Patents Represented by Attorney, Agent or Law Firm Dale A. Bjorkman
  • Patent number: 5411802
    Abstract: A process for making solid colored particles by preparing a reaction solution in water comprising formaldehyde, urea, a cyclic polyamine functional triazine compound, and acid. A dye can be incorporated into the reaction solution if a color other than white is desired. Particles are formed having an average particle size between 1 and 70 microns without the need to resort to crushing to break up agglomerates. Particles made by this process provide excellent color and are easily washable from a substrate when incorporated into a washable formulation.Additionally, it has been found that the incorporation of colored microcapsules of average size of 1-70 microns where the color is located primarily on or in the shell of the microcapsule also provides excellent washable compositions when incorporated into a washable formulation.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: May 2, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kanta Kumar, Robert A. Davis, Sheila M. Nichols, Howard J. Buttery
  • Patent number: 5401169
    Abstract: A cartridge for delivery of multiple-part dental materials comprisinga) a cartridge body made from an injection moldable material comprising polyalkylene oxide homopolymer or polyalkylene oxide copolymer wherein said homopolymer or copolymer comprises a repeat unit that is ##STR1## wherein R is H or an aliphatic moiety. The cartridge body has a Burst Pressure greater than that of an otherwise identical cartridge made entirely of polypropylene, and a flexural modulus greater than 1.3.times.10.sup.3 MPa at 50% relative humidity and 23.degree. C., andb) a multiple-part dental material. The cartridge is specially adapted to be mounted in a hand-held ejector-type gun.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: March 28, 1995
    Assignee: Minnesota Mining and Manufacturing
    Inventors: Larry D. Fleisher, Thomas W. Martin
  • Patent number: 5401505
    Abstract: Microcapsules containing a shell wall and a liquid fill are produced by an interfacial polymerization reaction between a polyfunctional aziridine and at least one other polyfunctional organic coreactant selected from the group of polyacid halides, polycarboxylic acids, polyamines, polyhydroxyl-containing compounds, polythiol-containing compounds, polyisocyanates, polyisothiocyanates, and mixtures thereof.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: March 28, 1995
    Assignee: Minnesota Mining and Manufacturing
    Inventors: Bradley L. Duell, Daniel B. Pendergrass, Jr.
  • Patent number: 5400460
    Abstract: An adhesive article for use in a microwave oven is provided having a hot-melt or heat-curable adhesive substrate, and a susceptor layer of electrically conductive or semi-conductive microwave absorbing material that is disposed on at least a portion of the substrate. The article becomes less absorbent of microwave radiation upon the melting or deformation of the substrate. This article is suitable for adhering one adherend to another by exposing said article containing a hot-melt adhesive substrate to microwave energy.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: March 28, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: David C. Roeker, David F. Slama, William F. Sheffield
  • Patent number: 5395047
    Abstract: A device for delivery of volatile materials comprising a volatile material delivery layer, a support layer and a repositionable adhesive layer. Devices so constructed may be applied to any desired substrate without fear of harming the surface of the substrate.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: March 7, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Daniel B. Pendergrass, Jr.
  • Patent number: 5391374
    Abstract: A fragrance-delivery composition is provided having cake-forming components and microcapsules containing fragrance oil. The composition is a coherent cake, and has a VOC content less than 250 grams of per liter less water, fragrance oil and exempt solvents.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: February 21, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jack W. Charbonneau, Daniel B. Pendergrass, Jr.
  • Patent number: 5340649
    Abstract: An adhesive article for use in a microwave oven is provided having a hot-melt or heat-curable adhesive substrate, and a susceptor layer of electrically conductive or semi-conductive microwave absorbing material that is disposed on at least a portion of the substrate. The article becomes less absorbent of microwave radiation upon the melting or deformation of the substrate. This article is suitable for adhering one adherend to another by exposing said article containing a hot-melt adhesive substrate to microwave energy.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: August 23, 1994
    Assignee: Minnesota Mining and Manufacturing
    Inventors: David C. Roeker, David F. Slama, William F. Sheffield
  • Patent number: 5325721
    Abstract: Disclosed is a device for selectively indicating strain comprising a layer of polymeric binder and, distributed in or adjacent to the binder layer, microcapsules containing an indicating means, whereby when the binder is stiff, minor flexure of the device causes rupture of the microcapsules and releases the indicating means. This device has a non-stiff state such that a given strain applied to the binder layer in the non-stiff state will not release the indicating means, and a stiff state such that the same given strain applied to the binder layer in the stiff state will release the indicating means. Also disclosed is a method for determining exposure of an article to a given low temperature.
    Type: Grant
    Filed: February 17, 1993
    Date of Patent: July 5, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Daniel B. Pendergrass, Jr.
