Abstract: This invention provides a continuous ceramic oxide fiber comprising Al, Y, and O. In another aspect, a method of making the same is taught. The continuous ceramic oxide fiber is useful, for example, as thermal insulation, as a filter component, and as a reinforcement for structural composites.
Type:
Grant
Filed:
April 8, 1993
Date of Patent:
September 20, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: This invention provides a coated abrasive belt having a backing comprising a hot-melt adhesive, and a method of making the same. The splice of the endless coated abrasive belt according to the present invention has substantially the same thickness, density, and flexibility as the remainder of the belt.
Type:
Grant
Filed:
June 16, 1993
Date of Patent:
August 30, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Jan Gorsuch, Mark R. Ennis, Robert M. Burgess
Abstract: This invention provides a composite article having discrete microstructures partially encapsulated within a layer. A method of making the same is also provided. The article of the present invention is useful for visible radiation absorbing devices, such as, for example, selective solar absorbers, flat plate solar collectors, solar absorption panels, and solar cells.
Type:
Grant
Filed:
June 24, 1991
Date of Patent:
August 9, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: This invention provides a shaped ceramic composite article comprising ceramic oxide fiber(s), a first coating comprising a carbonaceous matrix which includes boron nitride particles in contact therewith, and a second coating comprising silicon carbide. The inventive composite article is useful in applications requiring good heat resistance and mechanical properties, such as gas fired radiant burner tubes, gas burner nozzle liners, heat exchangers, thermowells, core busters or flame dispersers, and other gas fired furnace components.
Type:
Grant
Filed:
August 20, 1991
Date of Patent:
August 2, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: The present invention relates to an intumescent mounting mat useful for mounting monoliths within a casing or container. The mat is useful, for example, for mounting a catalytic converter element in a metallic casing to provide a catalytic converter.
Type:
Grant
Filed:
March 25, 1993
Date of Patent:
July 26, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A method of making a coated abrasive article having an electrically conductive backing is taught, wherein electrically conductive material is incorporated into a coated abrasive backing. The coated abrasive article made by this method has a reduced tendency to accumulate static electric charge in the abrasive article during abrading of a workpiece.
Type:
Grant
Filed:
August 11, 1992
Date of Patent:
July 12, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A method for texturing magnetic recording media substrates which have a thin-film metal or metal alloy coating plated onto a substrate using an abrasive composite bonded to a porous backing.
Type:
Grant
Filed:
August 31, 1992
Date of Patent:
May 3, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
James A. Lucker, Darlene N. Strecker, Kathleen A. Wagle
Abstract: An efficient, economical, compact diesel particulate filter element in the form of a spiral roll. The filtering element is useful as a filtering element in a diesel particulate filter.
Type:
Grant
Filed:
January 6, 1993
Date of Patent:
March 29, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A buffing pad adapted to be releasably engaged with a buffing apparatus having a hookface type attachment surface and a method of making the same are taught.
Type:
Grant
Filed:
July 8, 1992
Date of Patent:
March 8, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: The present invention relates to a catalytic converter including a nonwoven mat comprising shot-free, high strength, magnesium aluminosilicate glass fiber.
Type:
Grant
Filed:
January 7, 1993
Date of Patent:
March 1, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
John J. Rogers, John L. Erickson, Stephen M. Sanocki
Abstract: A vitreous bonded abrasive article such as a grinding wheel is provided comprising high density sol-gel alumina-based abrasive grains comprised of alpha alumina and a vitreous bond which binds together the abrasive grains. The grinding wheel of the invention exhibits enhanced G-ratio grinding performance over comparable wheels containing sol-gel alumina-based abrasive grain having a density less than 3.85 grams per cubic centimeter.
Type:
Grant
Filed:
April 8, 1993
Date of Patent:
February 1, 1994
Assignees:
Cincinnati Milacron Inc., Minnesota Mining and Manufacturing Company
Abstract: This invention relates to a method of depositing thin coatings of transition metal dichalcogenides on substrates having an electrically-conductive surface. The transition metal dichalcogenide coating is useful, for example, as a release layer in the casting of polymeric materials.
Type:
Grant
Filed:
April 16, 1993
Date of Patent:
January 18, 1994
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A coating composition for use with ceramic composites to reduce gas permeability of the composites as well as provide an adhesive force to the composites. The composite contains a base fabric of aluminoborosilicate fibers coated with first a carbonaceous layer, followed by a layer of silicon carbide, and a layer of a mixture of silicon carbide, aluminum phosphate, and aluminoborosilicate particles.
Type:
Grant
Filed:
April 12, 1991
Date of Patent:
November 9, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: An electrically regenerable diesel particulate trap or filter comprising an electrically resistive expanded metal sheet or sleeve which when energized heats the filter element to a temperature sufficient to allow the trapped soot particulates to burn.
Type:
Grant
Filed:
April 5, 1991
Date of Patent:
November 2, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Richard L. Bloom, William T. Fay, Joel H. Sabean, Mark P. Smith
Abstract: An efficient, economical, compact diesel particulate trap has a plurality of perforated hollow tubes, on each of which a heat-resistant yarn is helically cross-wound to provide a plurality of layers that function as a filtering element. The yarn, which preferably is a continuous-filament ceramic yarn, has a core from which filaments or fiber segments project outwardly and intermesh with fiber segments of laterally spaced cores to provide traps. The cores of yarn convolutions of at least one layer are laterally offset from the cores of convolutions of an adjacent layer to deflect into tortuous paths gases flowing generally radially through the filtering element.
Type:
Grant
Filed:
May 11, 1992
Date of Patent:
September 28, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Richard L. Bloom, Troy K. Ista, Mark P. Smith
Abstract: An efficient, economical, compact diesel particulate filter comprising a casing comprising a plurality of perforated, supported, rigid tubes wherein the perforated surface of each tube is covered by a filtering element comprising substantially helically cross-wound inorganic yarn, and wherein the yarn is cross-wound to provide four-sided openings.
Type:
Grant
Filed:
April 5, 1991
Date of Patent:
September 28, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: This invention provides coated and three-dimensional, low density abrasive articles which comprise color stabilized alkali metal hydroxide catalyzed phenolic resin.
Type:
Grant
Filed:
May 4, 1992
Date of Patent:
August 3, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: This invention provides coated and three-dimensional, low density abrasive articles comprising ammonium aluminum fluoride-based salts which serve as grinding aids.
Type:
Grant
Filed:
May 4, 1992
Date of Patent:
June 15, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: This invention provides an improved alpha alumina-based ceramic and a method to make the same. The improvement consists of the addition of a chromium-based nucleating agent. Particularly useful embodiments of the improved alpha alumina-based ceramic include abrasive particles and fibers.
Type:
Grant
Filed:
July 16, 1990
Date of Patent:
June 15, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: This invention provides a continuous ceramic oxide fiber comprising Al, Y, and O. In another aspect, a method of making the same is taught. The continuous ceramic oxide fiber is useful, for example, as thermal insulation, as a filter component, and as a reinforcement for structural composites.
Type:
Grant
Filed:
June 3, 1991
Date of Patent:
June 8, 1993
Assignee:
Minnesota Mining and Manufacturing Company