Patent US3128178A successfully refreshed from Google Patents.
US3128178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tantalum-titanium base alloy
Assignee: California Research LLC
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Filing: 1961-02-28
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Granted: 1964-04-07
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Expires: 1981-02-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward F Duffek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:35
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A DUCTILE METAL COMPOSITION RESISTANT TO THE ACTION OF HOT OXIDIZING AND NON-OXIDIZING ACIDS AND CONSISTING ESSENTIALLY OF, IN PERCENT BY WEIGHT, 10-30% OF TITANIUM, 3-10% OF VANADIUM, .25 TO 3% OF NICKEL, UP TO 25% COLUMBIUM, UP TO 10% TUNGSTEN, AND THE BALANCE ESSENTIALLY TANTALUM, WITH THE TANTALUM BEING PRESENT IN AN AMOUNT OF AT LEAST 30%.
Claim 2
Dependent Claim
58 words
A DUCTILE METAL COMPOSITION RESISTANT TO THE ACTION OF HOT OXIDIZING AND NON-OXIDIZING ACIDS AND CONSISTING ESSENTIALLY OF, IN PERCENT BY WEIGHT, 10-30% OF TITANIUM, 3-10% OF VANADIUM, .25 TO 3% OF NICKEL, UP TO 25% COLUMBIUM, UP TO 10% TUNGSTEN, AND THE BALANCE ESSENTIALLY TANTALUM, WITH THE TANTALUM BEING PRESENT IN AN AMOUNT OF AT LEAST 30%.
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |