Abstract: A method for engraving a series of consecutive cells in a solid surface, such as a liquid transfer surface, by impinging on the surface a pulsed laser beam in which the pulses of the laser beam are formed in a series of consecutive groups of two or more consecutive pulses and each of said groups form an individual cell in the solid surface. The article produced is also described.
Abstract: A duplex coating for substrates that comprises an undercoat of tungsten carbide-cobalt having a strain-to-fracture of greater than 4.3.times.10.sup.-3 inch per inch and a top coat of a ceramic material such as alumina in which the ratio of the thickness of the top coat to the undercoat is from 6:1 to 1:3.
Abstract: The invention relates to a liquid transfer article, such as a printing roll, having a laser-engraved coated surface comprised of wells adapted to receive a liquid and land areas adapted to be wiped free of any liquid prior to contacting a receiving surface so that only the liquid in the wells are transferred. The land areas of the coated surface have a density of greater than 95% theoretical and a roughness of less than 6 micro-inches R.sub.a to insure that any unwanted liquid on the land areas can be wiped clean prior to contacting a receiving surface. The invention also relates to a method for producing the liquid transfer article.
Abstract: A wear and erosion resistant coating for substrates having a non-nitrogen titanium-containing outer surface onto which a non-stoichiometric titanium nitride coating is deposited in which the nitrogen content in the titanium nitride coating is from 32.5 to 47 atomic weight percent.
Abstract: A solid polymer electrolyte for a solid state electrochemical cell comprises a complex of a solid polymer such as poly(ethene oxide) and an alkali metal salt such as LiClO.sub.4, which polymer is capable of forming donor: acceptor type bonds with alkali metal ions and is capable of conducting alkali metal ions, the complex being associated with a mixture of more than one 1,3-dioxolane-2-ones, for example ethylene carbonate and propylene carbonate, such that the electrolyte possesses satisfactory ambient temperature ionic conductivity (e.g. 10.sup.-3 to 10.sup.-4 ohm.sup.-1 cm.sup.-1) and a cell including the electrolyte substantially maintains its discharge capacity at ambient temperature after repeated charge/discharge cycling.
Abstract: A pyrolytic boron nitride boat having a cavity suitable for use in growing and doping semi-conductor crystals such as gallium arsenide and said cavity having a roughened surface formed of substantially uniform projected no nodules, disturbances, or ridges.
Abstract: A boron nitride crucible having a closed end, an open end, an internal surface and an external surface, and wherein at least a portion of the external surface, preferably proximate the open end of the crucible, has a duplex coating comprising an undercoat of pyrolytic graphite and a top coat of pyrolytic boron nitride. A process for making the boron nitride crucible is also disclosed.
Abstract: A method for engraving a series of consecutive cells in a solid surface, such as a liquid transfer surface, by impinging on the surface a pulsed laser beam in which the pulses of the laser beam are formed in a series of consecutive groups of two or more consecutive pulses and each of said groups form an individual cell in the solid surface. The article produced is also described.
Type:
Grant
Filed:
August 7, 1990
Date of Patent:
September 1, 1992
Assignee:
Union Carbide Coatings Service Technology Corporation
Abstract: An improved erosion resistant coating for a gas path component of a turbo machine which comprises the thermal spraying of a chromium carbide, such as Cr.sub.3 C.sub.2, and an age hardenable nickel base alloy, such as Inconel 718, onto the gas path component and then, preferably, heat treating the deposited coating to harden the coating.
Type:
Grant
Filed:
October 18, 1990
Date of Patent:
August 11, 1992
Assignee:
Union Carbide Coatings Service Technology Corporation
Inventors:
Marianne O. Price, John E. Jackson, Jean M. Quets
Abstract: A hot-pressed ceramic composite of mullite/yttria stabilized zirconia/boron nitride having good resistance to thermal shock and good erosion/corrosion resistance to molten alloys, and a method for producing said composite which comprises the blending of fused mullite with boron nitride.
Type:
Grant
Filed:
January 23, 1992
Date of Patent:
July 28, 1992
Assignee:
Union Carbide Coatings Service Technology Corporation
Abstract: A hot-pressed ceramic composite of mullite/yttria stabilized zirconia/boron nitride having good resistance to thermal shock and good erosion/corrosion resistance to molten alloys, and a method for producing said composite which comprises the blending of fused mullite with boron nitride.
Type:
Grant
Filed:
April 30, 1991
Date of Patent:
June 9, 1992
Assignee:
Union Carbide Coatings Service Technology Corporation
Abstract: A process for treating high sulfur petroleum coke to inhibit puffing is disclosed wherein particles of the petroleum coke are contacted with a compound containing an alkali or alkaline earth metal selected from the group consisting of sodium, potassium, calcium and magnesium, at an elevated temperature above that at which the alkali or alkaline earth metal compound begins to react with carbon, but below the temperature at which the coke particles would begin to puff in the absence of the compound. The coke particles are maintained at an elevated temperature for a sufficient period of time to permit the reaction to proceed and allow products of reaction to penetrate into the particles and form an alkali-or alkaline-earth-metal-containing deposit throughout the mass of the particles; and then cooling the so-treated coke particles.
Type:
Grant
Filed:
September 5, 1991
Date of Patent:
June 2, 1992
Assignee:
UCAR Carbon Technology Corporation
Inventors:
Thomas H. Orac, Herbert C. Quandt, David R. Ball
Abstract: A cover for a vessel handling heated substances, such as a furnace, in which the cover comprises an outer segment defining an opening in which a removable inner cover segment (delta) is seated and wherein said inner cover segment comprises spaced apart walls defining an enclosed space that contains coolant spray means adapted for spraying coolant onto the wall that is closest to the interior of the vessel.
Abstract: A process for treating high sulfur petroleum coke to inhibit puffing is disclosed wherein particles of the petroleum coke are contacted with a compound containing an alkali or alkaline earth metal selected from the group consisting of sodium, potassium, calcium and magnesium, at an elevated temperature above that at which the alkali or alkaline earth metal compound begins to react with carbon, but below the temperature at which the coke particles would begin to puff in the absence of the compound. The coke particles are maintained at the elevated temperature for a sufficient period of time to permit the reaction to proceed and allow products of reaction to penetrate into the particles and form an alkali-or alkaline-earth-metal-containing deposit throughout the mass of the particles; and then cooling the so-treated coke particles.
Type:
Grant
Filed:
December 10, 1990
Date of Patent:
May 5, 1992
Assignee:
Ucar Carbon Technology Corporation
Inventors:
Thomas H. Orac, Herbert C. Quandt, David R. Ball
Abstract: A constant current source power supply comprising a flat solid electrolyte battery and a transistor-resistor current assembly second in series with the battery to provide a constant current supply from the battery.
Type:
Grant
Filed:
November 26, 1990
Date of Patent:
April 7, 1992
Assignee:
Gould Inc.
Inventors:
Mary P. Rossoll, Alan J. Revilock, George W. Moutsios
Abstract: Process for producing activated carbon, preferably high surface area activated carbon, from inexpensive cellulosic precursors, such as paper, by pretreating the cellulosic precursor with an activating agent, such as phosphoric acid, followed by carbonization in an inert atmosphere at an elevated temperature to produce activated carbon. The activated carbon can be further activated to increase its surface area by heating it in an oxidizing atmosphere at an elevated temperature to yield activated carbon having a surface area of at least 100 m.sup.2 /g.
Type:
Grant
Filed:
July 20, 1990
Date of Patent:
April 7, 1992
Assignee:
UCAR Carbon Technology Corporation
Inventors:
Ronald A. Greinke, Irwin C. Lewis, David R. Ball
Abstract: A process for the simultaneous production of titanium diboride and boron nitride powders using a single reaction procedure in which the raw materials of the TiB.sub.2 reaction and the BN reaction are blended together and subjected to a synthesis process which yields synthesized TiB.sub.2 and BN powders.
Type:
Grant
Filed:
March 31, 1991
Date of Patent:
March 31, 1992
Assignee:
Union Carbide Coatings Service Technology Corporation
Abstract: The invention relates to a liquid transfer article, such as a printing roll, having a laser-engraved coated surface comprised of wells adapted to receive a liquid and land areas adapted to be wiped free of any liquid prior to contacting a receiving surface so that only the liquid in the wells are transferred. The land areas of the coated surface have a density of greater than 95% theoretical and a roughness of less than 6 micro-inches R.sub.a to insure that any unwanted liquid on the land areas can be wiped clean prior to contacting a receiving surface. The invention also relates to a method for producing the liquid transfer article.
Type:
Grant
Filed:
May 2, 1989
Date of Patent:
March 3, 1992
Assignee:
Union Carbide Coatings Service Technology Corporation
Abstract: A constant length laser device for use with laser generating means comprising a first moveable optical reflector carriage for deflecting a laser beam 180.degree. onto a spaced apart second moveable optical carriage which further deflects the laser beam 90.degree. onto a workpiece, such as a printing roll, to be laser treated and wherein the first and second carriages are synchronized to move in the same direction with the first carriage moving at a speed one half that of the second carriage so as to produce a constant length laser beam.
Type:
Grant
Filed:
September 18, 1990
Date of Patent:
February 18, 1992
Assignee:
Union Carbide Coatings Service Technology Corporation
Inventors:
Gerald H. Stephenson, Russell M. Morgan
Abstract: A pipe thread sealant paste composition comprising from about 30 to about 80 percent by weight of natural flake graphite particles of a size sufficient to pass through a 100 Tyler mesh sieve and a liquid carrier comprising a mixture of mineral oil and petrolatum, the paste composition preferably having a total ash content of no greater than about 1 percent by weight and containing leachable chlorides in amounts equal to or less than about 50 parts per million. The invention also relates to a method for preparing and applying the pipe thread sealant paste to pipe joints.