Patents by Inventor Alexander C. Tsuei
Alexander C. Tsuei 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: 9616258Abstract: A method of making a face mask is disclosed. The method includes providing an elastic nonwoven web continuous in a machine direction, the elastic nonwoven web having a central lane extending in the machine direction; bonding a filtering web to the central lane of the elastic nonwoven web to provide a layered web, the filtering web being continuous in the machine direction and having a cross-web width that is substantially the same as the cross-web width of the central lane; and stamping a face mask into the layered web. A face mask and a continuous layered web having a plurality of face masks disposed thereon are also disclosed.Type: GrantFiled: March 1, 2011Date of Patent: April 11, 2017Assignee: 3M Innovative Properties CompanyInventor: Alexander C. Tsuei
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Patent number: 9272838Abstract: A system for containing a stack of face masks and dispensing individual face masks from the stack. The system includes a container and a stack of folded face masks. The container has a bottom panel forming a cut-line that defining a flap that is transitionable to an open state to generate an opening in the bottom panel. The stack is disposed within the container, and each face mask includes an elastic sheet forming a central portion and opposing first and second lateral end portions. Each face mask is folded such that a section of the first lateral end portion extends from a first fold line along the central portion. In a dispensing mode, the first lateral end portion of a bottommost folded face mask naturally drops through the opening due to gravity.Type: GrantFiled: August 8, 2013Date of Patent: March 1, 2016Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventor: Alexander C. Tsuei
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Publication number: 20150191299Abstract: A system for containing a stack of face masks and dispensing individual face masks from the stack. The system includes a container and a stack of folded face masks. The container has a bottom panel forming a cut-line that defining a flap that is transitionable to an open state to generate an opening in the bottom panel. The stack is disposed within the container, and each face mask includes an elastic sheet forming a central portion and opposing first and second lateral end portions. Each face mask is folded such that a section of the first lateral end portion extends from a first fold line along the central portion. In a dispensing mode, the first lateral end portion of a bottommost folded face mask naturally drops through the opening due to gravity.Type: ApplicationFiled: August 8, 2013Publication date: July 9, 2015Inventor: Alexander C. Tsuei
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Publication number: 20150173436Abstract: A face mask comprising an elastic sheet and a filtering web. The elastic sheet defines inner and outer surfaces, and an elongated shape. The elongated shape forms a central portion. A cut-out is formed through a thickness of the elastic sheet at the central portion. The filtering web forms at least one pleat, and is bonded to the outer surface of the elastic sheet along a bondline. The bondline borders a chamber region at least partially established by the filtering web, with the cut-out being fluidly open to the chamber region. When worn, the inner surface is placed against the user's face, and a mouth and a portion of the nose of the user is inserted through the at least one cut-out. In some embodiments, the filtering web forms two vertical pleats that are located at opposite sides of a centerline of the face mask.Type: ApplicationFiled: February 25, 2013Publication date: June 25, 2015Inventor: Alexander C. Tsuei
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Patent number: 8967837Abstract: A solid state light having a shell forming an interior volume and with surface texture for redirecting light. A light section is coupled to the shell, and a light source board in the light section includes at least one solid state light source such as an LED. The shell, light section, and light source board have apertures for providing an air cooling channel through the light. The solid state light source transmits light into the interior volume, and the light exits from the shell and is redirected by the surface texture, providing for various light distribution curves of the light.Type: GrantFiled: August 1, 2013Date of Patent: March 3, 2015Assignee: 3M Innovative Properties CompanyInventors: Alexander C. Tsuei, James F. Poch, Paul E. Humpal, Hamid R. Mortazavi, Robert L. Brott, Raymond P. Johnston
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Publication number: 20150036333Abstract: A solid state light having a shell forming an interior volume and with surface texture for redirecting light. A light section is coupled to the shell, and a light source board in the light section includes at least one solid state light source such as an LED. The shell, light section, and light source board have apertures for providing an air cooling channel through the light. The solid state light source transmits light into the interior volume, and the light exits from the shell and is redirected by the surface texture, providing for various light distribution curves of the light.Type: ApplicationFiled: August 1, 2013Publication date: February 5, 2015Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: ALEXANDER C. TSUEI, JAMES F. POCH, PAUL E. HUMPAL, HAMID R. MORTAZAVI, ROBERT L. BROTT, RAYMOND P. JOHNSTON
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Publication number: 20140224261Abstract: A face mask and method of making it are disclosed. The face mask has a layered construction including an elongated elastic nonwoven sheet having a central portion and first and second lateral end portions on opposite sides of the central portion; a filtering web portion bonded to the central portion of the elastic nonwoven sheet; and a first flap bonded to the central portion of the elastic nonwoven sheet, wherein the first flap is smaller in area than the filtering web portion, and wherein the first flap is bonded along one of the top edge or the bottom edge of the central portion. A dispenser including a plurality of the face masks, a stack of a plurality of the face masks, and a continuous layered web having a plurality of face masks disposed thereon are also disclosed.Type: ApplicationFiled: September 7, 2012Publication date: August 14, 2014Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventor: Alexander C. Tsuei
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Publication number: 20120325843Abstract: A plurality of face masks that includes a stack of interfolded face masks comprising a first face mask and a second face mask is disclosed. The first and second face masks each include an elastic nonwoven sheet with an elongated shape and having a central portion and first and second lateral end portions each flanking the central portion on opposite sides. The second lateral end portion of the first face mask is interfolded with the first or second lateral end portion of the second face mask. A dispenser including a container enclosing the plurality of face masks is also disclosed.Type: ApplicationFiled: March 2, 2011Publication date: December 27, 2012Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventor: Alexander C. Tsuei
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Publication number: 20120318273Abstract: A method of making a face mask is disclosed. The method includes providing an elastic nonwoven web continuous in a machine direction, the elastic nonwoven web having a central lane extending in the machine direction; bonding a filtering web to the central lane of the elastic nonwoven web to provide a layered web, the filtering web being continuous in the machine direction and having a cross-web width that is substantially the same as the cross-web width of the central lane; and stamping a face mask into the layered web. A face mask and a continuous layered web having a plurality of face masks disposed thereon are also disclosed.Type: ApplicationFiled: March 1, 2011Publication date: December 20, 2012Inventor: Alexander C. Tsuei
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Patent number: 7204365Abstract: An assembly and method for cleaning a conveyor belt system is disclosed. The cleaning assembly is for removing liquids and solids from an endless conveyor belt, the assembly includes a plurality of laterally extending liquid absorbent material sheets disposed adjacent the belt, with the sheets collectively defining a contact face that is engageable with the belt for wiping liquids from the belt.Type: GrantFiled: September 6, 2006Date of Patent: April 17, 2007Assignee: 3M Innovative Properties CompanyInventors: Lance E. Behymer, Smarajit Mitra, Jerald W. Hall, Jr., Alexander C. Tsuei
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Patent number: 7114610Abstract: An assembly and method for cleaning a conveyor belt system is disclosed. The cleaning assembly is for removing liquids and solids from an endless conveyor belt, the assembly includes a plurality of laterally extending liquid absorbent material sheets disposed adjacent the belt, with the sheets collectively defining a contact face that is engageable with the belt for wiping liquids from the belt.Type: GrantFiled: May 20, 2004Date of Patent: October 3, 2006Assignee: 3M Innovative Properties CompanyInventors: Lance E. Behymer, Smarajit Mitra, Jerald W. Hall, Jr., Alexander C. Tsuei
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Patent number: 7055675Abstract: An assembly for cleaning a conveyor belt system is disclosed. The cleaning assembly is for a conveyor belt system with the type having first and second endless belts which each traverse a separate belt travel path and together define a generally upright article transport path between opposed top faces of the belts. The cleaning assembly includes a belt wiping blade assembly for moving liquids and debris from a belt, an absorbent material downstream from the blade assembly for wiping excess liquid from the belt, and belt edge seals disposed between the opposed top faces of the belts along the article transport path.Type: GrantFiled: December 4, 2002Date of Patent: June 6, 2006Assignee: 3M Innovative Properties CompanyInventors: Lance E. Behymer, Smarajit Mitra, Jerald W. Hall, Jr., Alexander C. Tsuei
