Patents Represented by Attorney Cruzan Alexander

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  • Filamentary structure
    Patent number: 4384022
    Abstract: A filamentary structure comprises a spiral thermoplastic core filament disposed within a thermoplastic sheath component, consisting either of a tube or of at least three thermoplastic filaments, the sheath component being joined to the successive turns of the spiral core filament. The spiral core filament and the sheath component may comprise the same or different thermoplastic polymers, suitable polymers being polyamides, polyesters and polyolefins.The core filament and the sheath component may be extruded together from a spinning jet, and a plurality of the filamentary structures may be extruded side-by-side so that their sheath components are joined together to form a fabric structure.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: May 17, 1983
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventor: Anthony J. Fowler
  • Extension of polyurethane hydrogel cure time
    Patent number: 4383079
    Abstract: The cure time of polyurethane prepolymer curable with water to form polyurethane hydrogel is prolonged by the addition to the water of certain micelle-forming adducts which substantially extend the cure time.
    Type: Grant
    Filed: April 9, 1981
    Date of Patent: May 10, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Alton J. Gasper, James N. Wells
  • Staple supporting and staple removing strip
    Patent number: 4382326
    Abstract: A staple-supporting strip for use with staples when binding documents together which affords removal and retention of the staples without detrimental affect on the document. The staple-supporting strip comprises two narrow layers of tough flexible polymeric material between about 0.1 and 0.15 mm thick. The strip may be colored or printed with a staple target area and a coating of a pressure-sensitive adhesive holds the bottom layer of the strip on the uppermost sheet of the documents to be stapled together such that the top layer may be peeled from the lower layer to unclench the staple legs during removal.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: May 10, 1983
    Assignee: Minnesota Mining & Manufacturing Company
    Inventor: George R. Rabuse
  • Control system for transducer positioning motor
    Patent number: 4383209
    Abstract: A control system for a stepper motor utilized in positioning a transducer in relationship to a plurality of parallel tracks on a record media. Dual closed loop feedback systems are provided. A current control circuit is provided having a high output impedance and a voltage control circuit is provided having a low output impedance. A switch may select the control sensor when the transducer is making coarse adjustments in position and may select the voltage control sensor when the transducer is making fine adjustments in position. A seamless switchover may be achieved where the voltage control sensor has a time constant which matches the time constant of the stepper motor. Performance is further improved by providing an impedance cancellation circuit which eliminates the internal resistance of the motor in order to quickly damp motionally induced emf of the motor.
    Type: Grant
    Filed: October 15, 1980
    Date of Patent: May 10, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Martyn A. Lewis
  • Multi-core cable connection for medium voltage cable
    Patent number: 4381424
    Abstract: A multi-core cable connection for medium voltage cables in which each core connection includes a pair of prefabricated permanently elastic stress control elements, each of which has a sleeve-like main body of insulating material and a conductive sleeve-like insert in the body, extending out of one end thereof and bridging the core insulation and the conductor connector.
    Type: Grant
    Filed: April 28, 1981
    Date of Patent: April 26, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Harold C. Hervig, Dieter Kehr, Raymond Krabs
  • Device to slow solenoid actuation motion
    Patent number: 4381491
    Abstract: A device for slowing down the movement of the armature within a solenoid comprising a resilient container having a predetermined internal volume, and a dilatant material filling the container which material has as one of its properties at ambient temperatures, a non-resilient deformation when subjected to slow steady state stress, and a highly resilient resistance to deformation when subjected to rapid shock-like stress, whereby the container is connected to the solenoid in a manner affording its compression as the armature moves within the solenoid.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: April 26, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Peter J. Vogelgesang
  • N,N-Diacylaminoperfluoroalkanesulfonanilides and derivatives thereof
    Patent number: 4380464
    Abstract: Disclosure is made of certain optionally substituted N,N-diacylaminoperfluoroalkanesulfonanilides and agriculturally acceptable salts thereof which are useful as herbicides and plant growth regulators.
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: April 19, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ezzat A. Mikhail
  • Stapling tool
    Patent number: 4380312
    Abstract: A tool for applying fasteners to fasten an article to the workpiece. A compressible foot is provided to limit the drive distance of a plunger to position dependent upon the thickness of the article. A drive groove in the tool provides support for the fastener until it is driven into the workpiece. The fastener may be a plastic staple and multiple driving strokes may be used to drive the staple into the workpiece. A retainer activated by the compressible foot may be utilized to prevent the advancement of the next staple to the drive position while multiple drive strokes are being used.
    Type: Grant
    Filed: July 17, 1980
    Date of Patent: April 19, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Edward L. Landrus
  • Antimicrobial 8-cyano-6,7-dihydro-5-methyl-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxyl ic acids
    Patent number: 4380543
    Abstract: The compounds 8-cyano-6,7-dihydro-5-methyl-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acid and 8-cyano-6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H-benzo[ij]quinolizine-2-c arboxylic acid are disclosed as potent antimicrobial agents. Pharmaceutically-acceptable carboxylate salts, esters, acyl chlorides, amides and alkylaminoalkyl ester salts of the acids are also disclosed.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: April 19, 1983
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Variable focal length projection lens for use on overhead projectors
    Patent number: 4380374
    Abstract: A variable focal length overhead projector lens having four elements positioned in a projection head with two elements on either side of a folding mirror and having a single movable negative lens element closest to the screen being movable to vary the focal length and magnification at a fixed object-to-image distance to fill the screen.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: April 19, 1983
    Assignee: Minnesota Mining & Manufacturing Company
    Inventor: Dennis F. Vanderwerf
  • Developer compositions having layer of a pigment on the surface thereof
    Patent number: 4379824
    Abstract: A developer composition capable of developing electrostatic images on dielectric surfaces is disclosed. The composition has an electrical conductivity of at least 10.sup.-6 ohm.sup.-1 centimeter.sup.-1 and utilizes a small dimension powdered material as a coating on the essentially smooth surface of individual spheroids of a toner. The composition reduces background coloration on finished copies and eliminates the need to bias the magnetic development roll.
    Type: Grant
    Filed: April 17, 1981
    Date of Patent: April 12, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Stanley B. Collins
  • Liquid sorbent materials
    Patent number: 4379804
    Abstract: Composite, liquid-sorbent media which can be applied to various substrates to provide improved liquid-sorbent materials. The composite media comprise a liquid-sorbent underlayer and, overlying said underlayer, a liquid-permeable surface layer, the liquid sorptivity of said underlayer being greater than the liquid sorptivity of said surface layer. Transparent sheets having the liquid-sorbent composite media coated on the surface are described as a preferred embodiment of the invention.
    Type: Grant
    Filed: September 17, 1980
    Date of Patent: April 12, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John F. Eisele, Elizabeth A. Mercer
  • Black image from a thermographic imaging system
    Patent number: 4379835
    Abstract: A thermographic imaging system comprising a single layer and capable of providing a stable dark to black image upon localized heating is disclosed. The single layer comprises a polymeric binder, a combination of at least two leuco dyes, and a nitrate salt.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: April 12, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert D. Lowrey, Howard D. Nelson, George Van Dyke Tiers
  • Waste water treatment by chelation-gelation
    Patent number: 4379763
    Abstract: Contaminant components in waste water are complexed with a chelating agent and the complexed component is gelled with a polyurethane prepolymer to provide a gelled mass.
    Type: Grant
    Filed: October 15, 1980
    Date of Patent: April 12, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Lawrence M. Clemens, Alton J. Gasper
  • Multiacrylate cross-linking agents in pressure-sensitive photoadhesives
    Patent number: 4379201
    Abstract: Pressure-sensitive adhesive tape having a photopolymerized acrylate polymer adhesive which has been crosslinked by a polyacrylic-functional crosslinking monomer such as trimethyol-propane triacrylate.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: April 5, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Steven M. Heilmann, John D. Moon
  • Radiation-curable polymers
    Patent number: 4378411
    Abstract: A composition comprising a radiation-curable polymer, said polymer being crosslinkable and having pendant ethylenically unsaturated peptide groups is disclosed. Such polymers are useful in the field of graphic arts.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: March 29, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Steven M. Heilmann, Frederick J. Palensky, Jerald K. Rasmussen
  • Photopolymerizable epoxy-containing compositions
    Patent number: 4378277
    Abstract: Photopolymerizable epoxy compositions which comprise an epoxy-containing material and photosensitive aromatic iondonium salt of a halogen-containing complex ion are described as are coated substrates and methods for bonding materials together using such compositions.
    Type: Grant
    Filed: March 10, 1978
    Date of Patent: March 29, 1983
    Assignee: Minnesota Mining & Manufacturing Company
    Inventor: George H. Smith
  • Easy open closure system
    Patent number: 4378074
    Abstract: An easy opening closure system comprising a container end portion having an opening and a scored portion adjoining the opening. An exterior tape and interior sheet material cover the opening and sandwich the scored portion. Removal of the exterior tape initiates tear of the scored portion and permits the scored portion to be pulled back away from the opening to enlarge the opening. A preferred easy opening closure system includes a reinforcing member which is adhered to the underside of the scored portion and to the exterior tape in the area of the opening. The reinforcing member facilitates bending of the scored portion away from the opening.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: March 29, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Wilfred R. Brochman
  • Stacking mechanism
    Patent number: 4377363
    Abstract: A machine which forms openings in can ends and seals the openings with manually removable lengths of tape. The machine includes a mechanism for transporting the taped disk-like objects from holders moving seriatim along a path to the bottom of a stack of the disk-like objects. The mechanism includes a shoe that separates the objects from the holders, and a wheel which carries the separated objects to a stop with the objects aligned with the stack, and then moves the objects into the stack.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: March 22, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard A. Patterson
  • Combined cartridge holder and nozzle assembly
    Patent number: D268956
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: May 10, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Paul E. DuFresne