Patents Represented by Attorney, Agent or Law Firm Lorraine R. Sherman
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Patent number: 5912377Abstract: A composition of matter comprises an aromatic cyanate ester silane comprising at least one cyanate ester group and at least one hydrolyzable silyl group. In the presence of a cyanate ester resin the aromatic cyanate ester silane acts as a coupling agent to improve the adhesion of the cyanate ester to a substrate. The curable compositions are useful as reinforced composites, and as adhesive and coating compositions.Type: GrantFiled: June 5, 1996Date of Patent: June 15, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Joyce B. Hall, Kim M. Vogel, Fred B. McCormick, Hiroyaki Yamaguchi
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Patent number: 5863664Abstract: A composition of matter includes a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.Type: GrantFiled: July 17, 1996Date of Patent: January 26, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
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Patent number: 5834330Abstract: A II-VI semiconductor device is fabricated using a selective etchant in the form of aqueous solution of HX where X is Cl or Br. The II-VI semiconductor device is composed of a number of layers. Selective etching can be enabled by introducing Mg into one of the semiconductor layers. The resultant device may include a semiconductor layer containing Mg.Type: GrantFiled: October 7, 1996Date of Patent: November 10, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Michael A. Haase, Paul F. Baude, Thomas J. Miller
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Patent number: 5818859Abstract: A II-VI compound semiconductor laser diode includes a plurality of II-VI semiconductor layers forming a pn junction supported by a single crystal GaAs semiconductor substrate. The layers formed in the pn junction include a first cladding layer of a first conductivity type, a second cladding layer of a second conductivity type, and at least a first guiding layer between the first and second cladding layers. A quantum well active layer is positioned within the pn junction. Electrical energy is coupled to the laser diode by first and second electrodes. Various layers in the laser diode are formed using Be.Type: GrantFiled: October 7, 1996Date of Patent: October 6, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Thomas J. Miller, Michael A. Haase, Paul F. Baude, Michael D. Pashley
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Patent number: 5767534Abstract: A II-VI semiconductor device includes a stack of semiconductor layers. An ohmic contact is provided that electrically couples to the stack. The ohmic contact has an oxidation rate when exposed to an oxidizing substance. A passivation capping layer overlies the ohmic contact and has an oxidation rate that is less than the oxidation rate of the ohmic contact.Type: GrantFiled: February 24, 1997Date of Patent: June 16, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Fen-Ren Chien, Michael A. Haase, Thomas J. Miller
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Patent number: 5760152Abstract: Insoluble supports are prepared which possess high surface areas and efficiently dispersed isocyanate groups. These reactive supports are useful for covalently binding proteins which preferably are enzymes and provide catalysts for conducting organic reactions.Type: GrantFiled: May 30, 1995Date of Patent: June 2, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Steven M. Heilmann, Gary J. Drtina, Louis C. Haddad, Frederick W. Hyde, Dean M. Moren, Robert A. Pranis
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Patent number: 5756633Abstract: Water-dispersible sulfopoly(ester-urethane) compositions which comprise, in their backbone, at least one arylene or alkylene sulfonic acid group or a salt thereof, the polymer being terminated by at least one hydrolyzable silyl group. The compositions of the invention preferably have a sulfonate equivalent weight of about 500 to about 12,000 g/equivalent and a number average molecular weight less than 50,000. Compositions of the invention have utility as durable treatments such as low surface energy coatings that exhibit release towards adhesive materials, grease, and oils.Type: GrantFiled: March 1, 1996Date of Patent: May 26, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventor: Wayne K. Larson
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Patent number: 5750641Abstract: An angularity enhancement layer in a liquid crystal display, which display comprises a liquid crystal cell, wherein the angularity enhancement layer includes a negative birefringent polyimide layer comprising a plurality of structural units having pendant fluorene groups, said angularity enhancement layer being disposed on at least one surface of said liquid crystal cell. A liquid crystal display can comprise an angularity enhancement construction of the invention which comprises a polyimide layer.Type: GrantFiled: May 23, 1996Date of Patent: May 12, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Stephen A. Ezzell, Hassan Sahouani, Ernest L. Thurber
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Patent number: 5747626Abstract: A pavement marking composition comprises a sulfopoly(ester-urethane) polymer which comprises in its backbone at least one non-terminal arylene or alkylene group comprising a pendant sulfonic acid group or salt thereof, the polymer of said pavement marking composition being terminated by at least one hydrolyzable silyl group. A method of making the composition is disclosed. The pavement marking composition can further comprise at least one of pigments, optical elements, fillers, or other adjuvants. Particularly desirable adjuvants include optical elements, particularly retroreflective elements, skid-resistant particles, and pigments.Type: GrantFiled: March 1, 1996Date of Patent: May 5, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Larry R. Krepski, Steven M. Heilmann, Daniel E. Mickus, Wayne K. Larson, Mark T. Gibson, Mark D. Purgett, Christopher J. Rueb, Howell K. Smith, II
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Patent number: 5744574Abstract: Isomaleimides and polyisomaleimides can be prepared by a method comprising the steps in sequence: admixing a maleamic acid or polymaleamic acid with an acid halide, reacting the admixture with a tertiary amine at a temperature sufficiently low to suppress the formation of a maleimide, and isolating the resulting isomaleimide or polyisomaleimide. Polymerization of a polyisomaleimide with a polynucleophilic monomer (polythiol, polyol, polyamine) produces novel polymers.Type: GrantFiled: December 5, 1995Date of Patent: April 28, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Stephen A. Ezzell, Richard G. Hansen, Gregory J. Anderson
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Patent number: 5744557Abstract: A composition of matter including a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.Type: GrantFiled: June 16, 1993Date of Patent: April 28, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
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Patent number: 5738790Abstract: A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of molecular sieves to matrix being in the range of 40:1 to 1:40.Type: GrantFiled: March 5, 1997Date of Patent: April 14, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Donald F. Hagen, Paul E. Hansen, Craig G. Markell
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Patent number: 5726524Abstract: An electric field emission device includes an electrode that includes a layer having a dense array of discrete, solid microstructures disposed on at least a portion of one or more surfaces of a substrate, the microstructures having an areal number density of greater than 10.sup.7 /cm.sup.2, the microstructures being individually conformally overcoated with one or more layers of an electron emitting material, the overcoated electron emitting material being disposed on at least a portion of the microstructures and have a surface morphology which is nanoscopically rough. A method for preparing the electrode used in the invention is discussed.Type: GrantFiled: May 31, 1996Date of Patent: March 10, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventor: Mark K. Debe
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Patent number: 5709948Abstract: A curable composition comprises 0.1 to 50 weight percent of a curable epoxy resin, the weight percent being based on the total resin composition, an effective mount of a curative for the curable epoxy resin, 50 to 99.9 weight percent of at least one of a fully prepolymerized hydrocarbon polyolefin resin and a fully prepolymerized functionalized polyolefin resin, the weight percent being based on the total resin composition, wherein said hydrocarbon polyolefin is present in the range of 25 to 99.9 weight percent of the total resin composition and said functionalized polyolefin is present in the range of 0 to 49.9 weight percent of the total resin composition, said composition being free of epoxidized natural and/or synthetic rubber.Type: GrantFiled: December 21, 1995Date of Patent: January 20, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Mario A. Perez, David A. Ylitalo, Thomas M. Clausen, Robert J. DeVoe, Kevin E. Kinzer, Michael D. Swan
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Patent number: 5702610Abstract: A sheet article for solid phase extraction or solid phase reaction comprises at least one sorptive polymer pulp, and optionally at least one of sorptive and reactive particulate. The article can be used in a method of separating an analyte from a fluid comprising the step of passing a fluid comprising an analyte through a sheet article comprising poly(p- or m-phenylenephthalamide) pulp, the pulp optionally having incorporated therein solid phase particulates, the sheet article being capable of isolating the analyte from the fluid.Type: GrantFiled: January 9, 1996Date of Patent: December 30, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Donald F. Hagen, Simon S. Fung, Paul E. Hansen
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Patent number: 5700375Abstract: An efficient method removes oxidants from fluids (gases and liquids, particularly air) by means of solid phase extraction or reaction. The solid phase extraction or reaction medium comprises a porous, preferably fibrous, polymeric, membrane or web in which are incorporated oxidant scavenger particulates. Typical oxidants removed in the method include ozone, oxides of nitrogen, halogen, and peroxides. The method of the invention protects organic analytes in analytical applications and removes oxidants in remediation applications by use of oxidant scavenger particles in porous membranes.Type: GrantFiled: April 29, 1996Date of Patent: December 23, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Donald F. Hagen, Kenneth M. Hart, Glenn D. Johnson
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Patent number: 5688370Abstract: A sheet article for solid phase extraction or solid phase reaction has at least one sorptive polymer pulp at least one of sorptive and reactive particulate. The article can be used in a method of separating an analyte from a fluid by passing a fluid containing an analyte through a sheet article containing poly(p- or m-phenylenephthalamide) pulp and solid phase particles.Type: GrantFiled: April 25, 1995Date of Patent: November 18, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Donald F. Hagen, Simon S. Fung, Paul E. Hansen
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Patent number: 5679754Abstract: A water dispersible polymeric composition comprises at least one sulfo group containing segment, which group comprises at least one urethane or urea connecting group, said composition also comprising at least one hydrophobic segment, which segment comprises at least one urethane or urea connecting group. The composition when dried can provide a coating on a substrate or an article having low surface energy and preferably ink receptive properties. The article can provide release capabilities towards adhesives, particularly pressure sensitive adhesives.Type: GrantFiled: June 6, 1996Date of Patent: October 21, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Wayne K. Larson, Richard E. Bennett, Nicole L. Franchina
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Patent number: 5679779Abstract: Insoluble supports are prepared which possess high surface areas and efficiently dispersed isocyanate groups. These reactive supports are useful for covalently binding proteins which preferably are enzymes and provide catalysts for conducting organic reactions.Type: GrantFiled: May 23, 1995Date of Patent: October 21, 1997Assignee: Minnesota Mining and ManufacturingInventors: Steven M. Heilmann, Gary J. Drtina, Louis C. Haddad, Frederick W. Hyde, Dean M. Moren, Robert A. Pranis
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Patent number: 5672637Abstract: The present invention provides an energy polymerizable composition comprising at least one epoxy monomer or at least one vinyl ether monomer and an initiation system therefor, the initiation system comprising at least one organometallic complex salt and at least one stabilizing additive. The cured composition provides useful articles or coated articles.Type: GrantFiled: November 3, 1995Date of Patent: September 30, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Wayne S. Mahoney, Michael C. Palazzotto