US4179288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Palladium base dental alloy
Assignee: NEOLOY/DENTEX Inc
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Filing: 1979-01-24
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Granted: 1979-12-18
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Expires: 1999-01-24
Abstract
Abstract The present invention provides dental alloys which may be used in producing inlays, crowns and the like. It also provides alloys which are especially adapted for the application of low fusing porcelain for facings to improve the aesthetic appearance of the denture. The alloy of the present invention has a melting point around 2400° F. In its broadest aspect the alloy consists of gallium 7 to 12%, gold 2 to 5%, boron 0.125 to 0.50% and the balance palladium.
Inventors
- 👤 Emil M. Prosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:42
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/04; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
16 words
A dental alloy consisting essentially of: Gallium--7% to 12% Gold--2% to 5% Boron--0.125% to 0.50% Palladium--Balance
Claim 2
Dependent Claim
16 words
A dental alloy consisting essentially of: Gallium--7% to 12% Gold--2% to 5% Boron--0.125% to 0.50% Palladium--Balance
Claim 3
Dependent Claim
45 words
A dental alloy especially adapted for the adhesion of porcelain having a fusing temperature of 1750° F. to 1850° F., consisting essentially of: Gallium--7% to 12% Gold--2% to 5% Boron--0.125% to 0.50% Palladium--Balance said alloy having a melting temperature of 2375° F. to 2550° F.
Claim 4
Dependent Claim
45 words
A dental alloy especially adapted for the adhesion of porcelain having a fusing temperature of 1750° F. to 1850° F., consisting essentially of: Gallium--7% to 12% Gold--2% to 5% Boron--0.125% to 0.50% Palladium--Balance said alloy having a melting temperature of 2375° F. to 2550° F.
Claim 5
Dependent Claim
19 words
A dental alloy having a melting temperature of approximately 2400° F. and consisting essentially of: Gallium--8% Gold--2% Boron--0.125% Palladium--Balance
Claim 6
Dependent Claim
19 words
A dental alloy having a melting temperature of approximately 2400° F. and consisting essentially of: Gallium--8% Gold--2% Boron--0.125% Palladium--Balance
Claim 7
Dependent Claim
33 words
A dental alloy especially adapted to have porcelain fused thereto at approximately 1800° F., said alloy consisting essentially of: Gallium--8% Gold--2% Boron--0.125% Palladium--Balance said alloy having a melting temperature of approximately 2400° F.
Claim 8
Dependent Claim
33 words
A dental alloy especially adapted to have porcelain fused thereto at approximately 1800° F., said alloy consisting essentially of: Gallium--8% Gold--2% Boron--0.125% Palladium--Balance said alloy having a melting temperature of approximately 2400° F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |