Patent US4243412A successfully refreshed from Google Patents.
US4243412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental alloy
Assignee: Manufacturers Hanover Trust Co
•
Filing: 1979-06-07
•
Granted: 1981-01-06
•
Expires: 1999-06-07
Abstract
Abstract A nickel base dental alloy having the following composition: ______________________________________ Percent by Weight ______________________________________ Chromium 10-20 Molybdenum 4-10 Iron 3-6 Columbium 2-6 Aluminum up to 2.0 Silicon 1.0-3.0 Carbon 0.05-0.5 Nickel Balance. ______________________________________
Inventors
- 👤 Dinesh C. Tandon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:23
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/055; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
44 words
A corrosion resistant biocompatible dental alloy which exhibits good porcelain to metal bond strength which consists of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 10-20
Molybdenum 4-10
Iron 3-6
Columbium 2-6
Aluminum up to 2.0
Silicon 1.0-3.0
Carbon 0.05-0.5
Nickel Balance.
______________________________________
Claim 2
Dependent Claim
44 words
A corrosion resistant biocompatible dental alloy which exhibits good porcelain to metal bond strength which consists of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 10-20
Molybdenum 4-10
Iron 3-6
Columbium 2-6
Aluminum up to 2.0
Silicon 1.0-3.0
Carbon 0.05-0.5
Nickel Balance.
______________________________________
Claim 3
Dependent Claim
32 words
A dental alloy which consists essentially of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 17.10
Molybdenum 4.60
Iron 6.00
Columbium 5.80
Aluminum 1.00
Silicon 1.55
Carbon 0.25
Nickel Balance.
______________________________________
Claim 4
Dependent Claim
32 words
A dental alloy which consists essentially of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 17.10
Molybdenum 4.60
Iron 6.00
Columbium 5.80
Aluminum 1.00
Silicon 1.55
Carbon 0.25
Nickel Balance.
______________________________________
Claim 5
Dependent Claim
29 words
A dental alloy which consists of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 14.0
Molybdenum 5.0
Iron 3.0
Columbium 5.0
Silicon 1.0
Carbon 0.12
Nickel Balance.
______________________________________
Claim 6
Dependent Claim
29 words
A dental alloy which consists of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 14.0
Molybdenum 5.0
Iron 3.0
Columbium 5.0
Silicon 1.0
Carbon 0.12
Nickel Balance.
______________________________________
Claim 7
Dependent Claim
30 words
A dental alloy which consists essentially of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 14.0
Molybdenum 10.0
Iron 6.0
Columbium 5.0
Silicon 1.0
Carbon 0.12
Nickel Balance.
______________________________________
Claim 8
Dependent Claim
30 words
A dental alloy which consists essentially of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 14.0
Molybdenum 10.0
Iron 6.0
Columbium 5.0
Silicon 1.0
Carbon 0.12
Nickel Balance.
______________________________________
Claim 9
Dependent Claim
43 words
A corrosion resistant biocompatible dental alloy which exhibits good porcelain to metal bond strength which consists essentially of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 17-18
Molybdenum 4-5
Iron 5-6
Columbium 4.5-6.0
Aluminum 0.5-1.2
Silicon 1.4-2.0
Carbon 0.2-0.4
Nickel Balance
______________________________________
Claim 10
Dependent Claim
43 words
A corrosion resistant biocompatible dental alloy which exhibits good porcelain to metal bond strength which consists essentially of the following constituents: ______________________________________
Percent by Weight
______________________________________
Chromium 17-18
Molybdenum 4-5
Iron 5-6
Columbium 4.5-6.0
Aluminum 0.5-1.2
Silicon 1.4-2.0
Carbon 0.2-0.4
Nickel Balance
______________________________________
References Cited (Backward Citations)
US2994605A
Cited
US3544315A
Cited
US3841868A
Cited
US3749570A
Cited
US3914867A
Cited
US3948653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |