Patents by Inventor John D. Haas
John D. Haas 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: 20240010893Abstract: Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.Type: ApplicationFiled: September 25, 2023Publication date: January 11, 2024Inventors: John T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
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Patent number: 11767454Abstract: Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.Type: GrantFiled: April 4, 2018Date of Patent: September 26, 2023Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: John T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
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Publication number: 20210268627Abstract: The present disclosure provides an abrasive article (10). The abrasive article (10) has a direction of use, a y-axis and a z-axis orthogonal to the y-axis and the direction of use. The abrasive article (10) further includes a backing (12) and shaped abrasive particles attached to the backing. About 5% to about 100% of the shaped abrasive particles (14) independently include a first side surface (16), a second side surface (18) opposed to the first side surface (16), a leading surface (20) connected to the first side surface (16) at a first edge (24) and connected to the second side surface (18) at a second edge (26), a rake angle (30) between the backing (12) and the leading surface (20) in a range of from about 10 degrees to about 110 degrees, and a z-direction rotational angle (50) between a line (52) intersecting the first edge (16) and second edge (18) and the direction of use (22) of the abrasive article (10) in a range of from about 10 degrees to about 170 degrees.Type: ApplicationFiled: April 17, 2019Publication date: September 2, 2021Inventors: Negus B. Adefris, Scott R. Culler, Joseph B. Eckel, John D. Haas, Thomas J. Nelson, Aaron K. Nienaber, Steven J. Keipert, Vincent Jusuf, Fay T. Salmon, Yuzhi Xia, Michael J. Wald
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Patent number: 10987780Abstract: Shaped abrasive particles each having a sloping sidewall. Each of the shaped abrasive particles containing alpha alumina and having a first face and a second face separated by a thickness, t. The shaped abrasive particles further having a draft angle ? between the second face and the sloping sidewall, and the draft angle ? is between about 95 degrees to about 125 degrees.Type: GrantFiled: February 15, 2012Date of Patent: April 27, 2021Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Negus B. Adefris, Dwight D. Erickson, Scott R. Culler, John T. Boden, John D. Haas
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Patent number: 10293466Abstract: Structured abrasive articles include a backing and shaped abrasive composites secured to the backing. The shaped abrasive composites include abrasive grits dispersed in a binder matrix. The shaped abrasive composites include a bottom surface and a top surface opposite and not contacting the bottom surface, and at least three sidewalls abutting both the bottom and top surfaces and two other sidewalls. In one embodiment, at least two cusps are formed by the top surface and individual sidewalls. In another embodiment, the top surface includes at least two triangular facets that contact at least two respective sidewalls and at least two cusps. The top surface includes at least one interior recessed portion nearer the cusps than the bottom surface. Methods of abrading a workpiece using the structured abrasive article are also disclosed.Type: GrantFiled: November 4, 2014Date of Patent: May 21, 2019Assignee: 3M Innovative Properties CompanyInventors: John D. Haas, Negus B. Adefris, Scott R. Culler
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Publication number: 20190092990Abstract: Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.Type: ApplicationFiled: November 21, 2018Publication date: March 28, 2019Inventors: John T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
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Publication number: 20180223145Abstract: Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.Type: ApplicationFiled: April 4, 2018Publication date: August 9, 2018Inventors: John T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
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Patent number: 9938439Abstract: Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.Type: GrantFiled: May 6, 2014Date of Patent: April 10, 2018Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: John T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
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Patent number: 9890309Abstract: Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.Type: GrantFiled: May 6, 2014Date of Patent: February 13, 2018Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: John T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
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Publication number: 20160279762Abstract: Structured abrasive articles include a backing and shaped abrasive composites secured to the backing. The shaped abrasive composites include abrasive grits dispersed in a binder matrix. The shaped abrasive composites include a bottom surface and a top surface opposite and not contacting the bottom surface, and at least three sidewalls abutting both the bottom and top surfaces and two other sidewalls. In one embodiment, at least two cusps are formed by the top surface and individual sidewalls. In another embodiment, the top surface includes at least two triangular facets that contact at least two respective sidewalls and at least two cusps. The top surface includes at least one interior recessed portion nearer the cusps than the bottom surface. Methods of abrading a workpiece using the structured abrasive article are also disclosed.Type: ApplicationFiled: November 4, 2014Publication date: September 29, 2016Inventors: John D. Haas, Negus B. Adefris, Scott R. Culler
