Patents Represented by Attorney, Agent or Law Firm Robert W. Sprague
  • Composition containing lactone and ester for removing coatings
    Patent number: 5413729
    Abstract: The present invention comprises a composition for removing coatings such as paints from substrates which comprises at least one ester and at least one lactone. The present invention further comprises a method for removing coatings.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: May 9, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Kimberley A. Gaul
  • Silicone release composition
    Patent number: 5409773
    Abstract: A composite structure comprising a substrate bearing a layer of release coating prepared from one or more epoxypolysiloxanes together providing cycloaliphatic epoxy group(s) and non-cycloaliphatic (i.e., linear or branched aliphatic) epoxy group(s). The resulting release coating cures quickly and exhibits low release levels to adhesives. An oligomeric epoxypolysiloxane comprising both cycloaliphatic and non-cycloaliphatic epoxy groups is also disclosed.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: April 25, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Carl R. Kessel, Maureen C. Nelson
  • Polymerizable compositions
    Patent number: 5387661
    Abstract: Polymerizable compositions comprising (a) hydroxypropyl methacrylate; (b) a C.sub.8 to C.sub.10 alkyl ester of acrylic or methacrylic acid; (c) a crosslinking agent; (d) a promoter; and (e) a free-radical initiator.
    Type: Grant
    Filed: May 13, 1994
    Date of Patent: February 7, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: George W. Frost
  • Rackets having damping elements
    Patent number: 5374057
    Abstract: A racket is provided with at least one damping element which is secured and positioned on the racket to substantially dampen the frame vibration of the racket when hit by a ball, shuttlecock or other object.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: December 20, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ming-Lai Lai, Edmond J. Nielsen
  • Method of removing caulk
    Patent number: 5360489
    Abstract: The present invention is a method of removing caulk from a substrate. In this method, a composition comprising an organic solvent or a mixture of two or more organic solvents having a solubility parameter of at least about 8.4, a polar index greater than about 3 and a hydrogen bonding index greater than about 2 and water is applied to the caulk in order to loosen and remove the caulk.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: November 1, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kimberley A. Gaul, Judith M. Jensen
  • Silicone release compositions
    Patent number: 5332797
    Abstract: A composite structure comprising a substrate bearing a layer of release coating prepared from one or more epoxypolysiloxanes together providing cycloaliphatic epoxy group(s) and non-cycloaliphatic (i.e., linear or branched aliphatic) epoxy group(s). The resulting release coating cures quickly and exhibits low release levels to adhesives. An oligomeric epoxypolysiloxane comprising both cycloaliphatic and non-cycloaliphatic epoxy groups is also disclosed.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: July 26, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Carl R. Kessel, Maureen C. Nelson
  • Fabric repellent treatment from hydrocarbon solvent system
    Patent number: 5284902
    Abstract: The present invention comprises a flourochemical composition exhibiting water and oil repellency properties which is soluble in an a hydrocarbon solvent system which is non-halogenated or substantially free of halogens and strong carbonyl solvents.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: February 8, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Charles D. Huber, Richard J. Grant, Richard S. Smith
  • Imaging manifold
    Patent number: 5283092
    Abstract: This invention relates to an imaging sheet manifold comprising a transparent polymeric sheet imageable in an imaging machine and an opaque sheet adhered thereto by means of a removable pressure-sensitive adhesive. The adhesive comprises a) 50-90% by weight of a lower alkylacrylate the alkyl chains of which can be from 4-12 carbon atoms; b) 10-50% by weight of a higher alkylacrylate or methacrylate, the alkyl chains of which can be from 12 to 26 carbon atoms, and c) a crosslinker. This invention also comprises a method of making the novel imaging manifold.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: February 1, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Albert I. Everaerts, Jeffrey D. Malmer, Michael J. Louis
  • Substituted pentafluoroantmonic acid-substituted aniline epoxy curing catalysts
    Patent number: 5280067
    Abstract: A two-part, thermally curable epoxy composition comprising an epoxy resin; a curing agent prepared from a substituted pentafluoroantimonic acid and a substituted benzene having an amino substituent and an electron-withdrawing substituent on the benzene ring; a polyol; and a toughening agent. The compositions exhibit desirable green strength and pot life.
    Type: Grant
    Filed: August 18, 1992
    Date of Patent: January 18, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kent S. Tarbutton, Janis Robins, Virginia C. Markevka
  • Interpenetrating pressure-sensitive adhesive polymer networks
    Patent number: 5266402
    Abstract: A pressure-sensitive adhesive comprising an acrylate matrix, and swellable, infusible, insoluble, elastomeric acrylate microspheres, each of the microspheres having discrete boundaries, the microspheres and the matrix forming an interpenetrating polymer network within the boundaries of the microspheres.
    Type: Grant
    Filed: December 18, 1990
    Date of Patent: November 30, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Joaquin Delgado, Spencer F. Silver, Margaret M. Sheridan
  • Abrasion-resistant coating composition and abrasion resistant energy control sheet
    Patent number: 5227185
    Abstract: A laminate comprising a polyolefin film having a hardened coating adhered to one surface thereof. The coating is abrasion resistant and is the photopolymerization reaction product of starting materials comprising hydantoin hexacrylate and a fluorinated surfactant. The laminate finds particularly useful application as a component of energy control window films. An abrasion resistant coating composition is also disclosed.
