Patents by Inventor Kathryn R. Bretscher
Kathryn R. Bretscher 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: 11697185Abstract: An abrasive article includes a first abrasive element, a second abrasive element, a resilient element having first and second major surfaces, and a carrier. The first element and the second abrasive element each comprises a first major surface and a second major surface. At least the first major surfaces of the first and second abrasive elements comprise a plurality of precisely shaped features. The abrasive elements comprise substantially inorganic, monolithic structures.Type: GrantFiled: June 5, 2020Date of Patent: July 11, 2023Assignee: 3M Innovative Properties CompanyInventors: Duy K. Lehuu, Noah O. Shanti, Junqing Xie, Kathryn R. Bretscher
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Publication number: 20200298370Abstract: An abrasive article includes a first abrasive element, a second abrasive element, a resilient element having first and second major surfaces, and a carrier. The first element and the second abrasive element each comprises a first major surface and a second major surface. At least the first major surfaces of the first and second abrasive elements comprise a plurality of precisely shaped features. The abrasive elements comprise substantially inorganic, monolithic structures.Type: ApplicationFiled: June 5, 2020Publication date: September 24, 2020Inventors: Duy K. Lehuu, Noah O. Shanti, Junqing Xie, Kathryn R. Bretscher
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Patent number: 10710211Abstract: An abrasive article includes a first abrasive element, a second abrasive element, a resilient element having first and second major surfaces, and a carrier. The first element and the second abrasive element each comprises a first major surface and a second major surface. At least the first major surfaces of the first and second abrasive elements comprise a plurality of precisely shaped features. The abrasive elements comprise substantially inorganic, monolithic structures.Type: GrantFiled: July 31, 2013Date of Patent: July 14, 2020Assignee: 3M Innovative Properties CompanyInventors: Duy K. Lehuu, Noah O. Shanti, Junqing Xie, Kathryn R. Bretscher
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Patent number: 10265826Abstract: A method of forming a recess in a surface of a substrate includes: providing an abrasive article comprising a structured abrasive member disposed along a peripheral surface of a support member, frictionally contacting the structured abrasive layer with a surface of a substrate, longitudinally advancing the structured abrasive layer relative to the surface of the substrate; and rotating at least one of the abrasive article or the substrate relative to the other around a rotational axis perpendicular to the surface of the substrate such that the structured abrasive layer maintains contact with and abrades the surface of the substrate. The structured abrasive member comprises a structured abrasive layer comprising shaped abrasive composites secured to a backing, wherein the backing is proximate to the support member. The shaped abrasive composites comprise abrasive particles retained in a binder material.Type: GrantFiled: June 4, 2014Date of Patent: April 23, 2019Assignee: 3M Innovative Properties CompanyInventors: Bruce A. Sventek, Mitchell L. Nelson, David G. Baird, Kathryn R. Bretscher
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Patent number: 9956664Abstract: An abrasive element precursor includes a green body ceramic element having a first major surface, a second major surface, a plurality of inorganic particles, and a binder. At least the first major surface comprises a plurality of precisely shaped features. The plurality of inorganic particles is at least about 99% carbide ceramic by weight.Type: GrantFiled: July 31, 2013Date of Patent: May 1, 2018Assignee: 3M Innovative Properties CompanyInventors: Duy K. Lehuu, Noah O. Shanti, Junqing Xie, Kathryn R. Bretscher, Vincent W. Nehring
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Publication number: 20160129544Abstract: A method of forming a recess in a surface of a substrate includes: providing an abrasive article comprising a structured abrasive member disposed along a peripheral surface of a support member, frictionally contacting the structured abrasive layer with a surface of a substrate, longitudinally advancing the structured abrasive layer relative to the surface of the substrate; and rotating at least one of the abrasive article or the substrate relative to the other around a rotational axis perpendicular to the surface of the substrate such that the structured abrasive layer maintains contact with and abrades the surface of the substrate. The structured abrasive member comprises a structured abrasive layer comprising shaped abrasive composites secured to a backing, wherein the backing is proximate to the support member. The shaped abrasive composites comprise abrasive particles retained in a binder material.Type: ApplicationFiled: June 4, 2014Publication date: May 12, 2016Applicant: 3M Innovative Properties CompanyInventors: Bruce A. Sventek, Mitchell L. Nelson, David G. Baird, Kathryn R. Bretscher
