Paul D Tungatt

47723955, Sep 20, 1988

Mar 23, 1987

7/028827

Paul D. Tungatt - Middletown CT
Derek E. Tyler - Cheshire CT
Harvey P. Cheskis - North Haven CT

Olin Corporation - New Haven CT

B01D 3920

210506

The present invention relates to a technique for forming silicon carbide coated porous filters for use in filtering molten metal, especially copper and copper alloy melts. The technique comprises preparing a silicon carbide containing slurry having a viscosity in the range of about 1 to about 50, preferably from about 5 to about 30, centipoise and impregnating a rigid porous substrate material with the slurry. In a preferred embodiment, the slurry contains mono-aluminum phosphate as a binding agent, ethylene glycol as a wetting agent, powdered silicon carbide having a maximum settling rate of about 0. 1 mm. /min. and the balance essentially water. After draining of the excess slurry, the coating substrate material is heated to substantially prevent foaming of the coating during firing and fired to bond the silicon carbide coating to the substrate material.

46014608, Jul 22, 1986

Apr 29, 1985

6/728632

Derek E. Tyler - Cheshire CT
Harvey P. Cheskis - North Haven CT
Paul D. Tungatt - Middletown CT

Olin Corporation - New Haven CT

C21C 700

266216

A copper or copper alloy material having a reduced number of defects is formed by removing impurities from the material while in a molten state with a member having exposed silicon carbide particles. The member may be a bed filter formed from bed media having exposed silicon carbide particles, a porous body formed from a slurry containing silicon carbide, a porous body having at least one melt contacting surface coated with a silicon carbide material, and/or a lining having at least one melt contacting surface coated with a silicon carbide material.

45333882, Aug 6, 1985

Apr 11, 1984

6/599138

Derek E. Tyler - Cheshire CT
Harvey P. Cheskis - North Haven CT
Paul D. Tungatt - Middletown CT

Olin Corporation - New Haven CT

C22B 1500

75 76

A copper or copper alloy material having a reduced number of stringer defects is formed by removing iron-containing components from the material with a member having exposed silicon carbide particles while the material is in a molten state. The member may be a bed filter formed from bed media having exposed silicon carbide particles, a porous body formed from a slurry containing silicon carbide, a porous body having at least one melt contacting surface coated with a silicon carbide material, and/or a furnace or passageway lining having at least one melt contacting surface coated with a silicon carbide material.

47087404, Nov 24, 1987

Jan 14, 1985

6/691618

Paul D. Tungatt - Middletown CT
Derek E. Tyler - Cheshire CT
Harvey P. Cheskis - North Haven CT

Olin Corporation - New Haven CT

C22B 1500

75 76

The present invention relates to a technique for forming silicon carbide coated porous filters for use in filtering molten metal, especially copper and copper alloy melts. The technique comprises preparing a silicon carbide containing slurry having a viscosity in the range of about 1 to about 50, preferably from about 5 to about 30, centipoise and impregnating a rigid porous substrate material with the slurry. In a preferred embodiment, the slurry contains mono-aluminum phosphate as a binding agent, ethylene glycol as a wetting agent, powdered silicon carbide having a maximum settling rate of about 0. 1 mm. /min. and the balance essentially water. After draining of the excess slurry, the coated substrate material is heated to substantially prevent foaming of the coating during firing and fired to bond the silicon carbide coating to the substrate material.

49832190, Jan 8, 1991

Mar 23, 1987

7/028828

Paul D. Tungatt - Middletown CT
Derek E. Tyler - Cheshire CT
Harvey P. Cheskis - North Haven CT

Olin Corporation - New Haven CT

C09K 300

10628713

The present invention relates to a technique for forming silicon carbide coated porous filters for use in filtering molten metal, especially copper and copper alloy melts. The technique comprises preparing a silicon carbide containing slurry having a viscosity in the range of about 1 to about 50, preferably from about 5 to about 30, centipoise and impregnating a rigid porous substrate material with the slurry. In a preferred embodiment, the slurry contains mono-aluminum phosphate as a binding agent, ethylene glycol as a wetting agent, powdered silicon carbide having a maximum settling rate of about 0. 1 mm. /min. and the balance essentially water. After draining of the excess slurry, the coated substrate material is heated to substantially prevent foaming of the coating during firing and fired to bond the silicon carbide coating to the substrate material.

49728997, Nov 27, 1990

Jan 2, 1990

7/459603

Paul D. Tungatt - Middletown CT

Olin Corporation - New Haven CT

B22D 2704
B22D 1110

164459

A method and apparatus for casting a grain refined ingot from a metallic melt supplied to a casting mold through a feed tube. The feed tube is provided with at least one cooling passageway through which a cooling fluid cyclically flows to form a zone of fine dendrites on the inner peripheral surface of the mold. An inductor is provided to reheat the zone of fine dendrites to detach dendrite arms into the melt which serve as nuclei for grain refinement as the melt solidifies into a cast ingot in the mold.

45376271, Aug 27, 1985

Apr 11, 1984

6/599098

Derek E. Tyler - Cheshire CT
Harvey P. Cheskis - North Haven CT
Paul D. Tungatt - Middletown CT

Olin Corporation - New Haven CT

C22B 1500

75 76

A copper or copper alloy material having a reduced number of defects is formed by removing impurities from the material while in a molten state with a member having exposed silicon carbide particles. The member may be a bed filter formed from bed media having exposed silicon carbide particles, a porous body formed from a slurry containing silicon carbide, a porous body having at least one melt contacting surface coated with a silicon carbide material, and/or a lining having at least one melt contacting surface coated with a silicon carbide material.