Patents Represented by Attorney R. Hain Swope
  • Patent number: 5886239
    Abstract: A method of preparing fluoromethyl 2,2,2-trifluoro-1-(trifluoromethyl)ethyl ether (sevoflurane) and structurally related monofluoromethyl ethers in which the monochloromethyl ether precursor thereof is reacted with a sterically hindered tertiary amine hydrofluoride salt.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: March 23, 1999
    Assignee: Baxter International Inc.
    Inventors: Linas V. Kudzma, Ralph A. Lessor, Leonid A. Rozov, Keith Ramig
  • Patent number: 5836166
    Abstract: The present invention provides a food freezing apparatus and method in which food is passed through an elongated tube in which it is subjected to both crust and atmospheric freezing before being removed for packing. The crust freezing is facilitated by spraying liquid cryogen onto the outside of the tube at an upstream portion thereof.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: November 17, 1998
    Assignee: The BOC Group plc
    Inventor: David G. Wardle
  • Patent number: 5814121
    Abstract: An oxygen-gas fuel burner (12) for use in a refractory burner block (20) of glass distribution and conditioning channels (14) for thermally treating glass (18). The oxygen-gas fuel burner (12) includes a gas fuel conduit (26) extending to a central fuel outlet (28); an oxygen conduit (30) including a plurality of passages (30a) circumferentially spaced about the fuel conduit (26) and converging radially to oxygen outlets (32) circumferentially spaced about and concentric with the central fuel outlet (28); and a burner housing (34) including an outer nozzle (38). The outer nozzle (38) surrounds the fuel outlet (28) and the oxygen outlets (32) to provide a burner tip chamber (40) for mixing and combustion of oxygen and gas fuel to produce a flame within the burner tip chamber and extending outward from the burner tip chamber.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: September 29, 1998
    Assignee: The BOC Group, Inc.
    Inventor: Ian D. Travis
  • Patent number: 5779826
    Abstract: The present invention is directed to a method for forming a heat treating atmosphere in which a nitrogen rich gas containing small amounts of oxygen is preheated. An oxygen-reactive gas, such as a hydrocarbon gas, is combined with the nitrogen rich gas and the mixture is reacted outside of the furnace at temperatures above which substantial sooting does not occur. The resulting heat treating atmosphere is then forwarded to the furnace for conducting the heat treating process.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: July 14, 1998
    Assignee: The BOC Group, Inc.
    Inventors: Harbhajan S. Nayar, John J. Dwyer, Jr., Edward Chang
  • Patent number: 5778687
    Abstract: An apparatus for controlling the temperature in a building for human or animal occupancy comprises a source of liquid breathable, life-supporting gas consisting of oxygen and nitrogen, dispensing means for dispensing a vaporized mist of the gas within said building. The dispensed mist, being at significantly lower than ambient temperature, acts to cool the atmosphere within the building much more rapidly and effectively than conventional systems.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: July 14, 1998
    Assignee: The BOC Group plc
    Inventor: Stephen N. Waldron
  • Patent number: 5775110
    Abstract: A method of controlling the temperature in an enclosure comprising providing means for dispersing a vaporized cryogenic life-supporting gas within the enclosure to supplement and/or replace a mechanical refrigeration system normally provided therein. The chilling capacity of such a cryogenic system is significantly greater than that available in any presently known mechanical system and hence enhanced overall operation may be achieved. Additionally, the fact that the cryogenic gas is breathable permits an operator to enter the enclosure without presenting any hazard thereto.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: July 7, 1998
    Assignee: The BOC Group plc
    Inventor: Stephen N. Waldron
  • Patent number: 5772731
    Abstract: A process of removing carbon dioxide from a liquor in a vessel comprises the step of continuously passing a portion of the liquor into a sidestream and introducing discrete bubbles of between 0.005 mm and 1.0 mm diameter of nitrogen rich gas into the liquor before returning it to the vessel in which the nitrogen acts to adsorb carbon dioxide from the liquor and is then expelled from the liquor as an off-gas. The process also includes introducing a gas to be dissolved in the liquor into the sidestream as discrete bubbles having a diameter of between 0.005 mm and 1.0 mm.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: June 30, 1998
    Assignee: The BOC Group plc
    Inventor: Stephen B. Harrison
  • Patent number: 5766477
    Abstract: A process for the treatment of a liquid reactive medium with a gas comprising dispersing the gas in a liquid in which the gas is sparingly soluble to form a dispersion thereof, said liquid being maintained at a pressure (P1) greater than the pressure (P2) of the liquid reactive medium and the amount of said gas dispersed therein being in excess of its saturation point in the liquid; and introducing the dispersion into the liquid reactive medium having a demand for the gas which is in excess of the amount of gas capable of being dissolved therein at the prevailing conditions in the treatment zone.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: June 16, 1998
    Assignee: African Oxygen Limited
    Inventors: Edmund Victor Owen John, George L. Kuhn
  • Patent number: 5765555
    Abstract: An apparatus for the ectopic treatment of a patient with oxygen comprises a circuit including a bath for receiving the patient, a container spaced from the bath and containing oxygenated liquid and a pump for circulating the oxygenated liquid between the container and the bath. Preferably, the bath is located in a hyperbaric chamber.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: June 16, 1998
    Assignee: The BOC Group plc
    Inventor: Michael E. Garrett
  • Patent number: 5762268
    Abstract: Simulation apparatus for displaying three-dimensional graphics including a device for emitting an aroma generating material in connection therewith and a dispensing apparatus for emitting the aroma generating material.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: June 9, 1998
    Assignee: The BOC Group plc
    Inventors: Evelyn Arthur Shervington, Raymond Cyril Burningham
  • Patent number: 5756012
    Abstract: An apparatus for dissolving a gas in a liquid employs means for determining the alpha factor of said liquid or a parameter related thereto and control means to control the pumping rate of liquid through the apparatus in response thereto thereby maintaining the gas to liquid flow volume fraction and hence the gas dissolution efficiency within desired limits.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: May 26, 1998
    Assignee: The BOC Group plc
    Inventors: Stuart Roy Lauder McGlashan, Stephen Bruce Harrison
  • Patent number: 5734012
    Abstract: This invention pertains to cyclic polypeptides having gastrointestinal motor stimulating activity which may be represented by formula (1): ##STR1## including optically active isomeric forms and the pharmaceutically acceptable acid addition salts thereof, wherein groups A and D are linked to from a cyclic structure; and R.sub.1 is lower alkyl; R.sub.2 is hydrogen or lower alkyl; R.sub.3 is hydrogen or lower alkyl; R.sub.4 is phenyl or substituted phenyl, wherein the phenyl group may be substituted with one or more substituents selected from the group consisting of halogen, hydroxy, and lower alkoxy; R.sub.5 is --OH or --NH.sub.2 ; A is selected from the group consisting of L-glutamic acid, L-aspartic acid, L-lysine, L-ornithine, and L-2,4-diaminobutyric acid; B is L-alanine or L-glutamine; C is L-arginine or D-arginine; D is selected from the group consisting of L-lysine, L-ornithine, L-2,4-diaminobutyric acid, L-glutamic acid, and L-aspartic acid; E is a direct bond between group D and group R.sub.
    Type: Grant
    Filed: May 16, 1996
    Date of Patent: March 31, 1998
    Assignee: Ohmeda Pharmaceutical Products Division Inc.
    Inventors: Ramalinga Dharanipragada, Mark J. Macielag, Jung Kim-Dettelback, James Florance
  • Patent number: 5727186
    Abstract: Simulation apparatus for displaying three-dimensional graphics including a device for emitting an aroma generating material in connection therewith and a dispensing apparatus for emitting the aroma generating material.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: March 10, 1998
    Assignee: The BOC Group plc
    Inventors: Evelyn Arthur Shervington, Raymond Cyril Burningham
  • Patent number: 5699790
    Abstract: A system and method for estimating the NO.sub.2 concentration in the gas provided to a patient. The therapy of using nitric oxide to threat the lungs of a patient includes administering that gas along with a gas containing oxygen. Since the mixing of NO and oxygen cause a reaction leading to the formation of NO.sub.2 and which is toxic, the method and system determine the concentration of oxygen in the oxygen containing gas, the concentration of NO in the NO containing gas and the residence time between the time those gasses are mixed together to the time that mixture is administered to the patient. Those values are then used, preferably in a microprocessor to access a look up table in the memory of the processor, to thereby provide an estimation of the NO.sub.2 concentration of the gas administered to the patient.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: December 23, 1997
    Assignee: Ohmeda Inc.
    Inventors: Duncan P. L. Bathe, Frederick J. Montgomery, Robin L. Roehl
  • Patent number: 5697228
    Abstract: A method of manufacturing a breathable, life-supporting cryogenic liquid mixture including the steps of: producing a stream of treated natural air having substantially all the carbon dioxide and moisture removed therefrom; admixing a quantity of mixing gas containing nitrogen in a proportion greater than natural air thereby to producing a product gas mixture having a desired oxygen/nitrogen ratio and liquefying this said mixture in a heat exchanger against a suitable chilling fluid.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: December 16, 1997
    Assignee: The BOC Group plc
    Inventor: Catharine S. Paige
  • Patent number: 5692381
    Abstract: A chiller for chilling a quantity of fluid in a vessel comprises an adsorbent for receiving and adsorbing under pressure a quantity of gas; sealing means for sealing adsorbed gas in said adsorbent and releasing means for releasing adsorbed gas from said adsorbent in a controlled manner such that the action of desorption causes a reduction in the temperature of the adsorbent and gas which acts to chill the fluid.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: December 2, 1997
    Assignee: The BOC Group plc
    Inventor: Michael E. Garrett
  • Patent number: 5692890
    Abstract: A combustion apparatus includes a moderator gas supply which is added to the fuel to be combusted by concurrent injection to form an intimate admixture as it enters the combustion chamber. Such intimate mixture facilitates a high degree of temperature control within the combustion zone of the flame itself, thereby protecting combustion components and at least reducing or eliminating the formation of thermal NO.sub.x.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: December 2, 1997
    Assignee: The BOC Group plc
    Inventor: Stephen R. Graville
  • Patent number: 5685459
    Abstract: A liquid dispenser for dispensing liquid cryogen comprises a vessel (10) and a valve/actuator arrangement (16, 18) the valve being positioned within the vessel and operable to obturate or uncover an outlet orifice (14). The actuator (18) being positioned wholly or substantially outside the vessel, but being able to generate a magnetic force within the vessel for moving a magnet on the valve so as to move the valve between open and closed positions.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: November 11, 1997
    Assignee: The BOC Group plc
    Inventor: David G. Wardle
  • Patent number: 5680964
    Abstract: A liquid cryogen dispenser 10 includes a consolidation structure 20 adjacent its outlet 14 for causing gas contained in the liquid to consolidate into bubbles of sufficient buoyancy to cause them to rise to the surface of the liquid rather than be drawn through the outlet 14 where they can disrupt the smooth flow of liquid cryogen therefrom.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: October 28, 1997
    Assignee: The BOC Group plc
    Inventor: David G. Wardle
  • Patent number: 5679905
    Abstract: A fluid measuring device for measuring fluid present in liquid and vapor phase having a phase separator 12, a device for measuring the flow of the liquid and optionally the vapor and a device for recombining the liquid and vapor phases after the flow rates are measured.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: October 21, 1997
    Assignee: The BOC Group plc
    Inventor: David Grant Wardle