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Publication number: 20040108187Abstract: An assembly for cleaning a conveyor belt system is disclosed. The cleaning assembly is for a conveyor belt system with the type having first and second endless belts which each traverse a separate belt travel path and together define a generally upright article transport path between opposed top faces of the belts. The cleaning assembly includes a belt wiping blade assembly for moving liquids and debris from a belt, an absorbent material downstream from the blade assembly for wiping excess liquid from the belt, and belt edge seals disposed between the opposed top faces of the belts along the article transport path.Type: ApplicationFiled: December 4, 2002Publication date: June 10, 2004Applicant: 3M Innovative Properties CompanyInventors: Lance E. Behymer, Smarajit Mitra, Jerald W. Hall, Alexander C. Tsuei
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Publication number: 20020062912Abstract: A method of communicating information is provided, wherein the method includes providing a base mat adapted for receiving at least one replaceable sheet, where the base mat has first and second opposing surfaces. The method further includes providing a first replaceable sheet having a base surface and an opposing face surface, wherein the face surface displays indicia. The first replaceable sheet is removably attached to at least a portion of the first surface of the base mat so that the base surface of the sheet faces the first surface of the base mat, where it is displayed for a period of time. When it is desired to change the indicia, the first replaceable sheet is removed, and a second replaceable sheet is provided having a base surface and an opposing face surface, wherein the face surface displays indicia. The second replaceable sheet is removably attached to at least a portion of the first surface of the base mat so that the base surface of the sheet faces the first surface of the base mat.Type: ApplicationFiled: November 30, 2000Publication date: May 30, 2002Applicant: 3M Innovative Properties CompanyInventors: Smarajit Mitra, Alexander C. Tsuei, James W. Sinclair
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Patent number: 5783303Abstract: A low VOC curable water-based coating composition is provided. The composition includes a urethane/acrylic copolymer having a Tg of greater than about 50.degree. C., a polyoxyethylene aryl ether plasticizer, an alkaline-stable crosslinker, and water, wherein the curable water-based coating composition includes less than about 5 wt-% volatile organic compounds, based on the total weight of the composition.Type: GrantFiled: January 31, 1997Date of Patent: July 21, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventor: Alexander C. Tsuei
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Patent number: 5643669Abstract: A low VOC curable water-based coating composition is provided. The composition includes a urethane/acrylic copolymer having a Tg of greater than about 50.degree. C., a polyoxyethylene aryl ether plasticizer, an alkaline-stable crosslinker, and water, wherein the curable water-based coating composition includes less than about 5 wt-% volatile organic compounds, based on the total weight of the composition.Type: GrantFiled: February 8, 1996Date of Patent: July 1, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventor: Alexander C. Tsuei
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Patent number: 5589194Abstract: Microcapsules are prepared by dispersing or dissolving an active component or components in a solid matrix-forming material that has been thermally softened to form an encapsulation composition. The encapsulation composition is injected as an intact stream into a quenching liquid to provide solid microcapsules.Type: GrantFiled: September 20, 1993Date of Patent: December 31, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventors: Alexander C. Tsuei, Lorenz Kogl, III, Daniel B. Pendergrass, Jr.
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Patent number: 5433953Abstract: A method for microencapsulating quaternary ammonium salts by interfacial polymerization. The polar component comprises a quaternary ammonium salt, glycerine, triethyleneglycol diamine, a C 4-10 straight or branched aliphatic compound having two primary amine functionalities, and a C 4-10 straight or branched aliphatic compound having at least three primary amine functionalities. The glycerine-immiscible oil component comprises mineral oil, an aliphatic polyisocyanate and a surfactant. The mole equivalent ratios of primary amine to isocyanate in this reaction is about 0.01-3:1. Microcapsules made by this method are unique and provide surprising benefits in durability, elasticity and barrier properties in resistance to leaching of the microcapsule fill material.Type: GrantFiled: January 10, 1994Date of Patent: July 18, 1995Assignee: Minnesota Mining and ManufacturingInventors: Alexander C. Tsuei, Smarajit Mitra