Patents Represented by Attorney James C. Simmon
  • Patent number: 5276084
    Abstract: A pressure sensitive adhesive composition comprising an aqueous emulsion of a copolymer consisting essentially of(a) 10-40 wt % vinyl acetate,(b) 5-30 wt % ethylene,(c) 5-50 wt % alkyl acrylate,(d) 5-40 wt % dialkyl maleate or fumarate,(e) 1-5 wt % hydroxyalkyl (meth)acrylate,(f) 0.1-1 wt % (meth)acrylamide, and(g) 1-5 wt % alpha,beta ethylenically unsaturated carboxylic acid.
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: January 4, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Tze-Chiang Cheng, Chung-Ling Mao
  • Patent number: 5275701
    Abstract: A process for the purification and concentration of sulfuric acid contained with nitric acid by-products and organic components pursuant to the mixed acid nitration of aromatics.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: January 4, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William J. Mazzafro, Stephen I. Clarke, Philip N. Taylor
  • Patent number: 5273775
    Abstract: An improved method is provided for depositing a thin copper aluminum alloy film on a patterned silicon substrate. A copper base layer conforming to the existing pattern is initially formed on the surface of the substrate, followed by contact with vapors of an aminealane compound, which causes aluminum to be selectively deposited on the copper base layer portion of the substrate. Preferably, copper is applied to a diffusion barrier surface such as tungsten using chemical vapor deposition from a complex of copper (I) perfluoroalkyl-.beta.-diketonate and an olefin or silylolefin. The entire process of developing an alloy film can be carried out without exceeding 200.degree. C.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: December 28, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Paul N. Dyer, Stephen M. Fine, John A. T. Norman
  • Patent number: 5272213
    Abstract: This invention pertains to scorch retardant systems for peroxide curable elastomers. Polyunsaturated monomers copolymerizable with the elastomer in the presence of peroxides are mixed with hydroquinone and sulfenamides and incorporated into elastomer formulations. The formulations are milled and cured. Excellent Mooney scorch times and hardness values, as well as other physical properties are obtained.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: December 21, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Eric Knowles, David A. Cornforth, Francis M. Carney
  • Patent number: 5271424
    Abstract: A poly(vinylamine) which is preferably a poly(vinylamine) hydrochloride is an effective drag reducing agent in aqueous fluids under turbulent flow conditions. Apparently, because of its relatively low molecular weight, preferably in the range of about 5.times.10.sup.5 to 2.times.10.sup.6, this poly(vinylamine) is quite stable and maintains its drag reducing effectiveness over an extended period of usage, demonstrating superior stability to commercial polymers known as effective drag reducing agents. Effectiveness is demonstrated for both tapwater and seawater and the invention can be practiced with respect to fluids flowing through conduits or drag reduction for vessels passing through a body of water.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: December 21, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Thomas P. McAndrew
  • Patent number: 5270379
    Abstract: Fluid coating materials such as paints, ink pastes, personal care creams and the like having a water-base are thickened with an associative thickener which is a vinylamine polymer having a weight average molecular weight above 10.sup.5 and which has been modified by reaction with at least 0.2 mer percent of a linear monoaldehyde having 8 to 30 carbon atoms. A hydrolyzed polymer of N-vinylformamide which has been hydrophobically modified with an aldehyde such as dodecaldehyde, exhibits associative thickening characteristics and is useful in thickening water-based formulations.
    Type: Grant
    Filed: August 31, 1992
    Date of Patent: December 14, 1993
    Assignee: Air Products and Chemcials, Inc.
    Inventors: Thomas P. McAndrew, Andrew F. Nordquist, Robert K. Pinschmidt, Jr., Donald P. Eichelberger
  • Patent number: 5269822
    Abstract: The invention is a process for recovering oxygen from an oxygen-containing gaseous mixture containing one or more components selected from water, carbon dioxide or a volatile hydrocarbon which process utilizes ion transport membranes comprising a multicomponent metallic oxide containing barium. The process utilizes a temperature regime which overcomes problems associated with degradation of barium-containing multicomponent oxides caused by carbon dioxide.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: December 14, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Michael F. Carolan, Paul N. Dyer, Stephen M. Fine, James M. LaBar, Sr., Robert M. Thorogood
  • Patent number: 5267449
    Abstract: A method and system for cooling air to cryogenic temperatures [e.g., below - 100.degree. F. (- 730.degree. C.)] for use as a refrigerant medium for direct contact cooling of articles such as foodstuffs for fast freezing.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: December 7, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Edward F. Kiczek, Joseph M. Petrowski
  • Patent number: 5268023
    Abstract: Low silica X (LSX) zeolites having a framework Si/Al ratio equal to 1.0 with lithium exchange levels greater than a threshold level of 70% exhibit unexpectedly higher capacity for nitrogen adsorption compared to LSX-zeolite with lower lithium exchange levels. These materials provide high performance adsorbents for PSA air separation processes at a lower cost for the adsorbent because of the lower threshold lithium exchange levels compared to highly exchanged lithium X-zeolite known in the prior art.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: December 7, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: John F. Kirner
  • Patent number: 5267894
    Abstract: A vent termination assembly for a vertical pipe, stack or tube including a hinged flapper to normally close the end of said vent termination assembly and at least one downwardly sloping normally open to the atmosphere side pipe bevelled to discharge generally upward. The flapper contains energy adsorbing side beams to reduce velocity of the flapper during opening.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: December 7, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Thomas W. Schuck
  • Patent number: 5267490
    Abstract: Sampling device removably mounted proximate the discharge opening in an immersion freezer to collect samples of frozen product as they exit the immersion freezer conveyor and are deposited into a second freezing or equilibrating device.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: December 7, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Roger A. Howells
  • Patent number: 5266102
    Abstract: The invention is a process for selectively adsorbing nitrogen from a gas mixture which comprises contacting the gas mixture with an adsorbent that has a moderate nitrogen capacity and a high selectivity for nitrogen over the other components in the mixture. With respect to air separation, improved adsorbents have low O.sub.2 capacity with N.sub.2 capacity at roughly the same level as current adsorbents such as CaA. O.sub.2 VSA computer process simulations have shown the unexpected result that for materials with the same binary isothermal working selectivity, those with lower isothermal nitrogen working capacity are superior O.sub.2 VSA adsorbents, provided that they have a nitrogen working capacity of at least about 0.3 mmol/g.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: November 30, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Thomas R. Gaffney, John F. Kirner, Ravi Kumar, Robin J. Maliszewskyj, William P. Schmidt
  • Patent number: 5264467
    Abstract: An aqueous contact adhesive composition consisting essentially ofa) an aqueous emulsion containing an adhesive polymer,b) 0-50 wt % plasticizer, based on polymer solids,c) 0.5-10 wt % thermoplastic hollow microspheres, based on polymer solids, andd) 0-4.5 wt % polyethylenimine, based on polymer solids,the adhesive composition demonstrating less than one pound per linear inch adhesion to stainless steel by PSTC-1 method.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: November 23, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Frank V. DiStefano
  • Patent number: 5264501
    Abstract: This invention pertains to alkyl substituted bi(cyclohexylamine) and derivatives having a high trans,trans-isomer distribution. This isomer distribution represents a thermodynamic mixture of the isomers and provides for extended pot life and extended thermal properties in epoxy resins which are not seen with the kinetic isomer mixture. The bridged cyclohexylamine and derivatives are represented by the formula: ##STR1## wherein; R.sup.1 is hydrogen or C.sub.1-4 alkyl;R.sup.2 is C.sub.1-4 alkyl; andR.sup.3 is hydrogen or C.sub.1-4 alkylThe invention also relates to epoxy resins cured with the bridged bi(cyclohexylamines).
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: November 23, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Peter A. Lucas, Gamini A. Vedage, Jeremiah P. Casey
  • Patent number: 5264202
    Abstract: A process and apparatus are described wherein a convective heat transfer reformation of hydrocarbons is conducted with at least an initial prereforming section which decreases the fuel requirements for a given reformate production of hydrogen and carbon monoxide-containing product and/or reduces the size of the reformer.
    Type: Grant
    Filed: April 7, 1992
    Date of Patent: November 23, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Gregory D. Snyder
  • Patent number: 5262202
    Abstract: A method for heat treating a coated substrate is described wherein the outer coating on the substrate is comprised of a chemically vapor deposited mixture of tungsten and tungsten carbide. The coated substrate is heated to the deposition temperature or not substantially above the deposition temperature in a non-reactive atmosphere. The heat treating temperature is sufficient to confer a desired improvement in erosive and abrasive wear resistance in the outer coating but does not result in substantial degradation of the mechanical properties of the substrate or in formation of undesirable inter-metallic layers.
    Type: Grant
    Filed: June 20, 1989
    Date of Patent: November 16, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Diwakar Garg, Paul N. Dyer, Duane Dimos
  • Patent number: 5261932
    Abstract: The invention is a process for recovering oxygen from an oxygen-containing gaseous mixture containing one or more components selected from water, carbon dioxide or a volatile hydrocarbon which process utilizes ion transport membranes comprising a multicomponent metallic oxide containing strontium, calcium or magnesium. The process utilizes a temperature regime which overcomes problems associated with degradation of strontium-, calcium- and magnesium-containing multicomponent oxides caused by carbon dioxide.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: November 16, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Michael F. Carolan, Paul N. Dyer, James M. LaBar, Sr., Robert M. Thorogood
  • Patent number: 5260096
    Abstract: A structural article for high temperature applications comprises a body formed of at least partially consolidated, particulate silicon nitride, a conformal outer coating of silicon nitride or silicon carbide on the body, and a conformal intermediate layer of a silicon, oxygen and nitrogen-containing compound, i.e. silicon oxynitride, chemically bonded to both the body and the outer coating. The method for making such an article comprises providing a body formed of at least partially consolidated, particulate silicon nitride, oxidizing the surface of the body, removing silicon dioxide from the oxidized surface of the body; and chemically vapor depositing a conformal outer coating of silicon nitride or silicon carbide. The conformal outer coating provides a protective envelope around and assists in high temperature isostatic pressing of the body and hence permits one to use the structural article in isostatic pressing processes.
    Type: Grant
    Filed: June 11, 1987
    Date of Patent: November 9, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert A. Holzl, Yvonne R. DeKay, Richard E. Tressler, Vincent L. Magnotta, Paul N. Dyer
  • Patent number: 5260043
    Abstract: The invention describes a process for catalytically destroying NOx and carbon monoxide present in oxygen-containing combustion products wherein methane serves as a reductant. The process comprises combusting a fuel source in the presence of oxygen to form combustion products comprising nitrogen oxides, carbon monoxide and oxygen; introducing methane into the combustion products in an amount such that the total amount of methane to nitrogen oxides present, expressed as a ratio, by volume is greater than about 0.1; and reacting the nitrogen oxides, carbon monoxide, methane and oxygen in the presence of an exchanged crystalline zeolite under conditions sufficient to convert the nitrogen oxides and carbon monoxide to gaseous nitrogen, water and carbon oxides. Suitable catalysts include zeolites having a silicon to aluminum ratio of greater than or equal to about 2.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: November 9, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Yuejin Li, John N. Armor
  • Patent number: 5259893
    Abstract: A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals, sealing glass to metals, and sintering metal and ceramic powders in a continuous furnace from non-cryogenically produced nitrogen containing up to 5% residual oxygen is presented. The disclosed process involves mixing nitrogen gas containing residual oxygen with a predetermined amount of a hydrocarbon gas, feeding the gaseous mixture through a nonconventional device into the hot zone of a continuous heat treating furnace, converting residual oxygen to an acceptable form such as a mixture of moisture and carbon dioxide, a mixture of moisture, hydrogen, carbon monoxide, and carbon dioxide, or a mixture of carbon monoxide, moisture, and hydrogen, and using the resultant gaseous mixture for annealing and heat treating metals and alloys, brazing metals, sintering metal and ceramic powders, and sealing glass to metals.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: November 9, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Brian B. Bonner, Diwakar Garg, Donald P. Eichelberger