Patents Represented by Attorney Eugene Lieberstein

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  • Pyrolytic boron nitride heating unit
    Patent number: 5343022
    Abstract: A pyrolytic boron nitride heating unit composed of a dielectric base of boron nitride and a pyrolytic graphite heating element having contact ends for connection to an external power supply through a contact assembly comprising graphite posts connected to the contact ends with each post having a pyrolytic boron nitride coating and exposed attachment ends spaced a predetermined minimum distance from the contact ends for connection to the power supply. The contact assembly preferably also includes flexible graphite washers for connection between the contact ends and the graphite posts.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: August 30, 1994
    Assignee: Advanced Ceramics Corporation
    Inventors: Michael H. Gilbert, Sr., Timothy J. Hejl
  • Ceramic composite and method
    Patent number: 5336454
    Abstract: A ceramic composition and method for making ceramic composites having superior erosion and corrosion resistance to molten metal. The composite includes mullite, aluminum nitride and boron nitride in combination. The composite may be hot pressed or cold formed and pressureless sintered into a desired shape.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: August 9, 1994
    Assignee: Advanced Ceramics Corporation
    Inventor: Lionel C. Montgomery
  • Process for forming a crack-free boron nitride coating on a carbon structure
    Patent number: 5275844
    Abstract: A process for producing a crack-free coating of pyrolytic boron nitride on a carbon structure in which the coating is formed in a controlled atmosphere containing vapors of ammonia and gaseous boron halide within a temperature range of between 1500.degree. C. to 1700.degree. C.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: January 4, 1994
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Arthur W. Moore
  • Metal composite and method for filling a dental cavity in the preparation of a dental restoration
    Patent number: 5272184
    Abstract: A metal composite and method for filling a dental cavity independent of cavity size. The dental metal composite comprises high-fusing temperature particles, low-fusing temperature particles, and a wax binder, and is inserted into the cavity to replicate the cavity, removed for heat treatment, densified, and reinserted to complete the filling operation.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: December 21, 1993
    Inventors: Itzhak Shoher, Aharon E. Whiteman
  • Stripping solution for stripping compounds of titanium from base metals
    Patent number: 5232619
    Abstract: An aqueous stripping solution and method for selectively removing a titanium compound from a base metal. The aqueous solution contains a source of hydrogen peroxide, an alkali source of hydroxyl ions and an acid with the components in a concentration such that the pH of the solution is above 8.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: August 3, 1993
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Jiinjen A. Sue
  • Method for testing the hardness of a dental composite material
    Patent number: 5220827
    Abstract: A device and method for testing the hardness of a dental restorative material before use. The device is a preformed body with an opening in which uncured restorative material is placed for curing under a standard source of light energy for a normal exposure period. The body has a known hardness which is compared against the hardness of the material on the distal side of the body relative to the source of light.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: June 22, 1993
    Inventor: Joshua Friedman
  • Apparatus for coating an iron based metal with a liquid protective metal and method
    Patent number: 5073415
    Abstract: In processes in which protective metal coating materials are applied to iron-based substrates in the form of liquid films which are then solidified by cooling, the metal coating can be contacted with a roll such as a tower roll, conveyor roll or guide roll, while the coating material is capable of transfer, by the use of a roll having an exterior ceramic barrier or surface having a thickness of at least about 20 microns whereby the surface of the coated substrate is not unduly adversely affected.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: December 17, 1991
    Assignee: Union Carbide Coatings Service Technology Corporation
    Inventors: Thomas A. Taylor, Robert C. Tucker, Jr.
  • Composites of in-situ exfoliated graphite
    Patent number: 4946892
    Abstract: Composites of graphite dispersed in a solid matrix of a polymeric resin, wherein intercalated graphite flakes are mixed with a liquid polymeric resin and exfoliated in-situ in the liquid resin during the curing of the resin before complete solidifcation of the resin.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: August 7, 1990
    Assignee: UCAR Carbon Technology Corporation
    Inventor: Deborah D. L. Chung
  • Cordierite composition and method of production
    Patent number: 4946976
    Abstract: A Group IIA metal-Group IIIA metal-silicon substantially homogeneous liquid alkoxide is prepared from a reaction mixture of a Group IIA metal, a Group IIIA metal, a silicon tetraalkoxide, and a liquid defined by the formula ROR' where R is an alkyl group and R' is hydrogen or an alkyl group. The alkoxide can then be hydrolyzed, azeotropically distilled, dried, milled, and calcined to produce a ceramic powder. Advantageously, the ceramic powder can be compacted and sintered at relatively low temperatures which enable it to be used in electrical applications where high sintering temperatures would be deleterious.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: August 7, 1990
    Assignee: Union Carbide Corporation
    Inventors: John F. Terbot, Richard F. Hill
  • Apparatus for controlled irradiation
    Patent number: 4924070
    Abstract: Apparatus for supplying light and heat of variable intensity to a photocurable dental material. The apparatus includes a source of light, a reflector, a filter assembly, a light guide and an electrical fan. The heat is generated from the light source and is controllably directed by an arrangement of louvers with a manually adjustable lever through a passageway surrounding the light guide to the operatory site.
    Type: Grant
    Filed: August 10, 1989
    Date of Patent: May 8, 1990
    Inventor: Joshua Friedman
  • Refractory composites of alumina and boron nitride
    Patent number: 4904625
    Abstract: Composites of alumina and boron nitride having superior thermal shock resistance, and particularly suitable for use in hot metal applications such as break rings in horizontal continuous casters.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: February 27, 1990
    Assignee: Union Carbide Corporation
    Inventor: Gregory W. Shaffer
  • Gas flowmeter and soap bubble generator
    Patent number: 4762004
    Abstract: A gas flow measuring device comprising a flowtube, a soap bubble generator for generating a film of soap, a manually adjustable member for controlling the transfer of the soap film to the flowtube and a set of detectors spaced apart along the flowtube for measuring the time displacement of the soap bubble between the spaced positions of the detectors. The manually adjustable member is preferably a hoop surrounding the flowtube. A soap bubble is formed by immersing the hoop into the soap solution and withdrawing it. A soap film is transferred to the flowtube by raising the hoop to the mouth of the flowtube. In a second embodiment, a sleeve with slots surrounds a flowtube with slots. The sleeve is rotated into alignment with the flowtube to transfer a soap film.
    Type: Grant
    Filed: September 25, 1986
    Date of Patent: August 9, 1988
    Assignee: Gilian Instrument Corp.
    Inventors: Hill S. Lalin, William T. Fleming, Jr., Jorge E. Bermudez
  • Diagnostic method for analyzing and monitoring the process parameters in the operation of reciprocating equipment
    Patent number: 4734869
    Abstract: The method of the present invention utilizes a microcomputer in combination with a CRT and a multiplicity of transducers for monitoring process parameters in the operation of a reciprocating device having a linear stroke. A profile of the process parameters including pressure and velocity are generated as a function of stroke length and time and are stored in a non-volatile memory and graphically displayed on the CRT as master traces for comparison with current data profiles. The velocity is calculated by dividing distance transversed with time or by use of a velocity position transducer.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: March 29, 1988
    Inventor: John Mickowski
  • Total isomerization process and apparatus
    Patent number: 4709117
    Abstract: Disclosed are a process and apparatus for virtually complete isomerization of normal paraffin hydrocarbons which reduces recycle rates and enables operation of reactors and adsorbers at more favorable conditions and otherwise improve operating efficiencies based on constant quantities of adsorbents and catalysts. Also, and according to a preferred embodiment, a process and apparatus are provided for utilizing reformer offgas as a hydrogen makeup in such a process wherein the offgas is first purified by a pressure swing adsorption apparatus. Reactor and adsorber pressures and recycle rates can be lowered due to higher concentration of hydrogen in the recycle stream and higher reactant concentrations in the reactor. Recycle capital and operating costs are greatly reduced.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: November 24, 1987
    Assignee: Union Carbide Corporation
    Inventor: Robert L. Gray, Jr.
  • Isomerization process and apparatus
    Patent number: 4709116
    Abstract: The octane of a hydrocarbon feed is upgraded to make it suitable for use as a base stock for blending gasoline. An adsorber-lead system first removes non-normals from the feed and then subjects the normals to an isomerization reaction. The non-normals are then combined with at least a portion, preferably at least 50%, of the isomerization hydrocarbon product to form a product with a research octane number at least two units, preferably at least six units, greater than that of the feed.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: November 24, 1987
    Assignee: Union Carbide Corporation
    Inventors: Andrew S. Zarchy, Warren K. Volles, Luke F. O'Keefe
  • Soap film gas flowmeter
    Patent number: 4691577
    Abstract: A soap film gas flowmeter comprising a hollow flow tube having opposite open ends through which a soap bubble is propelled with one open end extending into a first closed chamber housing the soap solution and the opposite open end extending into a second chamber. Inlet gas is fed into the first chamber, passed through the flowtube and discharged from the second chamber. A manually movable piston like member is provided for generating a soap bubble at the bottom open end of the flowtube. The flowtube has an opening in it for providing an open passageway for inlet gas to pass through the flowtube when the bottom open end of the flowtube is covered by the soap solution.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: September 8, 1987
    Inventors: Hill S. Lalin, Jorge E. Bermudez, William T. Fleming
  • Liquid chemical dispensing apparatus
    Patent number: 4646784
    Abstract: Apparatus for dispensing liquid chemicals such as photoresist from containers, in particular, from collapsible pouch-type containers.
    Type: Grant
    Filed: November 19, 1985
    Date of Patent: March 3, 1987
    Assignee: Union Carbide Corporation
    Inventor: Marc de Leeuwe
  • Unencapsulated chip capacitor
    Patent number: 4639836
    Abstract: An unencapsulated electrolytic capacitor comprising an anode body with a peripheral manganese dioxide layer, having a thin insulative oxide coating on a portion of the manganese dioxide layer to prevent short-circuiting of the capacitor.
    Type: Grant
    Filed: December 19, 1984
    Date of Patent: January 27, 1987
    Assignee: Union Carbide Corporation
    Inventor: Harris L. Crowley, Jr.
  • Plasma arc power supply and method
    Patent number: 4580029
    Abstract: A plasma arc system for plasma arc welding and cutting including a plasma arc torch in circuit with a constant current power supply comprising a transformer having a primary winding and at least one secondary winding with the primary winding connected to a source of alternating current and a bridge rectifier circuit connected across the secondary winding to provide a DC current output. A bank of capacitors is connected across the secondary winding of the transformer with its capacitive reactance matched to the inductive reactance of the transformer to establish a condition of resonance.
    Type: Grant
    Filed: October 27, 1983
    Date of Patent: April 1, 1986
    Assignee: Union Carbide Corporation
    Inventors: William W. Beaver, Robert C. Fernicola
  • Plasma torch safety device
    Patent number: 4580032
    Abstract: The plasma torch of the present invention includes safety control means which responds to the removal or partial removal of the torch heat shield from the torch body for interrupting the flow of plasma gas and a switch system responsive to the interruption of the flow of plasma gas for disengaging the power supply from the torch.
    Type: Grant
    Filed: December 27, 1984
    Date of Patent: April 1, 1986
    Assignee: Union Carbide Corporation
    Inventor: Donald W. Carkhuff