Patents Represented by Attorney, Agent or Law Firm Walter N. Kirn
  • Patent number: 5702720
    Abstract: A transdermal drag delivery device involving an acrylate or methacrylate based copolymer, a skin penetration enhancer, a polyvinylpyrrolidone polymer, and a therapeutically effective amount of flurbiprofen.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jochem Effing, Eberhard Gruhlke, Kristin Godbey, Wolfgang Welsing
  • Patent number: 5702603
    Abstract: There is provided a liquid filter formed of a pleated filter material or laminate where the pleat folds are closely adjacent such that they are separated by less than 6 mm. The downstream pleat tips are supported by a rigid support structure of an open porous lattic or the like. Between the downstream pleat tips and the rigid support structure is a self-sealing fibrous cover layer having an effective mean flow pore size (MFPS) greater than the effective MFPS of the pleated filter material.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: December 30, 1997
    Inventors: Todd W. Johnson, David G. Fabio
  • Patent number: 5702637
    Abstract: Fluorine-containing, chiral liquid crystal compounds comprise (a) a chiral fluorochemical terminal portion containing at least one methylene group and optionally containing at least one catenary ether oxygen atom; (b) a saturated, chiral or achiral, hydrocarbon terminal portion; and (c) a central core connecting the terminal portions. The compounds have smectic mesophases or latent smectic mesophases and are useful, for example, in liquid crystal display devices.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gilbert C. Johnson, Marc D. Radcliffe, Patricia M. Savu, Daniel C. Snustad, Terence D. Spawn
  • Patent number: 5702250
    Abstract: A dental impression tray includes at least one array of solid state light emitters for curing photocurable impression material received in a channel of the tray. The tray includes a body presenting the channel, and a housing that is detachably connected to the body. The tray preferably includes a battery that extends along a buccolabial side of the tray body and as a result is received in the patient's oral cavity when an impression is taken.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventor: Cary A. Kipke
  • Patent number: 5702527
    Abstract: A coating device has a first half and a second half located adjacent the first half to form a slot between the first and second halves. A porous material, having a thickness greater than the height of the slot, is disposed in the slot to compress uniformly along its width. The porous material has a porosity and a height selected in combination with each other to create a predetermined pressure drop through the slot and to maintain the pressure drop to create the desired flow rate along the slot width. The size of the pores in the porous material can be less than 25 .mu.m and the exit pressure drop through the slot can be at least one thousand times greater than could be obtained without the porous material.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Albert E. Seaver, Lyle N. Scheel, Luther E. Erickson, Daniel R. Danielson
  • Patent number: 5702494
    Abstract: An efficient, light-weight airbag inflation filter includes a gas-permeable, substantially rigid support tube having a plurality of uniform perforations therethrough. A filtering element formed from a continuous inorganic ceramic yarn or roving is helically cross-wound around the support tube to form one or more layers covering the perforations of the support tube. A wire screen, having openings therethrough smaller than the perforations in the support tube, is disposed between the filtering element and the support tube to act as a gas diffusion layer for the gases passing through the inflation filter.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Thomas L. Tompkins, Ryan C. Shirk, Steven C. Schroeer, Richard P. Merry, Troy K. Ista, Richard L. Bloom
  • Patent number: 5702876
    Abstract: The present invention relates to a photographic film base comprising a transparent support base and a binderless layer of magnetic material coated thereon.According to another aspect, the present invention relates to a color photographic material comprising a photographic film base and at least one light-sensitive layer coated thereon, wherein said photographic film base comprises a transparent support base and a binderless layer of magnetic material coated thereon.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Phillip A. Taylor, Jeffrey M. Florczak, Mark A. Peterson, Paul R. Iverson, Joseph Skorjanec, Robert D. Lorentz
  • Patent number: 5702753
    Abstract: A method of making and using diagnostic electrodes is disclosed. The method of making involves the coating of both conductive adhesive and biocompatible pressure sensitive adhesive on to a flexible non-conductive backing material on a side that has at least a portion thereof covered with an electrically conductive surface. The method of coating the electrodes is very cost efficient and economical. The use of the electrode enjoys the advantage of controlled coating thicknesses such that both types of adhesive in their final thicknesses have contact with skin of a patient.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining And Manufacturing Company
    Inventors: Rafael M. Yasis, Rosa Uy, Barbara J. Marcus, Steven S. Kantner
  • Patent number: 5702879
    Abstract: The present invention relates to a process for preparing monodispersed tabular silver halide grain emulsions, said process comprising the following steps:(a) forming a population of silver halide nuclei in a dispersing medium having a pH lower than 3 and a pBr in the range of from 1 to 2,(b) ripening said population of silver halide nuclei in presence of a silver halide solvent,(c) performing a first growing of said silver halide nuclei at a pBr value in the range of from 1 to 2, and(d) performing a second growing of said silver halide nuclei at a value in the range of from 2 to 2.7.According to a preferred embodiment of the present invention a polyalkylene oxide-polyalkylsiloxane copolymer is present during at least one of the above mentioned steps (a) to (d). The process of the present invention enable the growth of monodispersed tabular silver halide grain emulsions having a reduced amount of non-conforming grains and a lower coefficient of variation (COV).
    Type: Grant
    Filed: February 27, 1996
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard A. Barcock
  • Patent number: 5702556
    Abstract: The present invention relates to a method and apparatus for producing a laminated product in which the deformation of a base element and the squeeze-out of a viscoelastic element from the periphery of the base element can be eliminated.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kiyoshi Okuma, Koichiro Saegusa, Ryozo Shiono
  • Patent number: 5702509
    Abstract: A self-emulsifying, liquid treatment composition comprises the polysiloxane reaction product of (a) at least one alkoxysilane, alkoxysiloxane, or siloxane compound comprising at least one hydrophobic moiety selected from the group consisting of alkyl, aryl, aralkyl, and alkaryl moieties; (b) at least one alkoxysilane, alkoxysiloxane, or siloxane compound comprising at least one hydrophilic moiety selected from the group consisting of protonated and unprotonated azaalkyl and silyl-containing azaalkyl moieties; and (c) at least one fluorine-containing alkoxysilane compound which is capable of reaction with component (a) and/or component (b) and which comprises at least one perfluoroalkyl group having at least four carbon atoms and optionally containing one or more catenary ether oxygen atoms. The composition can be used to render substrates, especially porous substrates (e.g., concrete, wood, or masonry), both water- and oil-repellent.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: December 30, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Mark J. Pellerite, Larry D. Rich, James F. Sanders
  • Patent number: 5701561
    Abstract: A toner station for use in single-pass or multi-pass electrostatic printers includes two or more toner applicators for each color, thereby increasing the printing speed without degrading print quality.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: December 23, 1997
    Assignee: Minnesota Mining And Manufacturing Company
    Inventor: Thomas A. Speckhard
  • Patent number: 5700302
    Abstract: A method of preparing an abrasive article, and the article produced therefrom is provided. The method includes the steps of: providing a backing having a first major surface; coating the first major surface of the backing with a tie coat precursor, wherein the tie coat precursor comprises a first radiation curable component; applying an abrasive slurry to the first major surface of the backing after coating the tie coat precursor thereon, wherein the abrasive slurry comprises a plurality of abrasive particles and a binder precursor, and further wherein the binder precursor comprises a second radiation curable component; at least partially curing the tie coat precursor; and at least partially curing the binder precursor to form an abrasive article, wherein the abrasive article comprises a backing, an abrasive layer, and a tie coat disposed between the backing and the abrasive layer. Preferably, the method provides a structured abrasive article.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: December 23, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William L. Stoetzel, Scott R. Culler
  • Patent number: 5699593
    Abstract: There is provided a loop fastening material for engaging a suitable male mechanical fastening element for a backing substrate of an oriented sheet material having a first face and a second face and substantially continuously attached to at least the first face a plurality of discrete, multi-filament transversely expanded yarns, such yarn filaments providing open loop structures. The yarns are expanded by transverse orientation of the backing to which it has been previously attached by extrusion bonding, adhesive bonding or the like. The resulting loop fastener provides a low cost, readily manufactured loop having good fastening properties to hook materials.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: December 23, 1997
    Assignee: Minnesota Mining & Manufacturing Company
    Inventor: Byron M. Jackson
  • Patent number: 5699188
    Abstract: A metal-coated multilayer mirror having high reflectivity and high specularity. The mirror comprises a multilayered polymer film and a reflective metal layer. The multilayered polymer film preferably comprises layers of a crystalline, semi-crystalline, or liquid crystalline material, such as a naphthalene dicarboxylic acid polyester, having an average thickness of not more than 0.5 microns and layers of a second polymer having an average thickness of not more than 0.5 microns. Preferably, the layers of semi-crystalline naphthalene dicarboxylic acid polyester have a positive stress optical coefficient. The reflective metal layer comprises a metal selected from the group consisting of silver, gold, aluminum, nickel, copper, and titanium, with silver and aluminum being particularly preferred. The metal-coated multilayer mirrors are useful in applications requiring broad bandwidth reflection, high specularity, low manufacturing costs, and high reflectivity.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: December 16, 1997
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Laurence R. Gilbert, Andrew J. Ouderkirk
  • Patent number: 5699139
    Abstract: A liquid crystal display (LCD) having an active area for display of information and an inactive area adjacent the active area. The inactive area includes a pressure relief region for relieving pressure generated within the cell, thereby minimizing the effects of pressure variation in the active area. The display is comprised of two substrates, at least one of which is flexible, which are joined at their peripheries. A plurality of spacer members placed between the substrates insures a uniform gap between the substrates in the active area. The spacer members are preferably attached to both of the substrates in the active area, but to at most one of the substrates in the inactive area. The pressure relief region serves to relieve pressure within the display (usually caused by temperature changes) by flexure of the flexible substrate, thereby eliminating distortions within the active area.
    Type: Grant
    Filed: July 5, 1995
    Date of Patent: December 16, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: David J. W. Aastuen, Robert P. Wenz
  • Patent number: 5698217
    Abstract: A transdermal drug delivery device involving a carrier containing a dissolved drug. The device also involves a desiccant package that is inert to the carrier, permeable to water vapor, and defines a desiccant compartment containing a desiccant. The device also involves water vapor impermeable product package that contains the carrier and the desiccant package.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: December 16, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Shari L. Wilking
  • Patent number: 5697158
    Abstract: The present invention comprises a module for a surgical driver of the type having a handle and a barrel with an axis. The module comprises a releasable attachment mechanism for releasably attaching the module to the surgical driver, a tool mounting mechanism for releasably receiving an orthopedic surgical tool, and a rotational orientation mechanism for orienting the tool mounting mechanism in a plurality of angular positions about an axis of the barrel. The device includes a releasable locking mechanism for releasably locking the rotational orientation mechanism in one of a plurality of discrete angular positions about the axis of the barrel. The releasable locking mechanism has a locking member movable between lock and release positions. A spring biases the locking mechanism toward the lock position. The novel locking mechanism of the present invention may also be used in non-modular devices.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: December 16, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William P. Klinzing, Martin P. Babcock
  • Patent number: D387744
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: December 16, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kenneth J. Kirchhoff, Robert J. Wolf, Lawrence J. Fenske, Manfred W. Suhr
  • Patent number: D387806
    Type: Grant
    Filed: June 19, 1996
    Date of Patent: December 16, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Casey L. Carlson, Daniel E. Siltberg