    Type: Grant
    Filed: June 8, 1992
    Date of Patent: July 13, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Norma E. Gobran
  • Pressure-sensitive adhesive
    Patent number: 5202361
    Abstract: Radiation-curable, tackifier-free compositions are provided which contain: (i) a blend of certain acrylate esters and monoethylenically-unsaturated copolymerizable monomers; (ii) certain .alpha.-olefin polymers; and (iii) a photoinitiator and optionally, a crosslinker. Pressure-sensitive adhesives having good adhesion to both low and high energy surfaces as well as possessing excellent low and high temperature performance properties are prepared by exposing the radiation-curable compositions to light having a wavelength in the range of from about 280 to 400 nm.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: April 13, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Patrick G. Zimmerman, Gaddam N. Babu, Lang N. Nguyen, Ingrid E. Blair, George F. Vesley
  • Release liner
    Patent number: 5178924
    Abstract: A release liner comprising:(a) a reinforced, non-woven sheet composite comprising two layers, one of the layers being composed of a plurality of substantially randomly orientated fibers and the other layer being composed of substantially lineally-aligned fibrous reinforcement material; and(b) a release layer on one or more of the layers of the non-woven sheet composite, the release layer comprising at least one of the following: an olefinic homopolymer, an olefinic copolymer, or a copolymer of an olefin and a polar comonomer.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: January 12, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Michael A. Johnson, Maurice H. Kuypers
  • Branched alkoxyphenyl iodonium salt photoinitiators
    Patent number: 5144051
    Abstract: Disclosed are C.sub.6 to C.sub.11 branched chain alkoxy monosubstituted diaryl iodonium salts, such as [4-(2-ethylhexyloxy)phenyl]phenyliodonium hexafluoroantimonate. These diaryl iodonium salts are useful as photoinitiators for epoxy containing compounds, especially epoxysilanes.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: September 1, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Carl R. Kessel, Ellen O. Aeling
  • Substituted di-t-butylphenols and anti-allergic use thereof
    Patent number: 5049572
    Abstract: Novel compounds which are 2,6-di-t-butylphenols substituted in the 4 position by a carbamyl or acylamino group, which carbamyl or acylamino group is substituted by a group which includes an acidic substituent are useful as inhibitors of leukotriene biosynthesis and as antiallergic agents. Pharmacological methods for using such compounds and synthetic intermediates for preparing such compounds are also disclosed.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: September 17, 1991
    Assignee: Riker Laboratories, Inc.
    Inventors: Robert A. Scherrer, Mark A. Rustad
  • Impact resistant container for hazardous materials
    Patent number: 5029699
    Abstract: A container has a self-sustaining housing filled with a first sorbent body of compressed polyolefin microfibers, which body is formed with at least one pocket that snugly receives a vessel holding hazardous materials. The container is closed by a lid which is filled with a second sorbent body of compressed polyolefin microfibers, and when the lid is in place, the second body presses against the vessel to hold it snugly in place. At least a portion of the first sorbent body has a solidity of less than 20%, making it highly sorbent of liquids so that it can sorb any liquid that might leak from the vessel and thus help to prevent the liquid from escaping from the container.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: July 9, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Thomas I. Insley, Laurel A. Alvarez
  • 3-Amino or 3-nitro quinoline compounds which are intermediates in preparing 1H-imidazo[4,5-c]quinolines
    Patent number: 4988815
    Abstract: A process for the preparation of 1-substituted, 4-substituted-1H-imidazo[4,5-c]quinolines, intermediates in the preparation of such compounds, and processes for the preparation of such intermediates.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: January 29, 1991
    Assignee: Riker Laboratories, Inc.
    Inventors: Jean-Denis Andre, Daniel Lagain
  • Triazolo[1,5-c]pyrimido[1,4]azines as bronchodilators
    Patent number: 4981850
    Abstract: Substituted 1,2,4-triazolo[1,5-c]pyrimido[1,4]-azines have been found to have potent bronchodilator activity. Also, pharmacological methods for inducing bronchodilation using such compounds, pharmaceutical compositions containing such compounds, and synthetic intermediates, including 1,2,4-triazolo[4,3-c]-pyrimido[1,4]azines, for preparing such compounds.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: January 1, 1991
    Assignee: Riker Laboratories, Inc.
    Inventor: James J. Wade
  • Chemiluminescent methods and a kit therefor involving a beta-lactam
    Patent number: 4977080
    Abstract: Methods for the detection and measurement of compounds containing beta-lactam rings by chemiluminescence of the compounds in the presence of a chemiluminescent compound such as luminol, and for improving the sensitivity of assays using chemiluminescent reactions such as the luminol reaction utilizing compounds containing beta-lactam rings are described. A kit for conducting such chemiluminescent assays is also described.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: December 11, 1990
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventor: Dean S. Milbrath
  • Substituted biphenyl derivatives
    Patent number: RE33574
    Abstract: Novel compounds which are 2,6-di-tertiary-butylphenols substituted in the 4 position by an acylaminophenyl group, which acylaminophenyl group is substituted by a moiety which includes a carboxyl group, are useful as inhibitors of leukotriene biosynthesis and as antiallergic agents.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: April 23, 1991
    Assignee: Riker Laboratories, Inc.
    Inventors: Alan R. Kirk, Robert A. Scherrer