Patents Examined by Mary Lynn Fertig
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Patent number: 4940556Abstract: A long acting sustained release pharmaceutical composition for dihydropyridine calcium channel blockers wherein the calcium channel blocker and a pH-dependent binde are intimately admixed in essentially spherically shaped non-rugose particles of up to 1.2 mm in diameter.Type: GrantFiled: July 26, 1987Date of Patent: July 10, 1990Assignee: Syntex (U.S.A.) Inc.Inventors: Calum B. MacFarlane, Alastair B. Selkirk, Michael J. Dey
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Patent number: 4940741Abstract: A one-step process for simultaneously compressing and tempering fiberboard panel, which includes the step of applying to the panel prior to compression thereof an aqueous treating composition which comprises a polyvinyl acetate emulsion and optionally up to 40% of a hydrocarbon emulsion, up to 3% of a fluid, water-soluble organosilicone polymer, or up to 5% by weight of a starch crosslinking agent. The polyvinyl acetate emulsion is prepared in the presence of 6-10% by weight of a starch stabilizer selected from the group consisting of derivatized starches and/or converted starches and 0.5-1.5% of a surfactant. The preferred emulsions are polymerized in the presence of alkenyl succinate starches, most preferably octenyl succinate waxy maize starches.Type: GrantFiled: June 17, 1988Date of Patent: July 10, 1990Assignee: National Starch and Chemical Investment Holding CorporationInventors: Dennis R. De Wacker, Leon Rosenberg
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Patent number: 4937020Abstract: The polymer granular melt (1) is whirled out of a rotating nozzle head (6) through a plurality of exit holes (24) with fibre formation (32) and the fibres formed (9) are deposited on a collecting surface (12) in web form (15). This polymer melt is introduced into the nozzle head (6) under a preliminary pressure of 1 bar to 200 bar, preferably 1 bar to 50 bar. Furthermore, the fibres (32) are deflected by a high-speed gas stream (7, 8) in a radial direction at a radial distance of 10 mm to 200 mm from the exit holes (24) and, in the course of being deflected, are simultaneously drawn and stretched. The melt streams (32) exiting from the exit holes (24) can be additionally drawn by gas streams (26, 34) exiting in the vicinity of the exit holes (24) at the nozzle head (6) with a predominantly radial component before coming under the influence of the axial deflecting gas stream (7, 8).Type: GrantFiled: January 3, 1989Date of Patent: June 26, 1990Assignee: Bayer AktiengesellschaftInventors: Wolfram Wagner, Peter R. Nyssen, Dirk Berkenhaus, Hans-Theo van Pey
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Patent number: 4937025Abstract: Methods and apparatus for making self-supporting bodies from particulate materials. The apparatus includes a mold with opposed first and second walls defining a particulate chamber therebetween. The second wall is advanceable and retractable toward and away from the first wall. A plurality of chamber reducers may be removably mounted over each of the walls. Thick-walled members can be incrementally built up by pressing successive batches of particulate material at low and high pressures respectively. The chamber reducers can be successively removed between such batches, or can be used to vary the mold for making bodies of different sizes. A long body can be built up in increments, using a shorter mold, by forming a first increment, displacing the increment lengthwise in the mold, adding another batch of particulate material in overlapping relation to the first body increment, and then pressing such other batch to form a second increment bonded to the first.Type: GrantFiled: September 30, 1987Date of Patent: June 26, 1990Assignee: Hydra CorporationInventors: Robert D. Foster, Frank G. Weeden
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Patent number: 4936897Abstract: A method for the manufacture of physically prepared slow-release fertilizer by coating fertilizer particles with at least one layer of a substantially water insoluble metal salt formed in-situ from an organic acid having between 6 and 30 carbon atoms and a metal oxide or carbonate. Optionally, the coating layer contains micronutrients and inert materials. In a preferred embodiment, an additional layer of paraffin is added on the coating of metal salt of organic acid. The method is applicable for most of the known fertilizers. The method enables to vary the rate of fertilizer release and the release period time according to specific requirements.Type: GrantFiled: December 17, 1987Date of Patent: June 26, 1990Assignee: Haifa Chemicals Ltd.Inventors: Grigori Pipko, Shalom Manor, Moshe Ziv
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Patent number: 4935173Abstract: A prilling apparatus and process for producing seed material for size enlargement processes such as a granulation process for bisphenol. The apparatus includes a fluidized bed system with a spray header therein for producing spray droplets of material in a gaseous stream such as nitrogen to form prills of less than about 1 mm diameter.Type: GrantFiled: December 23, 1988Date of Patent: June 19, 1990Assignee: The Dow Chemical CompanyInventors: A. Michael Huey, Arthur R. Shirley, Jr., Phillip A. Forsythe
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Patent number: 4935457Abstract: A composition and method for producing a fiberboard. The fiberboard is produced from a mixture of wood-containing material, a binder, a waterproofing agent and a liquid concentrate. The liquid concentrate contains boric acid or a derivative thereof, a water soluble compound which includes an alcohol and a water soluble amine-containing compound, and optionally water. The mixture is intermixed and subsequently pressed at a predetermined compacting pressure and a predetermined temperature.Type: GrantFiled: October 22, 1987Date of Patent: June 19, 1990Assignee: Deutsche-Solvay Werke GmbHInventors: Wolfgang Metzner, Eberhard Osterloff, Detlef Seepe
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Patent number: 4935182Abstract: A process for providing batches of a mouldable, fibre-reinforced thermoplastic material matched to a moulding to be produced and accompanied by heating, whereby a free-flowing initial product of fibers and thermoplastic material-containing binders is heated as a strand and a matched batch is separated from the strand and supplied to batch further processing.Type: GrantFiled: February 10, 1988Date of Patent: June 19, 1990Assignee: Menzolit GmbHInventors: Gerd Ehner, Manfred Ehlers, Rolf von Paumgartten
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Patent number: 4933139Abstract: A process for the production of at least a one kilogram block of Chevrel-phase Pb.sub.x Mo.sub.y S.sub.z, wherein x=0.9 to 1.2, y=6.0 to 6.4, and z=7 to 8, includes mixing thoroughly stoichiometric quantities of starting materials in powdered form. The starting materials are selected from elemental Pb, Mo and S, sulfides of elemental Pb and Mo, and mixtures thereof. The starting mixture is introduced into a metallic container and evacuated to a pressure to 10.sup.4 Pa or less. The evacuated container is subjected to hot isostatic pressing at a constant pressure selected from a pressure ranging from 100 to 300 MPa, at a heating rate ranging from 10.degree. to 100.degree. C./hr., at a final pressing temperature ranging from 800.degree. to 1200.degree. C., and for a pressing period ranging from 10 to 100 hours, whereby the starting materials react to form the block of Chevrel-phase Pb.sub.x Mo.sub.y S.sub.z. The block is cooled at a cooling rate ranging from 50.degree. to 500.degree. C./hr.Type: GrantFiled: September 1, 1987Date of Patent: June 12, 1990Assignee: Kernforschungszentrum Karlsruhe GmbHInventors: Rene Flukiger, Wilfried Goldacker
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Patent number: 4933122Abstract: Bead producing process and an apparatus in which sol having enzymes, plant tissues, etc. dispersed therein is dropped into a solidifying liquid through a perforated plate. The sol is fed from a sol supply tank to a position near of the outer periphery of the planet gear of a planetary gear mechanism which is disposed on the perforated plate. At this moment, the sol supply tank is raised at a given rate in proportion to a decrease in the liquid level thereof so that the liquid level of the sol in the sol supply tank may be kept constant with respect to the perforated plate.Type: GrantFiled: February 12, 1988Date of Patent: June 12, 1990Assignee: Kirin Beer Kabushiki KaishaInventors: Akira Suzuki, Yuji Sakamoto
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Patent number: 4931231Abstract: A method and apparatus for manufacturing discrete solid particles of hydrocarbonaceous material, such as asphaltenes, in relatively dustless form includes heating the hydrocarbonaceous material, solid at standard conditions of temperature and pressure, to maintain the hydrocarbonaceous material in liquid form, and flowing the liquid hydrocarbonaceous material by gravity as an elongated annular stream into a reservoir of cooling liquid, such as cooling water, to solidify and shatter the annular stream into discrete solid particles in relatively dustless form. The apparatus includes a hopper for collecting a mass of heated liquid hydrocarbonaceous material; a heating source for heating the hydrocarbonaceous material to maintain it in liquid form; and flow channels operatively connected to the hopper at an upper level of the liquid hydrocarbonaceous material for flowing the liquid hydrocarbonaceous material in an elongated annular stream through the flow channel and into the reservoir of cooling water.Type: GrantFiled: April 22, 1985Date of Patent: June 5, 1990Assignee: American Colloid CompanyInventor: Maynard Teppo
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Patent number: 4931243Abstract: Process and apparatus for spreading a chip web from a supply over a width corresponding to the web width on a substrate moving below the supply. Such spreading is accomplished according to a web height distribution specified in the web transversely to the direction of web travel. The apparatus includes a rake-like distribution device and a distribution chute arranged between the supply and the web laydown for the purpose of eliminating defects caused by delivery elements in the transverse distribution of the chip web. An arrangement of several rakes inclined toward one another functions to control the transverse chip distribution.Type: GrantFiled: May 6, 1988Date of Patent: June 5, 1990Assignee: Carl Schenck AGInventors: Walter Henschel, Manfred Riesner, Uwe Kunstmann
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Patent number: 4931230Abstract: Irradiated polypropylene articles of non-crystalline mesomorphous polypropylene and a method for preparing the articles are provided. The articles are irradiated with a sterilizing dosage of ionizing radiation. The irradiated articles such as films and blown microfiber webs are substantially undegraded after storage periods of as long as six months.Type: GrantFiled: January 24, 1989Date of Patent: June 5, 1990Assignee: Minnesota Mining and Manufacturing CompanyInventors: Dennis L. Krueger, Thomas I. Insley, Daniel E. Meyer, Richard J. Rolando
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Patent number: 4929400Abstract: Very small, individual polymeric microspheres with very precise size and a wide variation in monomer type and properties are produced by deploying a precisely formed liquid monomer droplet, suitably an acrylic compound such as hydroxyethyl methacrylate into a containerless environment. The droplet which assumes a spheroid shape is subjected to polymerizing radiation such as ultraviolet or gamma radiation as it travels through the environment. Polymeric microspheres having precise diameters varying no more than plus or minus 5 percent from an average size are recovered. Many types of fillers including magnetic fillers may be dispersed in the liquid droplet.Type: GrantFiled: April 28, 1986Date of Patent: May 29, 1990Assignee: California Institute of TechnologyInventors: Alan Rembaum, Won-Kyu Rhim, Michael T. Hyson, Manchium Chang
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Patent number: 4929402Abstract: A system for generating three-dimensional objects by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process.Type: GrantFiled: April 19, 1989Date of Patent: May 29, 1990Assignee: 3D Systems, Inc.Inventor: Charles W. Hull
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Patent number: 4927582Abstract: A distinctive apparatus for forming an absorbent body includes a forming chamber, and a fiber delivering mechanism for providing a flow of fibrous material within the forming chamber. A forming layer, which is located in the forming chamber and is movable therein, receives deposit of the fibrous material thereon. A conduit mechanism supplied a flow of dispersed bodies of high-absorbency material, which enter the forming chambers and intermix with the flow of fibrous material thereon. A regulating mechanism controls a velocity of the flow of high-absorbency material into the flow of fibrous material to thereby form a selected distribution of high-absorbency material within the fibrous material deposited onto the forming layer.Type: GrantFiled: March 17, 1988Date of Patent: May 22, 1990Assignee: Kimberly-Clark CorporationInventor: Robert E. Bryson
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Patent number: 4923656Abstract: The production of wood material particles into board or panels, such as chipboard, fiberboard, OSB panels, MDF panels and the like, involves coating the particles with a binder free of any hardener. The coated particles are deposited on a support surface in the form of a mat and then are compressed. While the particles are being compressed in a press, an acid or basic hardener in a gaseous phase or in a binary phase with a gaseous carrier agent, is introduced across and into the surface of the mat or directly into the interior mat. The compression of the mat can be performed either in a continuous double band press or a discontinuous single or multi-platen press. In a double band press, two press bands are arranged in opposed relation and the hardener is introduced into the mat in a wedge-shaped inlet zone between the press bands. The hardener flows through openings in the press band onto the surface of the mat.Type: GrantFiled: April 21, 1988Date of Patent: May 8, 1990Inventor: Kurt Held
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Patent number: 4923646Abstract: A method and apparatus for the formation of polymer fibrids. These fibrids are produced by the mixing of superheated water and melted polymer and by passing this mixture through a bank of capillary tubes. The mixture becomes elongated in the capillary tubes and exits those tubes through a nozzle into an expansion chamber where they form fibrids. The fibrids are cooled by the evaporation of liquid water after expansion.Type: GrantFiled: November 8, 1988Date of Patent: May 8, 1990Assignee: James River CorporationInventor: Homan B. Kinsley, Jr.
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Patent number: 4923649Abstract: A method of pelletizing polymer utilizing a liquid medium characterized in that the liquid medium boils at a temperature greater than the melting temperature of the polymer and is immiscible with the molten polymer so that (1) polymer can be heated in the liquid medium to a temperature that causes particulates to melt, (2) the melted polymer can be allowed to agglomerate and (3) the agglomerated polymer can be cooled in a liquid to form pellets.Type: GrantFiled: March 6, 1986Date of Patent: May 8, 1990Assignee: Phillips Petroleum CompanyInventors: Eric T. Hsieh, Gene H. C. Yeh, John R. Donaldson
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Patent number: 4921658Abstract: A process for preparing reinforced thermoset articles of manufacture from a lofted composite sheet employed as a skeleton or preform which is impregnated with a thermoset resin composition and cured. A reinforced thermoset article of manufacture prepared from a lofted composite impregnated with a thermoset resin composition and cured is also provided.Type: GrantFiled: November 9, 1987Date of Patent: May 1, 1990Assignee: The Dow Chemical CompanyInventors: Donald W. Pennington, Jane K. McLemore