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Publication number: 20160101499Abstract: An assembly may include a substrate defining at least one recess and a component located adjacent to the recess and attached to the substrate. In some examples, the recess may be formed by frictionally contacting a structured abrasive layer of an abrasive article with a surface of the substrate, longitudinally advancing the structured abrasive layer relative to the surface of the substrate, and rotating the substrate around a rotational axis substantially perpendicular to the surface of the substrate such that the structured abrasive layer maintains contact with and abrades the surface of the substrate thereby forming the recess therein. In some examples, the recess may be formed in the substrate after the component is attached to the substrate. Moreover, the recess may be formed without using added loose abrasive particles or abrasive slurry.Type: ApplicationFiled: May 28, 2014Publication date: April 14, 2016Inventors: Bruce A Sventek, Kathryn R. Bretscher, David G Baird, Lee A Fain, Mitchell L Nelson
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Publication number: 20150224625Abstract: An abrasive element includes a first major surface and a second major surface. At least the first major surface includes a plurality of precisely shaped features. The abrasive element includes at least about 99% of carbide ceramic by weight and has a porosity of less than about 5%.Type: ApplicationFiled: July 31, 2013Publication date: August 13, 2015Inventors: Duy K. Lehuu, Noah O. Shanti, Junqing Xie, Kathryn R. Bretscher, Vincent W. Nehring
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Publication number: 20150209932Abstract: An abrasive article includes a first abrasive element, a second abrasive element, a resilient element having first and second major surfaces, and a carrier. The first element and the second abrasive element each comprises a first major surface and a second major surface. At least the first major surfaces of the first and second abrasive elements comprise a plurality of precisely shaped features. The abrasive elements comprise substantially inorganic, monolithic structures.Type: ApplicationFiled: July 31, 2013Publication date: July 30, 2015Inventors: Duy K. Lehuu, Noah O. Shanti, Junqing Xie, Kathryn R. Bretscher
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Publication number: 20150209933Abstract: An abrasive element precursor includes a green body ceramic element having a first major surface, a second major surface, a plurality of inorganic particles, and a binder. At least the first major surface comprises a plurality of precisely shaped features. The plurality of inorganic particles is at least about 99% carbide ceramic by weight.Type: ApplicationFiled: July 31, 2013Publication date: July 30, 2015Inventors: Duy K. Lehuu, Noah O. Shanti, Junqing Xie, Kathryn R. Bretscher, Vincent W. Nehring
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Patent number: 7077649Abstract: Dental articles including at least one optical surface formed of a multilayer optical film including layers of at least one strain-induced birefringent material are disclosed. The multilayer optical films included in the dental articles is preferably post-formed into desired non-planar shapes in manners that result in some deformation of the optical stack of the multilayer optical films. A variety of dental implements can be constructed with multilayer optical film including dental mirrors, light guides for use in connection with photo-curing dental materials, and matrix bands for use in molding photo-curing dental restoratives.Type: GrantFiled: June 15, 2004Date of Patent: July 18, 2006Assignee: 3M Innovative Properties CompanyInventors: Kathryn R. Bretscher, Sumita B. Mitra, Olester Benson, Jr., James M. Jonza, William W. Merrill, Andrew J. Ouderkirk, Michael F. Weber, Janis R. Gust
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Publication number: 20040229187Abstract: Dental articles including at least one optical surface formed of a multilayer optical film including layers of at least one strain-induced birefringent material are disclosed. The multilayer optical films included in the dental articles is preferably post-formed into desired non-planar shapes in manners that result in some deformation of the optical stack of the multilayer optical films. A variety of dental implements can be constructed with multilayer optical film including dental mirrors, light guides for use in connection with photo-curing dental materials, and matrix bands for use in molding photo-curing dental restoratives.Type: ApplicationFiled: June 15, 2004Publication date: November 18, 2004Applicant: 3M Innovative Properties CompanyInventors: Kathryn R. Bretscher, Sumita B. Mitra, Olester Benson, James M. Jonza, William W. Merrill, Andrew J. Ouderkirk, Michael F. Weber, Janis R. Gust
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Patent number: 6749427Abstract: Dental articles including at least one optical surface formed of a multilayer optical film including layers of at least one strain-induced birefringent material are disclosed. The multilayer optical films included in the dental articles is preferably post-formed into desired non-planar shapes in manners that result in some deformation of the optical stack of the multilayer optical films. A variety of dental implements can be constructed with multilayer optical film including dental mirrors, light guides for use in connection with photo-curing dental materials, and matrix bands for use in molding photo-curing dental restoratives.Type: GrantFiled: July 31, 1998Date of Patent: June 15, 2004Assignee: 3M Innovative Properties CompanyInventors: Kathryn R. Bretscher, Sumita B. Mitra, Olester Benson, Jr., James M. Jonza, William W. Merrill, Andrew J. Ouderkirk, Michael F. Weber, Janis R. Gust
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Patent number: 6217828Abstract: The present invention provides an optical fluorescence based sensor for measuring the concentration of a gas (e.g., CO2 or ammonia) in a medium such as blood which has superior dry web sensor performance, enhanced sensor consistency for transparent sensor calibration, improved autoclave stability and rapid rehydration of the sensor. In a preferred embodiment, the sensors of the present invention comprise microcompartments of an aqueous phase having a pH sensitive indicator component and a nonionic amphipathic surfactant within a hydrophobic barrier phase comprising a plurality of dispersed hydrophobic particles.Type: GrantFiled: October 3, 1997Date of Patent: April 17, 2001Assignee: Terumo Cardiovascular Systems CorporationInventors: Kathryn R. Bretscher, James A. Baker, Kenneth B. Wood, Mai T. Nguyen, Monica A. Hamer, Christopher J. Rueb
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Patent number: 6194106Abstract: This invention discloses novel surface release layers on temporary image receptors particularly suited to the requirements of liquid electrographic (both electrophotographic and electrostatic) printing on a variety of receptors. The inventive temporary image receptors are comprised of a surface release layer on a photoreceptive or dielectric substrate. The release layers are silicone copolymers which are chemically modified to improve imaging, drying or transfer performance when used in the simplified color electrophotography (SCE) or electrostatic printing processes.Type: GrantFiled: May 23, 2000Date of Patent: February 27, 2001Assignee: Minnesota Mining and Manufacturing CompanyInventors: Kathryn R. Bretscher, Terri L. Butler, Mark C. Berens, James A. Baker, Gay L. Herman, Larry D. Boardman, Gaye K. Lehman
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Patent number: 6106989Abstract: This invention discloses novel surface release layers on temporary image receptors particularly suited to the requirements of liquid electrographic (both electrophotographic and electrostatic) printing on a variety of receptors. The inventive temporary image receptors are comprised of a surface release layer on a photoreceptive or dielectric substrate. The release layers are silicone copolymers which are chemically modified to improve imaging, drying or transfer performance when used in the simplified color electrophotography (SCE) or electrostatic printing processes.Type: GrantFiled: November 30, 1999Date of Patent: August 22, 2000Assignee: 3M Innovative Properties CompanyInventors: Kathryn R. Bretscher, Terri L. Butler, Mark C. Berens, James A. Baker, Gay L. Herman, Larry D. Boardman, Gaye K. Lehman
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Patent number: 6020098Abstract: This invention discloses novel surface release layers on temporary image receptors particularly suited to the requirements of liquid electrographic (both electrophotographic and electrostatic) printing on a variety of receptors. The inventive temporary image receptors are comprised of a surface release layer on a photoreceptive or dielectric substrate. The release layers are silicone copolymers which are chemically modified to improve imaging, drying or transfer performance when used in the simplified color electrophotography (SCE) or electrostatic printing processes.Type: GrantFiled: April 4, 1997Date of Patent: February 1, 2000Assignee: Minnesota Mining and Manufacturing CompanyInventors: Kathryn R. Bretscher, Terri L. Butler, Mark C. Berens, James A. Baker, Gay L. Herman, Larry D. Boardman, Gaye K. Lehman
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Patent number: 5965243Abstract: The invention is textured surface release layers for dielectric substrates used in liquid electrostatic imaging processes. The invention also includes means of providing textured release surfaces for dielectric substrates, and a method of liquid electrostatic imaging using textured dielectric substrates.Type: GrantFiled: April 4, 1997Date of Patent: October 12, 1999Assignee: 3M Innovative Properties CompanyInventors: Terri L. Butler, Kathryn R. Bretscher, Mark C. Berens, James A. Baker, Gaye K. Lehman
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Patent number: 5928726Abstract: A method of modulating coating patterns is disclosed. The method uses the steps of dispensing a composite comprising a carrier fluid layer and a transferring the composite to the substrate, wherein interfacial interaction among the carrier fluid layer, the functional fluid layer, and the substrate generates a patterned coating of the functional layer on the substrate. The coating patterns provide controlled release surfaces for tapes, image receptors, and the like.Type: GrantFiled: April 3, 1997Date of Patent: July 27, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Terri L. Butler, Kathryn R. Bretscher, Mark C. Berens, James A. Baker, Gaye K. Lehman
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Patent number: 5733698Abstract: The invention is photoconductor construction comprising a release layer which controls the carrier liquid on the surface of the photoreceptor and minimizes beading of toner carrier liquid. According to one embodiment this invention is a photoconductor construction comprising a photoconductor layer applied to an electroconductive substrate, an interlayer applied to the photoconductor layer, and a release layer over the interlayer. The release layer is a swellable polymer. According to another embodiment this invention is a photoconductor construction comprising a polymeric release layer that has a surface with an average roughness, Ra, of at least 10 nm.Type: GrantFiled: September 30, 1996Date of Patent: March 31, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Gaye K. Lehman, Claire A. Jalbert, Edward J. Woo, Kathryn R. Bretscher, James A. Baker, Mark C. Berens