US4038752A
Expired / Lapsed
US
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Dental alloys
Assignee: Stoody Co
•
Filing: 1975-12-30
•
Granted: 1977-08-02
•
Expires: 1995-12-30
Abstract
Abstract A corrosion-resistant dental prosthesis that consists of a nickel-base alloy with significant quantities of chromium, silicon, manganese and boron.
Inventors
- 👤 Robert Edward Phelps
- 👤 Robin Spill
- 👤 Barry Edward Print
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:43
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
A dental prosthesis of an alloy consisting essentially of: ______________________________________
Constituent % by weight of alloy
______________________________________
Carbon up to 0.25
Chromium 10.0 to 25.0
Silicon 0.5 to 7.5
Manganese 0.1 to 1.5
Iron up to 3.0
Boron 0.1 to 0.6
Copper up to 3.0
Nickel Balance
______________________________________
Claim 2
Dependent Claim
48 words
A dental prosthesis of an alloy consisting essentially of: ______________________________________
Constituent % by weight of alloy
______________________________________
Carbon up to 0.25
Chromium 10.0 to 25.0
Silicon 0.5 to 7.5
Manganese 0.1 to 1.5
Iron up to 3.0
Boron 0.1 to 0.6
Copper up to 3.0
Nickel Balance
______________________________________
Claim 3
Dependent Claim
50 words
A dental prosthesis as claimed in claim 1, consisting essentially of: ______________________________________
Constituents % by weight of alloy
______________________________________
Carbon up to 0.15
Chromium 10.0 to 20.0
Silicon 0.5 to 4.0
Manganese 0.1 to 1.0
Iron up to 3.0
Boron 0.1 to 0.6
Copper up to 2.0
Nickel Balance
______________________________________
Claim 4
Dependent Claim
46 words
A dental prosthesis as claimed in claim 1 consisting essentially of: ______________________________________
Constituents % by weight of alloy
______________________________________
Carbon up to 0.15
Chromium 15.0 to 20.0
Silicon 3.0 to 4.0
Manganese 0.5 to 1.0
Iron up to 3.0
Boron 0.3 to 0.6
Nickel Balance
______________________________________
Claim 5
Dependent Claim
46 words
A dental prosthesis as claimed in claim 1 consisting essentially of: ______________________________________
Constituents % by weight of alloy
______________________________________
Carbon up to 0.15
Chromium 15.0 to 17.0
Silicon 1.0 to 2.0
Manganese 0.5 to 1.0
Iron up to 1.0
Boron 0.1 to 0.4
Nickel Balance
______________________________________
Claim 6
Dependent Claim
46 words
A dental prosthesis as claimed in claim 1 consisting essentially of: ______________________________________
Constituents % by weight of alloy
______________________________________
Carbon up to 0.15
Chromium 15.0 to 20.0
Silicon 3.0 t0 4.0
Manganese 0.5 to 1.0
Iron up to 3.0
Boron 0.1 to 0.4
Nickel Balance
______________________________________
Claim 7
Dependent Claim
46 words
A dental prosthesis as claimed in claim 1 consisting essentially of: ______________________________________
Constituents % by weight of alloy
______________________________________
Carbon up to 0.15
Chromium 15.0 to 17.0
Silicon 0.5 to 1.0
Manganese 0.5 to 1.0
Iron up to 1.0
Boron 0.3 to 0.6
Nickel Balance
______________________________________
Claim 8
Dependent Claim
50 words
A dental prosthesis as claimed in claim 1 consisting essentially of: ______________________________________
Constituents % by weight of alloy
______________________________________
Carbon up to 0.15
Chromium 15.0 to 20.0
Silicon 3.0 to 4.0
Manganese 0.5 to 1.0
Iron up to 3.0
Boron 0.3 to 0.6
Copper 1.0 to 2.0
Nickel Balance
______________________________________
Claim 9
Dependent Claim
50 words
A dental prosthesis as claimed in claim 1 consisting essentially of: ______________________________________
Constituents % by weight of alloy
______________________________________
Carbon up to 0.15
Chromium 15.0 to 17.0
Silicon 1.0 to 2.0
Manganese 0.5 to 1.0
Iron up to 1.0
Boron 0.1 to 0.4
Copper 1.0 to 2.0
Nickel Balance
______________________________________
Claim 10
Dependent Claim
46 words
A dental prosthesis as claimed in claim 1 consisting essentially of: ______________________________________
Constituents % by weight of alloy
______________________________________
Carbon up to 0.15
Chromium 10.0 to 15.0
Silicon 3.0 to 4.0
Manganese 0.5 to 1.0
Iron up to 3.0
Boron 0.1 to 0.4
Nickel Balance
______________________________________
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |