Patents Represented by Law Firm Alexander, Sell, Steldt & DeLaHunt
  • Fuser blanket
    Patent number: 3967042
    Abstract: A composite laminate structure is provided which is suitable for use as a fuser blanket in copiers or reproducers which are based on heat fixing of images on receptor surfaces. The structure is comprised of a dimensionally stable, heat conductive substrate having bonded to one surface thereof a thin, resiliently compressible layer of a fluorinated elastomeric polymer and an outer layer bonded thereto of a thin, resiliently compressible silicone elastomer.
    Type: Grant
    Filed: January 12, 1973
    Date of Patent: June 29, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Harold B. Laskin, Robert H. Valentine
  • Phenoxy-s-triazine chain coupler for polyesterification and novel polyesters
    Patent number: 3966680
    Abstract: A novel class of chain-coupling compounds for polyesterification reactions which are represented by the formula: ##EQU1## wherein R is an organic radical which will not render the chain-coupling compound thermally unstable at about 280.degree.C, andX is an inert substituentAre added to polyesterification reaction mixtures after initiation of the reaction to produce novel polyesters containing a residue of the chain-coupling compound bound into the polymer chain. Reduced polymerization times and improved thermal stability can be obtained through use of these chain-coupling compounds.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: June 29, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert L. Wear
  • Printable pressure-sensitive adhesive tape
    Patent number: 3967031
    Abstract: Pressure-sensitive adhesive tape having a backsize which is a blend of (1) 5-80 parts cellulose acetate butyrate and (2) 95-20 parts copolyester and/or acrylate copolymer has both printability and low-unwind characteristics. After the back is printed, the tape can be wound into a roll and unwound without destroying the legibility of the printing. The backsize is especially useful on tapes having a polyester or unplasticized polyvinyl chloride film backing, as well as on filament tape or other tapes which have aggressive pressure-sensitive adhesives.
    Type: Grant
    Filed: April 25, 1974
    Date of Patent: June 29, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard J. Lambert
  • Can closure
    Patent number: 3964415
    Abstract: Cans sealed with removable pressure-sensitive adhesive tape tabs over a pour hole successfully contain carbonated beverages or other pressure-generating liquids if the area around the pour hole and under the tape is slightly elevated, thereby putting the tape in shear rather in peel. Circular can ends may be provided with a circular pour hole, taped and then shaped to impart a frusto-conical area around the pour hole before being crimped over the tubular can body.
    Type: Grant
    Filed: January 14, 1975
    Date of Patent: June 22, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Harris W. Viker, William E. Kropp
  • Surgical saw blade fastening means
    Patent number: 3964163
    Abstract: A surgical saw blade fastening means comprising a saw blade and chuck wich provides for positive locking of the blade while permitting rapid removal of the saw blade without the use of additional tools is disclosed. The chuck which is provided with an adapter portion so it can be attached to surgical instruments presently in use comprises a slotted body portion having a pyramid locator at the base of the slots into which the notched end of a saw blade is seated by the action of a knurled internally threaded collar carried on said chuck body in cooperation with the teeth of the saw blade.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: June 22, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Anthony Russo
  • Pressure-fixable developing powder
    Patent number: 3965022
    Abstract: A dry, pressure-fixable, developing powder comprising a thermoplastic component having a low creep compliance and a non-volatile component having a high creep compliance, wherein the low creep compliance material is present in a greater amount by volume than the other component.
    Type: Grant
    Filed: June 29, 1973
    Date of Patent: June 22, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Doyle L. Strong, Curtis Dale Hargadine
  • One-part, room-temperature latent, curable isocyanate compositions
    Patent number: 3963680
    Abstract: A one-part, room-temperature latent, curable isocyanate composition is prepared comprising an aliphatic or aromatic polyisocyanate having dispersed therethrough capsules containing a viscous liquid catalyst solution capable of curing the polyisocyanate. The capsules comprise a shell wall of partially polymerized isocyanate, wherein the partially polymerized isocyanate contains linkages selected from the group consisting essentially of urea, urethane, and isocyanurate linkages.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: June 15, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald R. O'Keefe, A. Joseph Gasper
  • Article transferring apparatus
    Patent number: 3963557
    Abstract: A vacuum applicating apparatus for dispensing and applying measured lengths of tape on a moving substrate. The apparatus has a plurality of rotating applicating segments which are driven by a driving wheel. The segments can be disposed so that tape is fed onto the segments from a continuous supply of tape at a slow speed; the tape is then severed into measured lengths and the lengths are applied in spaced relationship onto a faster moving substrate.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: June 15, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard A. Patterson
  • Silicone-compatible phthalocyanine dyestuffs
    Patent number: 3963744
    Abstract: Phthalocyanine dyestuffs containing the tris(trimethylsilyloxy)silylalkylamino group, ##EQU1## where R.sup.1 is H or lower alkyl are produced and are found to be compatible with cured silicone polymers.
    Type: Grant
    Filed: August 8, 1975
    Date of Patent: June 15, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Carl Mayn Smith, George V. D. Tiers
  • Method for the alteration of a lens and an adhesive lens blocking pad used therein
    Patent number: 3962833
    Abstract: A method for altering a lens whereby a lens is securely bonded to a lens block by a lens adhesive blocking pad having means for accurately aligning the optical center, and optionally the cylinder axis, of the lens with the center point and cylinder axis of the lens block. The invention also includes the adhesive lens blocking pad with alignment means.
    Type: Grant
    Filed: March 31, 1975
    Date of Patent: June 15, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Dee Lynn Johnson
  • Reservoir pad for time indicator
    Patent number: 3962920
    Abstract: Indicating device suitable for visibly measuring parameters such as time, temperature, and time-temperature relationships. The device comprises in combination a porous reservoir pad containing an indicating material, a wick material and activating means. The progress of the indicating material along the wick can be visibly observed to indicate the passage of time, exposure to a given minimum temperature, or a time-temperature relationship. The combination is adapted to conveniently regulate migration of the indicating material from the reservoir pad to the wick. A preferred method for making an indicating device is described.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: June 15, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Wendell J. Manske
  • Positive or negative developable photosensitive composition
    Patent number: 3961961
    Abstract: A positive and negative developable photosensitive composition including a photopolymerizable monomer, photoinitiator, and a blend of polymers, one an acid soluble amino containing polymer, the other a compatible, acid insoluble, film-forming, polymer. The composition, which can be developed positively with dilute aqueous acid or negatively with dilute base, is useful in silk screen printing and as a photoresist composition in general.
    Type: Grant
    Filed: November 20, 1972
    Date of Patent: June 8, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Larry D. Rich
  • 1,1-Bis(perfluoroalkylsulfonyl)ethenes
    Patent number: 3962346
    Abstract: Bis(perfluoroalkylsulfonyl)methanes condense with formaldehyde to give highly reactive 1,1-bis(perfluoroalkylsulfonyl)ethenes which are useful as catalysts for epoxy resins.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: June 8, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Loren L. Barber, Jr., Robert J. Koshar
  • Chain couplers for polyesterification and novel polyesters
    Patent number: 3962190
    Abstract: Addition of polycarboxylic chain coupling compounds of the formula: ##SPC1##To a polyesterification reaction mixture of at least one polyol and at least one polycarboxylic compound (other than the polycarboxylic chain coupling compound) after polyesterification has begun increases the polymerization rate and does not diminish physical properties of the polyester.
    Type: Grant
    Filed: March 7, 1974
    Date of Patent: June 8, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert L. Wear
  • Rigidly bonded green ceramics and processes
    Patent number: 3962162
    Abstract: Thermosetting refractory compositions which require no drying are obtained from unpolymerized unsaturated polyesters and cross-linking vinyl monomers and desired refractories together with mold release materials. Organic fillers may be included to give more porous fired refractories. Danger of blistering of the thermoset shape on firing is counteracted by a volatile material which forms a reticulum of capillaries in the thermoset shape. Compositions may be used for extrusion, molding or injection, thermosetting occurring simultaneously or subsequently.
    Type: Grant
    Filed: February 19, 1974
    Date of Patent: June 8, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Horst W. Schmank
  • Catalytic converter
    Patent number: 3961907
    Abstract: Refractory catalyst supports are secured in metallic containers having different coefficients of thermal expansion by providing at least one layer of a resilient thermally resistant inorganic sheet material or paper between the support and casing and securing the paper and catalyst support in the container by foaming an inorganic material in the space between the sheet material or paper and catalyst support. A further layer of sheet material or paper may be provided adjacent the support with the foam between the separate layers of sheet material.
    Type: Grant
    Filed: December 8, 1972
    Date of Patent: June 8, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James R. Close, William P. Wood, Robert A. Hatch, James R. Johnson
  • Thermoformed polyester articles having impact resistance and high temperature dimensional stability
    Patent number: 3960807
    Abstract: Shaped, thinwalled, thermoformed, heat-set polyester articles having a composition comprising polyester, 2-16% polymeric crack stopping agent, and at least 0.01% nucleating agent, exhibit relatively high temperature dimensional stability and impact resistance.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: June 1, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Larry S. McTaggart
  • Method of containing a resiliently supported rigid ceramic catalyst support
    Patent number: 3959865
    Abstract: Refractory catalyst supports are secured in metallic containers having different coefficients of thermal expansion by providing at least one layer of a resilient thermally resistant inorganic sheet material or paper between the support and casing and securing the paper and catalyst support in the container by foaming an inorganic material in the space between the sheet material or paper and catalyst support. A further layer of sheet material or paper may be provided adjacent the support with the foam between the separate layers of sheet material.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: June 1, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James R. Close, William P. Wood, Robert A. Hatch, James R. Johnson
  • Process for carbodiiomide synthesis
    Patent number: 3960950
    Abstract: Phosphine oxides are prepared from terpenes and are found to be valuable as catalysts in the condensation of isocyanates to yield carbodiimides.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: June 1, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert L. Hansen
  • Silver bleaching solutions
    Patent number: 3960565
    Abstract: Aqueous, non-fixing solutions which have a high efficiency in the removal of silver from a water-penetrable mass are comprised of:1. a water-soluble ferric compound,2. halide ion, and3. a water-soluble compound which releases an inorganic ion and increases the redox potential at constant pH of a solution of (1) and (2).
    Type: Grant
    Filed: November 12, 1973
    Date of Patent: June 1, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Richard S. Fisch, Norman Newman