Patents Examined by Mary Lynn Fertig Theisen
  • Patent number: 4981518
    Abstract: A fire resistive and insulating bonded composite structure includes a binder made from a mixture of a weak acid and a powdered base metal oxide wherein the acid and metal fuse as a mixture under an exothermic reaction into the binder. A fibrous cellulose material is encapsulated within the binder and rendered non-flammable thereby. The subject invention further provides a method of making the bonded composite structure including the steps of mixing the weak acid and powdered base metal oxide, encapsulating the fibrous cellulose material within the binder and rendering the fibrous cellulose material non-flammable thereby, forming the slurry mixture into a predetermined form, and setting the formed mixture into a solid.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: January 1, 1991
    Inventor: Melvin H. Sachs
  • Patent number: 4976907
    Abstract: An improved roll and method for mixing, shearing and pelletizing materials utilizing a pair of conical-shaped rollers positioned adjacent to one another with one of the rollers having a plurality of perforations in its narrow end and the other of the rollers, in one embodiment, heated, with material positioned in the nip at the wider end of the rollers moving during operation of the rollers to the narrow end where the material is forced through the perforations and cutt off inside the roller forming pellets.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: December 11, 1990
    Inventor: Gregory R. Brotz
  • Patent number: 4973575
    Abstract: A superconductor comprised of a polycrystalline metal oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-X (where 0<.times.<0.5) is capable of accommodating very large current densities. By aligning the two-dimensional Cu--O layers which carry the current in the superconducting state in the a- and b-directions, i.e., within the basal plane, a high degree of crystalline axes alignment is provided between adjacent grains permitting the metal oxide material to accommodate high current densities. The orthorhombic crystalline particles have a tendency to lie down on one of the longer sides, i.e., on the a- or b-direction. Aligning the crystals in this orientation is accomplished by mechanical working of the material such as by extrusion, tape casting or slip casting, provided a single crystal powder is used as a starting material, to provide a highly oriented, e.g., approximately 90% of the crystal particles have a common orientation, superconducting matrix capable of supporting large current densities.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: November 27, 1990
    Assignee: Arch Development Corporation
    Inventor: Donald W. Capone
  • Patent number: 4971748
    Abstract: A three-dimensionally shaped aromatic imide polymer sheet article is produced by a method comprising the steps of shaping an aromatic imide polymer sheet having a second order transition temperature of 250.degree. C. to 400.degree. C. and an ultimate elongation of 120% or more at 100.degree. C., by press-stretching at least a portion of the sheet at a temperature of 100.degree. C. or more, but not exceeding a temperature of 100.degree. C. higher than the second order transition temperature of the sheet, into a desired three-dimensional convex or concave form protruding from the sheet, heat-setting the resultant shaped sheet article in its shaped form at a temperature equal to or higher than the second order transition temperature of the sheet, and then cooling the heat-set sheet article to a desired low temperature.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: November 20, 1990
    Assignee: UBE Industries, Ltd.
    Inventors: Takahiko Sado, Hiroaki Mori
  • Patent number: 4968662
    Abstract: A method of the production of the ceramic superconductor filament comprisesa step including mixing raw materials of ceramic superconductor, subsequently shaping the mixed ceramic superconductor into a ceramic superconductor body of a predetermined shape and preliminarily sintering thereof and further subsequently crushing the sintered ceramic superconductor body into ceramic superconductor powder;a step of filling the ceramic superconductor powder in a glass tube;a step of heating the glass tube including ceramic superconductor powder so that the ceramic superconductor powder is molten; anda step of spinning the glass tube including the ceramic superconductor materialwhereby a ceramic super conductor covered with the glass material can be obtained.
    Type: Grant
    Filed: April 14, 1988
    Date of Patent: November 6, 1990
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Akira Urano, Kenichi Takahashi, Kazuya Ohmatsu, Masashi Onishi
  • Patent number: 4960553
    Abstract: An article having non-planar portions, such as a material handling pallet, including a substantially flat deck member and a plurality of hollow leg members projecting integrally from the deck member, is molded as a one-piece unit from a loosely-felted mat formed from a mixture of resinous particle board binder and flake-like wood particles. The leg members are preformed in a separate preform mold or the article forming mold and the mat is deposited on the female die over mold cavities containing the preforms. When the article forming mold is closed, the mat and preforms are compressed into substantially the desired shape and size under temperature and pressure conditions which bond the wood particles of the mat and the preforms together to form a unitary structure.
    Type: Grant
    Filed: February 12, 1990
    Date of Patent: October 2, 1990
    Assignees: Board of Control Michigan Technological University, Weyerhaeuser Co.
    Inventors: Gordon R. DeBruine, Bruce A. Haataja, L. Bogue Sandberg
  • Patent number: 4960548
    Abstract: A method of manufacturing a molded wooden product includes the steps of: preparing a ligneous molding material by adding a binder essentially consisting of a synthetic resin and the like to wood fibers; adjusting the weight of the molding material in a fibrous state or in a state of being aggregated into a predetermined configuration; directly supplying the molding material to a shaping mold; shaping the outer periphery of the molding material by moving the shaping mold toward the center in conformity with the final external shape of a molded product; and hot compression molding the molding material, thereby obtaining a molded wooden product of a predetermined configuration.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: October 2, 1990
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Sadao Ikeda, Yoshio Taguchi
  • Patent number: 4956128
    Abstract: Perfectly spherical, smooth and uniform microcapsules, which may contain living cells, are produced having a diameter less than 700 .mu.m by employing an electrostatic droplet generator. A droplet is suspended from a pointed source, such as a needle, and is charged with high static voltage. A collecting vessel or ring device is charged with opposing polarity and attracts the droplet. When a voltage potential threshold is passed, the droplet moves from the source to the collecting vessel. The voltage pulse height, pulse frequency and length, and extrusion rate of the droplets are adjustable so that predetermined sizes of droplets may be repeatedly generated and collected.
    Type: Grant
    Filed: November 13, 1986
    Date of Patent: September 11, 1990
    Assignee: Connaught Laboratories Limited
    Inventors: Martin Hommel, Anthony M. Sun, Mattheus F. A. Goosen