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Patent number: 9446502Abstract: Precursor alpha alumina abrasive particles in a mold are subjected to a drying process that cracks or fractures at least a majority of the precursor abrasive particles into at least two pieces thereby producing abrasive shards having a smaller size than the mold cavity from which they were made. The smaller abrasive shards, once formed, could be reassembled like jigsaw puzzle pieces to reproduce the original cavity shape of the mold from which they were made. The cracking or fracturing of the precursor abrasive particles is believed to occur by ensuring that the surface tension of the abrasive dispersion to the walls of the mold is greater than the internal attractive forces of the abrasive dispersion as the abrasive dispersion is dried within the mold cavity.Type: GrantFiled: September 8, 2011Date of Patent: September 20, 2016Assignee: 3M Innovative Properties CompanyInventors: Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John T. Boden, John D. Haas
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Patent number: 8845773Abstract: Abrasive particles which are shaped abrasive particles each with an opening are described. The shaped abrasive particles are formed from alpha alumina and have a first face and a second face separated by a thickness t. The opening in each of the shaped abrasive particles can improve grinding performance by reducing the size of a resulting wear flat, can provide a reservoir for grinding aid, and can improve adhesion to a backing in a coated abrasive article.Type: GrantFiled: February 16, 2012Date of Patent: September 30, 2014Assignee: 3M Innovative Properties CompanyInventors: Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John T. Boden, John D. Haas
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Publication number: 20140239148Abstract: Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.Type: ApplicationFiled: May 6, 2014Publication date: August 28, 2014Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: John T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
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Publication number: 20140237907Abstract: Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.Type: ApplicationFiled: May 6, 2014Publication date: August 28, 2014Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Boden T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
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Patent number: 8764865Abstract: Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.Type: GrantFiled: November 30, 2009Date of Patent: July 1, 2014Assignee: 3M Innovative Properties CompanyInventors: John T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
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Patent number: 8425278Abstract: A structured abrasive article comprises a backing, and an abrasive layer disposed on and secured to the backing. The abrasive layer comprises shaped abrasive composites, each comprising abrasive particles dispersed in a binder. Each the shaped abrasive composites independently comprises: a base disposed on the backing; a plurality of walls extending away from the base, and a grinding surface not contacting the base. Adjacent walls share a common edge. Each wall independently forms a dihedral angle with the base of less than or equal to 90 degrees. The grinding surface has a plurality of: cusps, and facets that contact a recessed feature. At least a portion of the recessed feature is disposed closer to the base than each of the cusps. Each cusp is formed by an intersection of two of the walls and at least one of the facets. Use of the structured abrasive article to abrade a workpiece is also disclosed.Type: GrantFiled: August 26, 2009Date of Patent: April 23, 2013Assignee: 3M Innovative Properties CompanyInventors: Scott R Culler, John D. Haas, Chaodi Li
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Publication number: 20120144754Abstract: Abrasive particles comprising dish-shaped abrasive particles each having a sidewall; each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a thickness, t; and wherein either the first face or the second face is recessed or concave.Type: ApplicationFiled: February 15, 2012Publication date: June 14, 2012Inventors: Scott R. Culler, Dwight D. Erickson, Negus B. Adefris, John T. Boden, John D. Haas
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Publication number: 20120144755Abstract: An abrasive comprising shaped abrasive particles each with an opening. The shaped abrasive particles are formed from alpha alumina and have a first face and a second face separated by a thickness t. The opening in each of the shaped abrasive particles can improve grinding performance by reducing the size of a resulting wear flat, can provide a reservoir for grinding aid, and can improve adhesion to a backing in a coated abrasive article.Type: ApplicationFiled: February 16, 2012Publication date: June 14, 2012Inventors: Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John T. Boden, John D. Haas
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Publication number: 20120137597Abstract: Abrasive particles comprising shaped abrasive particles each having a sloping sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a thickness, t. The shaped abrasive particles further comprising a draft angle ? between the second face and the sloping sidewall, and the draft angle ? is between about 95 degrees to about 125 degrees.Type: ApplicationFiled: February 15, 2012Publication date: June 7, 2012Inventors: Negus B. Adefris, Dwight D. Erickson, Scott R. Culler, John T. Boden, John D. Haas
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Patent number: 8142891Abstract: Abrasive particles comprising dish-shaped abrasive particles each having a sidewall; each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a thickness, t; and wherein either the first face or the second face is recessed or concave.Type: GrantFiled: December 17, 2008Date of Patent: March 27, 2012Assignee: 3M Innovative Properties CompanyInventors: Scott R. Culler, Dwight D. Erickson, Negus B. Adefris, John T. Boden, John D. Haas