Patents Represented by Attorney William G. Ewert
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Patent number: 6863211Abstract: Normally liquid, omega-hydrofluoroalkyl ether compounds (and selected mixtures thereof) have a saturated perfluoroaliphatic chain of carbon atoms interrupted by one or more ether oxygen atoms. The compounds can be prepared, e.g., by decarboxylation of the corresponding fluoroalkyl ether carboxylic acids and are useful, e.g., in cleaning and drying applications.Type: GrantFiled: September 12, 2002Date of Patent: March 8, 2005Assignee: 3M Innovative Properties CompanyInventors: George G. I. Moore, Richard M. Flynn, Miguel A. Guerra, John G. Owens
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Patent number: 5976669Abstract: A retroreflective article (10) has retroreflective elements (12) partially embedded in a binder layer (14) that contains a solid polyurethane. The polyurethane includes soft segments, hard segments, silicon moieties, and urethane moieties. The specific chemical identities and relative amounts of the segments and moieties are sufficient to impart desired high elongation and low modulus to the polymer. The inventive retroreflective article is capable of demonstrating extraordinary laundering durability under industrial wash conditions and tumble and tunnel drying.Type: GrantFiled: December 20, 1996Date of Patent: November 2, 1999Assignee: 3M Innovative Properties CompanyInventor: Robert J. Fleming
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Patent number: 5696199Abstract: A fluid permeable composite structure having active particulate bonded together using a pressure-sensitive adhesive (PSA) polymer microparticulate. Use of the PSA polymer microparticulate to bond the active particulate together produces a bonded structure that, unlike previously-developed active bonded structures, is flexible and therefore can be conformed into a variety of shapes. The shaped structures may be used as gaseous filters in a wide variety of respirators.Type: GrantFiled: July 23, 1996Date of Patent: December 9, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Raymond Senkus, Chung I. Young, Leonard W. Barrett, Ying-Yuh Lu
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Patent number: 4882390Abstract: A fluoroelastomer composition curable in reactive admixture with an acid acceptor that includes an elastomeric gum consisting essentially of vinylidene fluoride, tetrafluoroethylene, and copolymerizable hydrocarbon olefin and a combination of(A) polyhydroxy compound, and(B) organo-onium compound, and process of curing the elastomeric copolymer with an admixture of (A) and (B) and an acid acceptor, and the resulting shaped or formed, cured articles are described.Type: GrantFiled: February 15, 1989Date of Patent: November 21, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventor: Robert E. Kolb
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Patent number: 4866118Abstract: The amine resistance of peroxide-cured fluorocarbon elastomers is improved by dispersing certain normally solid, inorganic chloride or bromide salts in the elastomer gum formulation.Type: GrantFiled: October 27, 1988Date of Patent: September 12, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventor: Mark S. Schaberg
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Patent number: 4863983Abstract: An extrudable composition comprising hydrocarbon polymer, organophosphite or organophosphate compound and fluorocarbon polymer. The organophosphite or organophosphate and the fluorocarbon polymer are present in the composition in such relative proportions and concentrations as to reduce the occurrence of melt defects during the extrusion of said thermoplastic hydrocarbon polymer.Type: GrantFiled: April 15, 1988Date of Patent: September 5, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventors: Bryce V. Johnson, Joyce M. Kunde
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Patent number: 4855360Abstract: An extrudable composition comprising thermoplastic hydrocarbon polymer, poly(oxyalkylene) polymer and fluorocarbon polymer. The poly(oxyalkylene) polymer and the fluorocarbon polymer are present in the composition in such relative proportions and concentrations as to reduce the occurrence of melt defects during the extrusion of said hydrocarbon polymer composition.Type: GrantFiled: April 15, 1988Date of Patent: August 8, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventors: Denis Duchesne, Bryce V. Johnson
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Patent number: 4803239Abstract: The amine resistance of peroxide-cured fluorocarbon elastomers is improved by dispersing certain normally solid, inorganic chloride or bromide salts in the elastomer gum formulation.Type: GrantFiled: September 14, 1987Date of Patent: February 7, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventor: Mark S. Schaberg
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Patent number: 4795590Abstract: Air is mechanically entrained in an aqueous solution of surfactant and poly(oxyalkylene) polyisocyanate polymer, the poly(oxyalkylene) portion of which contains sufficient oxyethylene units to render the polymer water-soluble and hydrophilic, to form a fluid, water-based, air foam which is sprayed or otherwise applied to exposed surface of a substrate, such as a body of hazardous material, the applied foam gelling or increasing in viscosity, due to reaction of the polyisocyanate polymer with water to form a poly(oxyalkylene) polyurea polymer, and forming a persistent gelled air foam or viscous air foam in the form of a coating on the exposed surface, thus sealing or otherwise protecting or controlling the substrate.Type: GrantFiled: April 24, 1986Date of Patent: January 3, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventors: Dale W. Kent, Thomas W. Berger
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Patent number: 4795764Abstract: Air is mechanically entrained in an aqueous solution of surfactant, polyamine reactant, and low moisture sensitive poly(oxyalkylene) poly(aliphatic isocyanate) prepolymer the poly(oxyalkylene) portion of which contains sufficient oxyethylene units to render the prepolymer water-soluble and hydrophilic, to form a fluid, water-based, air foam which is sprayed or otherwise applied to exposed surface of a substrate, such as a body of hazardous material, the applied foam gelling or increasing in viscosity, due to reaction of the polyisocyanate prepolymer with the polyamine in the presence of the water to form a poly(oxyalkylene) polyurea polymer containing polyurylene-containing segments formed from the reaction, and forming a persistent gelled air foam or viscous air foam in the form of a coating on the exposed surface, thus sealing or otherwise protecting or controlling the substrate.Type: GrantFiled: June 1, 1987Date of Patent: January 3, 1989Assignee: Minnesota Mining & Manufacturing CompanyInventors: Roger R. Alm, Irvin F. Dunsmore, Richard M. Stern
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Patent number: 4668558Abstract: An article comprising a shaped, plastic layer or body comprising crosslinked polymer with hard and soft segments or moieties and having a microstructure-bearing surface is prepared by a process comprising filling a mold master, bearing or encoded with the microstructure to be replicated, with a fluid, castable, one-part, preferably solvent-free, radiation addition-polymerizable, crosslinkable, synthetic, organic oligomeric composition (or precursors thereof) having "hard" segments and "soft" polysiloxane segments, exposing the resulting case composition to radiation, preferably actinic radiation such as ultraviolet radiation, and thereby forming said article, e.g., a retroreflective cube-corner sheeting, Fresnel lens or video disc.Type: GrantFiled: January 6, 1986Date of Patent: May 26, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Elaine C. Barber
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Patent number: 4647413Abstract: Perfluoropolyether oligomers or block polymers, having a backbone with one or a plurality of perfluoropolyether segments each consisting essentially of (1) at least one perfluoroisopropyleneoxy unit, (2) a bis(perfluoromethyleneoxy-terminated) unit, and (3) a perfluoroethylidene unit terminating each segment, the backbone of the perfluoropolyether being terminated with COF and/or a functional or nonfunctional derivative thereof, said perfluoropolyethers being made by reacting a perfluoroaliphatic diacid fluoride with hexafluoropropylene epoxide to produce an acid fluoride-terminated perfluoropolyether adduct or oligomer which then can be photopolymerized to yield an acid fluoride-terminated perfluoropolyether block polymer. These oligomers and block polymers are useful as high temperature lubricants, hydraulic fluids, gaskets, adhesives and coatings as well as co-reactants wtih urethane in forming propellant binders.Type: GrantFiled: January 20, 1984Date of Patent: March 3, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Patricia M. Savu
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Patent number: 4614667Abstract: Composite low surface energy liner provided by an inner layer of insoluble polymer made from a polymerizable, film-forming monomer and an outer layer of insoluble polymer made from a polymerizable perfluoropolyether monomer copolymerizable with said film-forming monomer, which layers are in-situ polymerized. The compposite low surface energy liner is especially useful as a low-adhesion backsize coating in a pressure-sensitive adhesive tape.Type: GrantFiled: November 12, 1985Date of Patent: September 30, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventors: James M. Larson, Allen L. Noreen
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Patent number: 4595720Abstract: The processing of elastomer gums, which can be natural rubber or synthetic elastomers such as copolymers of vinylidene fluoride and hexafluoropropylene, are improved by incorporating in said gum, along with conventional chemical and compounding ingredients, cyanuric acid or isocyanurate or cyanurate derivatives thereof to improve the processing of such gums, for example, to improve the extrudability thereof or the release of molded articles thereof from the mold.Type: GrantFiled: June 26, 1985Date of Patent: June 17, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventors: David A. Stivers, Richard A. Guenthner
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Patent number: 4582885Abstract: An article comprising a shaped, plastic layer or body comprising crosslinked polymer with hard and soft segments or moieties and having a microstructure-bearing surface is prepared by a process comprising filling a mold master, bearing or encoded with the microstructure to be replicated, with a fluid, castable, one-part, preferably solvent-free, radiation addition-polymerizable, crosslinkable, synthetic, organic oligomeric composition (or precursors thereof) having "hard" segments and "soft" polysiloxane segments, exposing the resulting case composition to radiation, preferably actinic radiation such as ultraviolet radiation, and thereby forming said article, e.g., a retroreflective cube-corner sheeting, Fresnel lens or video disc.Type: GrantFiled: December 18, 1979Date of Patent: April 15, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventor: Elaine C. Barber
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Patent number: 4576850Abstract: An article comprising a shaped, plastic layer or body comprising crosslinked polymer with hard and soft segments or moieties and having a microstructure-bearing surface is prepared by a process comprising filling a mold master, bearing or encoded with the microstructure to be replicated, with a fluid, castable, one-part, preferably solvent-free, radiation addition-polymerizable, crosslinkable, synthetic, organic oligomeric composition (or precursors thereof) having "hard" segments and "soft" segments, exposing the resulting cast composition to radiation, preferably actinic radiation such as ultraviolet radiation, and thereby forming said article, e.g., a retroreflective cube-corner sheeting, Fresnel lens or video disc.Type: GrantFiled: July 20, 1978Date of Patent: March 18, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventor: John A. Martens
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Patent number: 4567073Abstract: Composite low surface energy liner provided by an inner layer of insoluble polymer made from a polymerizable, film-forming monomer and an outer layer of insoluble polymer made from a polymerizable perfluoropolyether monomer copolymerizable with said film-forming monomer, which layers are in-situ polymerized. The composite low surface energy liner is especially useful as a low-adhesion backsize coating in a pressure-sensitive adhesive tape.Type: GrantFiled: May 21, 1984Date of Patent: January 28, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventors: James M. Larson, Allen L. Noreen
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Patent number: 4564662Abstract: Peroxide-curable fluorocarbon elastomers having interpolymerized units derived from a cure site monomer containing bromine or iodine. The fluorocarbon elastomer gums are prepared by copolymerizing with the principal monomers normally used in preparing fluorocarbon elastomers, e.g. vinylidene fluoride, hexafluoropropene, and (optionally) tetrafluoroethylene, a small amount of a novel cure site monomer which is a vinyl ether in which at least one of the two vinylic (or double-bonded) carbon atoms thereof is bonded to at least one bromine or iodine atom, e.g. CF.sub.3 CH.sub.2 OCF.dbd.CFBr. The cured fluorocarbon elastomers of this invention have useful properties normally associated with fluorocarbon elastomers, such as acid resistance, thermal stability, and high tensile strength. These properties of shaped articles made from these fluorocarbon elastomers are not adversely affected upon exposure to high temperatures for extended periods.Type: GrantFiled: February 23, 1984Date of Patent: January 14, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventor: Loren D. Albin
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Patent number: 4472480Abstract: Low surface energy liner provided by segments of a perfluoropolyether monomer which has been in-situ polymerized into a cohesive network which is adhered to a substrate. The low surface energy liner is especially useful as a low-adhesion backsize coating for a pressure-sensitive adhesive tape.Type: GrantFiled: July 2, 1982Date of Patent: September 18, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventor: Paul E. Olson
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Patent number: 4468527Abstract: A fluoroaliphatic radical- and aliphatic chlorine-containing alcohol containing more than 25 weight percent carbon-bonded fluorine in the form of fluoroaliphatic radicals and at least one aliphatic chlorine, an ester of said alcohol and a carboxycylic acid being useful in the treatment of carpet.Type: GrantFiled: March 15, 1982Date of Patent: August 28, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventor: Kalyanji U. Patel