Patents Represented by Attorney William B. Walker

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  • Chemical vapor deposition apparatus
    Patent number: 4545327
    Abstract: A chemical vapor deposition device having uniformly distributed heating means substantially surrounding an inner deposition reaction chamber for providing isothermal or precisely controlled gradient temperature conditions therein, the reaction chamber being surrounded by the walls of an outer vacuum chamber spaced therefrom.
    Type: Grant
    Filed: August 27, 1982
    Date of Patent: October 8, 1985
    Assignee: Anicon, Inc.
    Inventors: Bryant A. Campbell, Nicholas E. Miller
  • Chemical vapor deposition apparatus
    Patent number: 4539933
    Abstract: An improved chemical vapor deposition device having heating means substantially surrounding an inner deposition chamber for providing isothermal or precisely controlled gradient temperature conditions therein. The internal components of the chamber are quartz or similar radiant energy transparent material. Also included are special cooling means to protect thermally sensitive seals, structural configurations strengthening areas of glass components subjected to severe stress during operation, and specific designs permitting easy removal and replacement of all glass components exposed to deposition gas.
    Type: Grant
    Filed: August 31, 1983
    Date of Patent: September 10, 1985
    Assignee: Anicon, Inc.
    Inventors: Bryant A. Campbell, Dale R. DuBois, Ralph F. Manriquez, Nicholas E. Miller
  • Precision valve assembly
    Patent number: 4537387
    Abstract: A precision valve assembly for controlling the flow of fluids delivered to a patient has a valve element mounted on a flexible diaphragm. A controlled actuator displaces a portion of the diaphragm surface, flexing it, and by a leverage action, moves the valve closer to or away from the valve seat.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: August 27, 1985
    Assignee: Anatros Corporation
    Inventors: Hal C. Danby, Werner W. Ciupke
  • Parenteral solution delivery control system
    Patent number: 4533350
    Abstract: A parenteral solution delivery control system for housing a drip chamber and detecting drops falling therethrough. One or more light sources are employed to provide light beam transverse to the drip chamber axis and covering the cross-section of the drip chamber so that drops falling therethrough, even when the drip chamber is tilted, break a light beam. A retention bar is provided to maintain the drip chamber in proper position and to break a light beam when the drip chamber is in position, thereby preventing operation of the device when not properly assembled. A liquid level control monitor is configured to provide an energized signal when the area of the drip chamber occupied by liquid during normal operation is filled with air as a consequence of the liquid level falling to an abnormal level.
    Type: Grant
    Filed: May 10, 1983
    Date of Patent: August 6, 1985
    Assignee: Anatros Corporation
    Inventors: Hal C. Danby, Carl Ritson
  • Fluorometirc enzyme inhibition immunoassay for measuring potency of allergen extracts
    Patent number: 4528267
    Abstract: An inhibition assay for measuring the potency of allergen extracts by incubating a mixture of allergen extract and reference allergen specific IgE in a buffered solution with an insoluble support to which reference allergen is adhered. The conjugated IgE adhering to the insoluble support is reacted with an enzyme labeled anti-IgE antibody and the enzyme label is contacted with a solution of a substrate which will yield a fluorescent product in the presence of the enzyme. The level of fluoresence in the solution is measured. The percentage of inhibition of the allergen specific IgE is determined from fluorescence levels measured for various extract concentrations.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: July 9, 1985
    Assignee: Axionics, Inc.
    Inventors: Emanuel Calenoff, Yuh-Geng Tsay, Ruth M. Jones, Scott, John R.
  • Substrate loading means for a chemical vapor deposition apparatus
    Patent number: 4524719
    Abstract: A controlled temperature deposition device comprising an inner reaction chamber having gas distribution means for introducing gas into inner chamber and removing gas therefrom and a vacuum chamber means surrounding the inner deposition chamber and spaced from the walls thereof for maintaining a medium vacuum therein. Associated with the deposition device is a substrate loading and unloading fork which transfers substrates such as wafer boats from outside the device to a position in the inner deposition chamber and removes them from the inner deposition chamber following deposition.
    Type: Grant
    Filed: September 6, 1983
    Date of Patent: June 25, 1985
    Assignee: Anicon, Inc.
    Inventors: Bryant A. Campbell, Dale R. DuBois, Ralph F. Manriquez, Nicholas E. Miller
  • Concrete permeability testing device and method
    Patent number: 4524604
    Abstract: A concrete permeability testing core comprises a cylinder of polymeric foam enclosed within an elastomeric envelope under tension. When placed in a cylindrical concrete mold in an axially concentric orientation, it can be used to form a concrete test specimen with a cylindrical cavity. After the concrete is cured and the outer concrete mold is removed, the polymer foam can be collapsed by contacting it with solvent for the foam. The elastomeric envelope, being under tension, contracts to a smaller size, permitting easy removal from the concrete and leaving a nascent cavity surface.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: June 25, 1985
    Inventor: Gary L. Vondran
  • Chymopapain allergen and method
    Patent number: 4499065
    Abstract: A chymopapain derivative having the enzymatic activity reduced by at least 95% while retaining the original allergenic activity of at least 90% is suitable for skin testing to detect allergic hypersensitivity to chymopapain and for treating patients exhibiting allergic hypersensitivity to chymopapain. The enzymatic activity can be blocked by reacting thiol groups of the enzyme with and iodoacetic acid, bromoacetic acid, or a salt, ester or amide derivative thereof, under conditions which block the undesirable enzymatic activity while retaining the desired allergenic activity.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: February 12, 1985
    Assignee: Axonica, Inc.
    Inventors: Emanuel Calenoff, Ruth M. Jones, Yuh-Geng Tsay, Myron A. Beigler
  • Labeled antibodies and methods
    Patent number: 4490473
    Abstract: Sandwich immunoassays are provided wherein an anti-analyte antibody is coupled with a detector labeled antibody, the anti-analyte antibody being substituted with a N,N,N-trimethylammoniumphenyl group and the detector labeled antibody is an antibody specific to the N,N,N-trimethylammoniumphenyl group. The invention includes novel assays, antigens and antibodies.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: December 25, 1984
    Assignee: PanAb
    Inventor: Robert F. Brunhouse
  • Anorexigenic composition and method
    Patent number: 4489059
    Abstract: A water-soluble aqueous extract obtained from a 5123 Morris Hepatoma contains an anorexigenic agent having a molecular weight of from 3500 to 10,000 Daltons.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: December 18, 1984
    Inventors: Aldo A. Rossini, John P. Mordes, Susan E. Leeman, Robert E. Carraway, Susan E. Ruane
  • Precision valve assembly
    Patent number: 4477054
    Abstract: A precision valve assembly for controlling flow of fluids to a patient having a valve element mounted on a diaphragm. At least one ball positioned in a spiral track, when moved toward the center by relative rotation of the spiral track and an opposed longitudinal track, brings a valve and valve seat together to restrict fluid flow therethrough.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: October 16, 1984
    Assignee: Anatros Corporation
    Inventors: Hal C. Danby, Werner W. Ciupke
  • Insecticidal stick applicator and method
    Patent number: 4473582
    Abstract: An insecticidal package for applying a thin film of water-insoluble insecticide to a household surface including a container and insecticidal stick. The stick comprises from 0.25 to 15 weight percent insecticide, from 10 to 65 weight percent of a fatty alkyl monoether of propylene glycol, from 30 to 75 weight percent of monoethanolamide of fatty acid and optional quantities of liquid lubricity agent compatible therewith, the total liquid content not exceeding 65 weight percent.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: September 25, 1984
    Assignee: Zoecon Corporation
    Inventor: C. Lawrence Greene
  • Substituted acid chloride process
    Patent number: 4464307
    Abstract: The acid chlorides of N-substituted-2-aminocarboxylic acids are prepared by treating the carboxylic acids with phosgene in the presence of a catalytically effective amount of a water soluble tertiary amine, which acid chlorides are useful in the manufacture of insecticides.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: August 7, 1984
    Assignee: Zoecon Corporation
    Inventors: Ted A. Baer, Scott G. Broadbent
  • Anorexigenic composition and method
    Patent number: 4464356
    Abstract: A water-soluble aqueous extract obtained from a 5123 Morris Hepatoma contains an anorexigenic agent having a molecular weight of from 3500 to 10,000 Daltons.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: August 7, 1984
    Inventors: John P. Mordes, Aldo A. Rossini
  • Fermentation process and apparatus
    Patent number: 4426450
    Abstract: A method for agitating and mixing a gas with a medium in a closed fermentation vessel comprising recirculating said medium through a venturi jet mixer whereby it is mixed with the gas under high shear conditions to form a mixture of gas saturated medium and a dispersion of small gas bubbles and projected the mixture in the fermentation vessel below the liquid surface level in a plume extending horizontally from the jet mixer, then rising vertically to the liquid surface.
    Type: Grant
    Filed: January 18, 1982
    Date of Patent: January 17, 1984
    Assignee: Fermentec Corporation
    Inventor: David M. Donofrio
  • Simulated rawhide product
    Patent number: 4419372
    Abstract: A chewable, digestible, high protein product for canine pets which has physical properties and appearance resembling rawhide is prepared by extruding a mixture of an oil seed protein, a polyol plasticizer, lecithin and water, and impacting the surface of the extrudate with a stream of particles until the leather-like appearance is obtained.
    Type: Grant
    Filed: March 19, 1982
    Date of Patent: December 6, 1983
    Assignee: Zoecon Corporation
    Inventors: C. Lawrence Greene, David C. Creech, Donald W. Kelley
  • Novel pesticidal formulation
    Patent number: 4372943
    Abstract: An oil-in-water pesticidal emulsion concentrate comprising .alpha.-cyano-3-phenoxybenzyl-2-(2-chloro-4-trifluoromethylphenylamino)-3- methylbutanoate, polyvinyl alcohol and optional amounts of surfactant and ethylene or propylene glycol having freeze-thaw stability, 50 degrees centigrade stability and water dispersability.
    Type: Grant
    Filed: November 30, 1981
    Date of Patent: February 8, 1983
    Assignee: Zoecon Corporation
    Inventors: Steven C. Papanu, Ralston Curtis
  • Dental burr
    Patent number: 4178689
    Abstract: This application describes a dental burr including a cutting surface having one or more grooves therein, each of the grooves being defined by a plane which encircles the cutting surface at a skewed angle with respect to the axis of rotation of the burr. Such groove(s) provide an oscillatory chip clearing action as the burr rotates to give edge cutting and fast chip clearance. The cutting surface has abrasive particles coated thereon.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: December 18, 1979
    Assignee: Star Dental Manufacturing Co., Inc.
    Inventor: John E. Nash
  • 1,2-Dihydro-3H-pyrrolo[1,2-a]pyrrole-1-nitriles
    Patent number: 4140698
    Abstract: 5-Substituted-1,2-dihydro-3H-pyrrolo[1,2-a]pyrrole-1-carboxylic acids of the formula ##STR1## wherein Y is a moiety selected from the group consisting of ##STR2## in which R is hydrogen, methyl, chloro or bromo, the R substitution being at the 3, 4 or 5 positions of the thiophene ring,R.sup.1 is hydrogen, a lower alkyl group having 1 to 4 carbon atoms, a lower alkoxy group having from 1 to 4 carbon atoms, chloro, fluoro or bromo, the R.sup.1 substitution being at the ortho, meta or para positions of the aroyl group, andR.sup.2 is hydrogen or a lower alkyl group having from 1 to 4 carbon atoms, are prepared, by hydrolysis, from their corresponding nitriles.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: February 20, 1979
    Assignee: Syntex (USA) Inc.
    Inventors: Albert R. Van Horn, Pasquale G. Gallegra
  • Dental pin
    Patent number: RE29817
    Abstract: A dental pin used in building a superstructure on a tooth having a substantial portion thereof that has been removed. The pin comprises a shaft having a flute at the lower end thereof. The remainder of the shaft is threaded. The flute taps a hole that has previously been drilled in the tooth, and the threads on the shaft are retained in the tapped hole. Thus, the shaft is self-tapping. The shaft also includes an integral handle which permits the rotating of the pin into the tooth. A plurality of the pins are inserted in the tooth in a non-parallel relationship, and a superstructure is built on exposed portions of the pins. A fracture point is formed on each pin in order to break the head off after the pin has been inserted.
    Type: Grant
    Filed: January 12, 1977
    Date of Patent: October 31, 1978
    Assignee: Star Dental Manufacturing Co. Inc.
    Inventors: Nathaniel H. Lieb, Richard A. Wallace