive particles, and abrasive wheels.Type: ApplicationFiled: March 8, 2023Publication date: July 13, 2023Inventors: Robert L.W. Smithson, Brian D. Goers, Brian A. Shukla, Michael C. Harper
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Patent number: 11623324Abstract: Methods of making polymer bond abrasive articles and their precursors using powder bed jetting are disclosed. Polymer bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, unitary structured abrasive discs, abrasive segments, shaped abrasive particles, and abrasive wheels.Type: GrantFiled: December 13, 2017Date of Patent: April 11, 2023Assignee: 3M Innovative Properties CompanyInventors: Robert L. W. Smithson, Brian D. Goers, Brian A. Shukla, Michael C. Harper
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Patent number: 11607841Abstract: A method of forming a vitreous bond abrasive article is presented that includes receiving, by a manufacturing device having one or more processors, a digital object comprising data specifying a plurality of layers of a vitreous bond abrasive article precursor. The vitreous bond abrasive article precursor includes abrasive particles bonded together by a vitreous bond precursor material and an organic compound. The vitreous bond abrasive article precursor further comprises at least one of: at least one tortuous cooling channel extending at least partially through the vitreous bond abrasive article precursor or at least one arcuate cooling channel extending at least partially through the vitreous bond abrasive article precursor. The method also includes generating, with the manufacturing device by an additive manufacturing process, the vitreous bond abrasive article precursor based on the digital object.Type: GrantFiled: June 23, 2021Date of Patent: March 21, 2023Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Carsten Franke, Maiken Givot, Malte Korten, Robert L. W. Smithson, Brian D. Goers, Negus B. Adefris, Thomas J. Anderson, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Patent number: 11597058Abstract: Methods of making metal bond abrasive articles via powder bed jetting are disclosed. Metal bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, abrasive segments, abrasive wheels, and rotary dental tools.Type: GrantFiled: December 11, 2020Date of Patent: March 7, 2023Assignee: 3M Innovative Properties CompanyInventors: Carsten Franke, Brian D. Goers, Robert L. W. Smithson, Negus B. Adefris, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Patent number: 11577458Abstract: An additive layer manufacturing method, preferably using selective laser sintering, for manufacturing a solid article, the method including applying a layer of a powder, the powder including at least one powdered (co)polymer, onto a solid substrate in a processing chamber; fusing the powder layer onto the solid substrate; subsequently depositing successive layers of the powder, wherein each successive layer is selectively fused prior to deposition of the subsequent layer of powder so as to form the article. In some embodiments, the powder further includes abrasive particles having a hardness greater than or equal to that of aluminum oxide.Type: GrantFiled: June 27, 2019Date of Patent: February 14, 2023Assignee: 3M Innovative Properties CompanyInventors: Jean-Luc Rifaut, Jens Eichler, Tilo Remhof, Brian D. Goers, Brian A. Shukla, Alexander J. Kugel, Maiken Givot, Michael C. Harper
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Publication number: 20210362297Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform.Type: ApplicationFiled: June 23, 2021Publication date: November 25, 2021Inventors: Carsten Franke, Maiken Givot, Malte Korten, Robert L.W. Smithson, Brian D. Goers, Negus B. Adefris, Thomas J. Anderson, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Publication number: 20210316503Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform.Type: ApplicationFiled: June 23, 2021Publication date: October 14, 2021Inventors: Carsten Franke, Maiken Givot, Malte Korten, Robert L.W. Smithson, Brian D. Goers, Negus B. Adefris, Thomas J. Anderson, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Publication number: 20210245433Abstract: An additive layer manufacturing method, preferably using selective laser sintering, for manufacturing a solid article, the method including applying a layer of a powder, the powder including at least one powdered (co)polymer, onto a solid substrate in a processing chamber; fusing the powder layer onto the solid substrate; subsequently depositing successive layers of the powder, wherein each successive layer is selectively fused prior to deposition of the subsequent layer of powder so as to form the article. In some embodiments, the powder further includes abrasive particles having a hardness greater than or equal to that of aluminum oxide.Type: ApplicationFiled: June 27, 2019Publication date: August 12, 2021Inventors: Jean-Luc Rifaut, Jens Eichler, Tilo Remhof, Brian D. Goers, Brian A. Shukla, Alexander J. Kugel, Maiken Givot, Michael C. Harper
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Patent number: 11072053Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform.Type: GrantFiled: January 18, 2017Date of Patent: July 27, 2021Assignee: 3M Innovative Properties CompanyInventors: Carsten Franke, Maiken Givot, Malte Korten, Robert L. W. Smithson, Brian D. Goers, Negus B. Adefris, Thomas J. Anderson, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Patent number: 11072115Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. An abrasive article preform is produced by an additive manufacturing sub-process comprising the deposition of a layer of loose powder particles in a confined region and selective heating via conduction or irradiation to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The abrasive article preform produced by additive manufacturing is subsequently heated to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. Also, the methods include receiving, by an additive manufacturing device having a processor, a digital object specifying data for an abrasive article, and generating the abrasive article with the manufacturing device.Type: GrantFiled: March 30, 2017Date of Patent: July 27, 2021Assignee: 3M Innovative Properties CompanyInventors: Carsten Franke, Maiken Givot, Malte Korten, Robert L. W. Smithson, Brian D. Goers, Negus B. Adefris, Thomas J. Anderson, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Publication number: 20210094149Abstract: Methods of making metal bond abrasive articles via powder bed jetting are disclosed. Metal bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, abrasive segments, abrasive wheels, and rotary dental tools.Type: ApplicationFiled: December 11, 2020Publication date: April 1, 2021Inventors: Carsten Franke, Brian D. Goers, Robert L.W. Smithson, Negus B. Adefris, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Patent number: 10888973Abstract: Methods of making metal bond abrasive articles via powder bed jetting are disclosed. Metal bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, abrasive segments, abrasive wheels, and rotary dental tools.Type: GrantFiled: June 16, 2016Date of Patent: January 12, 2021Assignee: 3M Innovative Properties CompanyInventors: Carsten Franke, Brian D. Goers, Robert L. W. Smithson, Negus B. Adefris, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Publication number: 20200070311Abstract: Methods of making polymer bond abrasive articles and their precursors using powder bed jetting are disclosed. Polymer bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, unitary structured abrasive discs, abrasive segments, shaped abrasive particles, and abrasive wheels.Type: ApplicationFiled: December 13, 2017Publication date: March 5, 2020Inventors: Robert L.W. Smithson, Brian D. Goers, Brian A. Shukla, Michael C. Harper
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Publication number: 20190047214Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. An abrasive article preform is produced by an additive manufacturing sub-process comprising the deposition of a layer of loose powder particles in a confined region and selective heating via conduction or irradiation to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The abrasive article preform produced by additive manufacturing is subsequently heated to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. Also, the methods include receiving, by an additive manufacturing device having a processor, a digital object specifying data for an abrasive article, and generating the abrasive article with the manufacturing device.Type: ApplicationFiled: March 30, 2017Publication date: February 14, 2019Inventors: Carsten Franke, Maiken Givot, Malte Korten, Robert L.W. Smithson, Brian D. Goers, Negus B. Adefris, Thomas J. Anderson, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Publication number: 20190022826Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform.Type: ApplicationFiled: January 18, 2017Publication date: January 24, 2019Inventors: Carsten Franke, Maiken Givot, Malte Korten, Robert L.W. Smithson, Brian D. Goers, Negus B. Adefris, Thomas J. Anderson, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Publication number: 20180126515Abstract: Methods of making metal bond abrasive articles via powder bed jetting are disclosed. Metal bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, abrasive segments, abrasive wheels, and rotary dental tools.Type: ApplicationFiled: June 16, 2016Publication date: May 10, 2018Inventors: Carsten Franke, Brian D. Goers, Robert L.W. Smithson, Negus B. Adefris, Brian A. Shukla, Michael C. Harper, Elizaveta Y. Plotnikov
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Patent number: 4414131Abstract: A novel nematic liquid crystalline composition is provided. A novel liquid crystalline chiral compound, (+)5-(2-methyl) butyl-2(4-cyanophenyl)-1, 3-dioxane, is also provided. When admixed together, these novel components form a phase-change cholesteric liquid crystalline composition which is highly useful as the host medium in a guest-host electrooptical display as a result of its low electrical threshold and optical saturation voltages, steep saturation curve, relatively low optical birefringence, low viscosity and broad liquid crystalline mesomorphic range.The host medium in conjunction with a suitable pleochroic dye provides an improved guest-host composition which exhibits a contrast of greater than 3:1 in certain displays, especially those having liquid crystal alignment layer means providing a moderate tilt angle of 10.degree.-40.degree. at the substrate/guest-host composition interface.Type: GrantFiled: January 13, 1983Date of Patent: November 8, 1983Assignee: Timex CorporationInventors: Nicholas L. Sethofer, Michael C. Harper