  • Patent number: 5304585
    Abstract: Organic esters of chlorine-containing or bromine-containing phosphorus acids and BIS-GMA, and organic esters of phosphorus acids having chlorine or bromine bonded directly to phosphorus (are described), the organic radical of said esters containing at least one polymerizable functional group. Also described are dental line, restorative, composite, and adhesive compositions containing such organic esters, as well as methods for using such compositions to repair or veneer dental tissue.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: April 19, 1994
    Assignee: Minnesota Mining and Manufacturing
    Inventor: James E. Bunker
  • Patent number: 5294438
    Abstract: The lubricity of any shaving preparation is enhanced by providing an emollient oil and a thermoplastic polymeric elastomer additive in an amount effective to increase its lubricity. Specific shaving preparations suitable for application to human or animal skin may comprise at least 5% by weight of an emollient oil, and a thermoplastic polymeric elastomer additive in a ratio of emollient oil to additive of between about 5:1 and 20:1, and preferably in a ratio of between about 8:1 and 10:1. Shaving creams generally contain 5-30% of an emollient oil, a thermoplastic polymeric elastomer additive present in a ratio of emollient oil to additive of between about 5:1 and 20:1, and at least 5% by weight of soap, detergent or a combination thereof.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: March 15, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert W. H. Chang, Wayne K. Dunshee, Jeffrey F. Andrews
  • Patent number: 5271522
    Abstract: A dispenser for bandages is provided wherein bandages adhered to successive bandages along opposite ends of the bandage are dispensed from a box between a pair of flexible fingers extending into an opening in the top wall of the box. Various configurations for the stack of bandages to be provided in the box are also disclosed.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: December 21, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Su-sen Ko, David C. Byram
  • Patent number: 5270068
    Abstract: Adhesively edge-padded stack of carbonless copy paper better separates upon fanning into collated sets when a thin layer of hot-melt adhesive is used for the edge-padding. As in the prior art, the outer surfaces of each set should have a release coating such as a fluorocarbon. The layer of hot-melt adhesive includes, by weight:20-50% thermoplastic copolymer,15-50% tackifying resin, and20-60% wax having a melting point of at least 60.degree. C.As soon as the adhesive has cooled below its softening point, the stack can be fanned, thus breaking it into sets. Fanning can usually be performed within 45 seconds, because there is no need to wait for the adhesive to dry as has been necessary with the aqueous adhesives that have been used in the prior art. Preferably at least 20% by weight of the adhesive is a paraffin wax that is C.sub.35 -C.sub.70 substantially straight-chain hydrocarbon.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: December 14, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kenneth J. Perrington, James M. DeWanz
  • Patent number: 5268214
    Abstract: A sampler for delivery of microencapsulated liquid material has a protective treatment disposed on the substrate sheet overlying ink on the sheet, with microcapsules comprising microencapsulated organic liquid capsule fill disposed on at least a portion of the protective treatment and overlying at least a portion of the ink. The protective treatment is water-stable and organic liquid capsule fill-stable, and is a polymeric solution or emulsion that may be coated on the substrate sheet in a standard coating process in line with the printing of ink on the substrate sheet, and will cure in line to provide the desired protective properties.
    Type: Grant
    Filed: September 4, 1991
    Date of Patent: December 7, 1993
    Assignee: Minnesota Mining and Manufacturing
    Inventor: Jack W. Charbonneau
  • Patent number: 5256447
    Abstract: An adhesive composition comprising an ethylenically unsaturated phosphorylated compound, a carboxylic acid functional polymer, and a polymerization initiator, and optionally comprising a particulate metallic filler. Also disclosed is a method of adhering a restorative material such as amalgam to hard tissue such as dentin or enamel, involving the use of an adhesive composition of the invention as an intermediate layer between the restorative material and the hard tissue.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: October 26, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Joel D. Oxman, Jon W. Fundingsland
  • Patent number: 5232983
    Abstract: Acrylate or methacrylate compositions are provided for coating porous surfaces, wherein the composition comprisesa) 90-99.9% acrylate and/or methacrylate monomers, andb) 0.1 to 5 percent wax.The wax in these compositions is soluble in the acrylate and/or methacrylate monomers when the monomers are in a liquid state. The wax is incompatible with a cured coating formed from the polymerization of the acrylate and/or methacrylate monomers.The compositions cure to provide a non-tacky surface in excellent short time periods as compared to prior similarly constituted acrylate or methacrylate compositions.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: August 3, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: George W. Frost
  • Patent number: 5229453
    Abstract: A hydrophilic polyurethane prepolymer in a compatible, water-miscible solvent or solvent blend having a solids content of greater than about 10 and less than about 50 percent prepolymer in organic solvent that reacts with water at about a 1:1 ratio by volume to produce an excellent gel for use in sealing water containing structures and soil stabilization. In the cure process, the compositions of the present invention expand less than 50%, and preferably less than 30%.
    Type: Grant
    Filed: June 4, 1991
    Date of Patent: July 20, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Gary P. Roberts
  • Patent number: 5209924
    Abstract: A novel topical medicinal composition is described which comprises a copolymer which has both pendant fluorochemical groups and pendant polysiloxane grafts.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: May 11, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James E. Garbe, Steven S. Kantner, Kanta Kumar, Smarajit Mitra
  • Patent number: 5197945
    Abstract: A wound dressing of alginate staple fibers has improved integrity when its fibers have been hydroentangled. Even when its basis weight is as low as 50 g/m.sup.2, the resulting wound dressing, when saturated with saline fluids, can be removed by forceps from a wound as a single piece, having little or no residue in the wound. At basis weights below 50 g/m.sup.2, the wound dressing preferably includes reinforcing fibers such as rayon.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: March 30, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Susan M. Cole, David L. Nelson
  • Patent number: 5198301
    Abstract: Films are provided made from ionomeric polymer resins with 2-40% by weight of a filler material, where the film has a thickness between 0.050 and 0.127 mm. These films are highly flexible and conformable. Adhesive composites comprising these films are also provided.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: March 30, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Patrick J. Hager, Del A. Kauss, Janet T. Keller
  • Patent number: RE34902
    Abstract: This invention relates to non-pressure sensitive topical binder compositions comprising a copolymer having a vinyl polymerica backbone with grafted pendant siloxane polymeric moieties and to a method of topically coating animals therewith.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: April 11, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Smarajit Mitra, James E. Garbe