Patrick D Mccabe

US Patent:

49178610, Apr 17, 1990

Filed:

Nov 15, 1988

Appl. No.:

7/271578

Inventors:

Stephen P. Schaffer - Hamburg NY
Patrick J. McCabe - Tonawanda NY

Assignee:

Pierce & Stevens Corporation - Buffalo NY

International Classification:

C22C 504

US Classification:

420463

Abstract:

Dental restorations are made of a palladium alloy which consists essentially of, on a weight basis, 50-85 percent palladium; 5-40 percent of at least one metal selected from the group consisting of copper and cobalt; 1-15 percent gallium; up to 5 percent of a modifier selected from the group consisting of nickel, gold, indium, ruthenium, tin and mixtures thereof; from 0. 005 up to 1 percent, ordinarily less than about 0. 2 percent, of an oxygen scavenging component which is a member selected from the group consisting of germanium, lithium, and mixtures thereof; and up to 0. 5 percent of a grain refiner selected from the group consisting of rhenium and iridium. The alloy is free of boron.

US Patent:

49434837, Jul 24, 1990

Filed:

Jan 25, 1989

Appl. No.:

7/301139

Inventors:

Clyde E. Ingersoll - Tonawanda NY
Stephen P. Schaffer - Hamburg NY
Patrick J. McCabe - Tonawanda NY

Assignee:

Williams Dental Company, Inc. - Buffalo NY

International Classification:

B32B 1504
C22C 504

US Classification:

428433

Abstract:

Dental restorations are made of a high palladium alloy which consists essentially of, on a weight basis, 70-82 percent palladium; 5-8 percent gold; 6. 5-8 weight percent silver; 5-9 percent gallium; from 4 to 8 weight percent of a surface oxide producing modifier selected from the group consisting of indium, tin and mixtures thereof, from 0. 01 up to 2 percent, ordinarily less than about 0. 5 percent, of an oxygen scavenging component which is a member selected from the group consisting of germanium, lithium and mixtures thereof; and up to 2 percent of a grain refiner selected from the group consisting of ruthenium, rhenium and iridium. Alloy can be melted without the need of shielding the alloy from the atmosphere.

US Patent:

51749548, Dec 29, 1992

Filed:

Mar 1, 1991

Appl. No.:

7/662001

Inventors:

Stephen P. Schaffer - Hamburg NY
Patrick J. McCabe - Tonawanda NY
Bernt-Roger Gustafsson - Maersta, SE

Assignee:

Ivoclar N.A. - Amherst NY

International Classification:

C22C 504

US Classification:

420463

Abstract:

The present invention relates to alloys containing about 50-90% palladium, 0-37% gold, 0-3% platinum, 0-35% silver, 0. 5-8% gallium, 0-8% tin, and up to 0. 2% of a grain refiner selected from the group consisting of iridium, rhenium and ruthenium, or mixtures thereof. In order to withstand the forces of mastication over long spans or cantilever sections, the alloys are more rigid than conventional palladium based alloys. The alloys may be utilized for conventional crown and bridgework or may be fabricated into a number of different prostheses for use on dental implants. These applications include, for example, metal base plates for dentures, metal retaining bars for removable or fixed removable dentures, full metal coverage crowns and bridges, and metal substructures to be veneered with resin or porcelain materials.