Patents Represented by Law Firm Alexander, Sell, Steldt & DeLaHunt
  • Patent number: 3987567
    Abstract: A laminated flexible copy section comprising a rectangular film-sheet composite maintainable on a metal signboard by flexible magnet strips secured along edges of the sheet. Tabs secured to the upper edge of the section permit the copy section to be readily peeled from the signboard.
    Type: Grant
    Filed: May 7, 1973
    Date of Patent: October 26, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert W. Fritts
  • Patent number: 3987227
    Abstract: A durably soil-resistant pile fabric, such as a carpet, is provided which comprises a plurality of organic fibers having thereon a normally solid coating comprising (a) a first phase of a water-insoluble fluoroaliphatic radical free urethane adduct having at least one major transition temperature higher than about 45.degree. C. and melting to a flowable liquid below about 200.degree. C. and (b) a second phase of waterinsoluble fluoroaliphatic radical containing urethane adduct having at least one major transition temperature higher than about 45.degree. C. and melting to a flowable liquid below about 200.degree. C.
    Type: Grant
    Filed: November 6, 1974
    Date of Patent: October 19, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William J. Schultz, Samuel Smith
  • Patent number: 3986581
    Abstract: Doughnut-shaped damping unit comprising a pair of ring-shaped rigid members adhered to either side of a ring-shaped viscoelastic layer. One of the rigid members is adapted to be fixed to the lowermost portion of a spherical storage tank and the other is adapted to be anchored to the earth. When an earth tremor produces lateral movement of the tank, the viscoelastic layer provides damping, tending to prevent the tank from breaking away from its framework.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: October 19, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Donald B. Caldwell
  • Patent number: 3987037
    Abstract: Chromophore-substituted vinyl-halomethyl-s-triazine compounds are provided capable of free-radical generation upon excitation with radiation having a wavelength of from about 330 to about 700 millimicrons.
    Type: Grant
    Filed: September 3, 1971
    Date of Patent: October 19, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James A. Bonham, Panayotis C. Petrellis
  • Patent number: 3987455
    Abstract: Microstrip antenna having one or more arrays of resonant dipole radiator elements. The radiator elements have an E coordinate dimension of approximately .lambda.o/2.sqroot. .epsilon..sub.r .mu..sub.r. Bridge elements directly and conductively join adjacent pairs of radiator elements to provide energy distribution and the desired phase relationship. The radiator elements and bridge elements are in a broad surface which is uniformly spaced from a ground element by a dielectric sheet.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: October 19, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Murray Olyphant, Jr.
  • Patent number: 3987221
    Abstract: A method for preparing nuclei for use in receptor sheets in the photographic silver salt diffusion transfer process, the method comprising preparing a controlled size suspension of metal salt particles and converting the particles, in suspension, to corresponding particles of free metal or metal sulfide.
    Type: Grant
    Filed: July 6, 1971
    Date of Patent: October 19, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Terence William Baldock
  • Patent number: 3985840
    Abstract: Microporosity is introduced into a membrane capable of retaining a liquid by (a) forming a single homogeneous liquid phase comprising a first material and a second material, at a temperature above the melting points of said materials, said first material being incompatible with said second material when said liquid phase is cooled to room temperature, the volume contraction ratio being at least about 1.2, and (b) permitting the liquid phase to cool to room temperature, whereby said first material separates out as a dispersed solid phase and creates micropores which extend completely through said membrane.
    Type: Grant
    Filed: December 20, 1973
    Date of Patent: October 12, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: David A. Hofacker
  • Patent number: 3985882
    Abstract: Certain substituted 6,7-dihydro-1-oxo-1H,5H-benzo[ij]-quinolizine-2-carboxylic acids and hydrazides, esters, amides and salts thereof, intermediates therefor, and a process for their preparation are described; the compounds are active as anti-microbial agents.
    Type: Grant
    Filed: January 22, 1975
    Date of Patent: October 12, 1976
    Assignee: Riker Laboratories, Inc.
    Inventor: John F. Gerster
  • Patent number: 3986205
    Abstract: A magnetic recording medium having at least two particle populations that may be either contained in a single layer of magnetic medium or a dual layer of magnetic medium. In a first embodiment one of the particle populations of the medium is formed of conventional magnetic recording particles and the other population is highly anisotropic. In a second embodiment both particle populations are highly anisotropic but they are aligned so that the easy axes of magnetization of the populations are at an angle to one another. Also disclosed is a machine readable magnetic recording document that employs the magnetic recording medium of the present invention, and an apparatus for reading such document and validating the same.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: October 12, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard E. Fayling
  • Patent number: 3985689
    Abstract: A black sorbent thermoset foam which has been prepared by the pyrolysis of a composition comprising at least one Lewis acid metallic salt and at least one aromatic nitrogen-containing compound having the general formula:X -- Ar -- Yin which Ar represents an aromatic nucleus on which X and Y are substituents directly attached to the nucleus, X represents a substituent having a negative Hammett sigma constant and attached to the aromatic nucleus by a nitrogen, oxygen or sulphur atom, and Y represents a substituent having a positive Hammett sigma constant and attached to the aromatic nucleus by a nitrogen atom, and substituents X and/or Y optionally forming part of a ring fused onto the aromatic nucleus,Is an effective sorbtive substance for polar molecules and materials.
    Type: Grant
    Filed: May 20, 1974
    Date of Patent: October 12, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Alan N. Ferguson
  • Patent number: 3985688
    Abstract: A water-bearing structure, such as a sewer, water line or aqueduct, is sealed to prevent or minimize the leakage of water into or from said structure by placing at the locus of said leakage a fluid sealing composition comprising a water-miscible mixture of isocyanate-terminated polyoxyethylene urethane prepolymers in a compatible, water-miscible solvent, and curing said prepolymer by reaction thereof with water to form a seal at said locus.
    Type: Grant
    Filed: January 28, 1974
    Date of Patent: October 12, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Steven R. Speech
  • Patent number: 3985753
    Abstract: Certain substituted 6,7-dihydro-7-hydroxy-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acids and salt and ester derivatives thereof are described. These compounds are useful antibacterial agents.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: October 12, 1976
    Assignee: Riker Laboratories, Inc.
    Inventors: Dietrich Schuppan, John F. Gerster, Charles M. Leir
  • Patent number: 3986206
    Abstract: A magnetic recording medium having uniaxially highly anisotropic particles with an easy axis intrinsic coercive force of less than 1900 oersteds. Also disclosed is a machine readable magnetically encoded document employing the medium of the present invention and an apparatus for reading such document and validating the same.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: October 12, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard E. Fayling
  • Patent number: 3983870
    Abstract: A body limb support comprising a limb encircling member comprising knitted thread wherein the outer parts of the knitted thread in a relaxed state on a substantial portion of the inner surface of the limb encircling member have attached thereto a nonadhesive, noncontinuous, relatively soft, elastomeric polymeric material with a high coefficient of friction to skin so as to provide a nonocclusive slip resistant surface capable of maintaining the support in place on the limb of the body.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: October 5, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John Henry Herbert, John Fred Vanderlouw
  • Patent number: 3984548
    Abstract: Anti-microbial agents which are 2,3-dihydro-3-substituted-7-oxo-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxy lic acids are prepared by condensation of benzoxazines with ethoxymethylene malonate esters followed by ring closure with poly phosphoric acid and hydrolysis of the resulting esters.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: October 5, 1976
    Assignee: Riker Laboratories, Inc.
    Inventor: John F. Gerster
  • Patent number: 3984357
    Abstract: Fluoroaliphaticsulfonyl substituted ethylenes, useful as catalysts in polymerization of monomers, e.g., epoxide, vinyl ether, and N-vinyl monomers, are prepared by condensation of precursor fluoroaliphaticsulfonyl methanes with aldehydes or N-formyl compounds.
    Type: Grant
    Filed: March 27, 1974
    Date of Patent: October 5, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 3982780
    Abstract: Body side molding for automotive vehicles comprising a plastic body formed with at least one broad channel which communicates with the bottom of the molding to enable its bottom surface to conform to curved surfaces without distorting the top of the molding. This permits the molding to be permanently adhered to the variety of contours presented by automotive vehicles.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: September 28, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Roger H. Keith
  • Patent number: 3983291
    Abstract: Dispersions of poly(urethane-urea) terminated by hydrolyzable or hydrolyzed silyl groups form self-supporting films and coatings on webs. Leather coated with one of these compositions has excellent wear-resistance.
    Type: Grant
    Filed: December 4, 1975
    Date of Patent: September 28, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Joe H-S Chang
  • Patent number: 3982822
    Abstract: Large area lens assembly, e.g., for an overhead projector, has glass stage bonded directly to plastic incremental lens to eliminate light-reflective interface and conserve space. Differential thermal expansion problems are overcome by critical selection of materials, dimensions and procedures. A unitary structure with multiple incremental lenses is made possible.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: September 28, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Terrence M. Conder, Donald J. Newman
  • Patent number: 3982536
    Abstract: Ballistic projectile containing an antigen and method for inoculating animals comprising the non-lethal, ballistic implantation of a projectile containing antigen totally within a living animal. Following implantation, the antigen is released in situ in the animal in response to the fluids and cells of the animal body.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: September 28, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gerald P. Krogseng, Fred R. Paul, Jr.