US4049427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-precious dental alloy
Assignee: Individual
•
Filing: 1976-10-08
•
Granted: 1977-09-20
•
Expires: 1996-10-08
Abstract
Abstract A non-precious dental alloy is disclosed which is particularly useful in dental prosthesis, is strong, oxidation-resistant, aesthetically pleasing and compatible with porcelain bonding upon being formed into complicated shapes. The alloy consists of, by weight, 14-21% Cr, 0.9-1.4% Be, 0.3-0.4% Cu, 8-12% Co, 0.03-0.05% Mn, 0.8-1.2% Fe, 1-1.5% Mo, 1-1.5% Al, 0.3-0.4% Si, balance Ni.
Inventors
- 👤 Ricardo Guerra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:23
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: 4
Claim 1
Independent Claim
34 words
An alloy suitable for dental prosthetic work consisting essentially of, by weight: 14-21% chromium, 8-12% cobalt, 1-1.5% molybdenum, 1-1.5% aluminum, 0.9-1.4% beryllium, 0.8- 1.2% iron, 0.3-0.4% copper, 0.3-0.4% silicon, 0.03- 0.05% manganese, balance nickel.
Claim 2
Dependent Claim
34 words
An alloy suitable for dental prosthetic work consisting essentially of, by weight: 14-21% chromium, 8-12% cobalt, 1-1.5% molybdenum, 1-1.5% aluminum, 0.9-1.4% beryllium, 0.8- 1.2% iron, 0.3-0.4% copper, 0.3-0.4% silicon, 0.03- 0.05% manganese, balance nickel.
Claim 3
Dependent Claim
38 words
The alloy according to claim 1, consisting of, by weight, about 66.8% Ni, 17.6% Cr, about 1.2% Be, about 0.3% Cu, about 10.0% Co, 0.04% Mn, about 1.0% Fe, about 1.4% Mo, about 1.3% Al, about 0.4% Si.
Claim 4
Dependent Claim
30 words
The alloy according to claim 1, consisting of, by weight, 66.78% Ni, 17.60% Cr, 1.19% Be, 0.34% Cu, 9.99% Co, 0.04% Mn, 1.02% Fe, 1.36% Mo, 1.29% Al, 0.39% Si.
References Cited (Backward Citations)
US3749570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |