US3116145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten-hafnium alloy casting
Assignee: Cyprus Amax Minerals Co
•
Filing: 1962-04-30
•
Granted: 1963-12-31
•
Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Semchyshen Marion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:00
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A CAST ALLOY CONTAINING FROM .02% TO 5% HAFNIUM, UP TO .50% CARBON, LESS THAN .005% OXYGEN, NOT MORE THAN 1% OF METAL FROM THE GROUP CONSISTING OF ZIRCONIUM, TANTALUM AND COLUMBIUM, NOT MORE THAN 10% MOLYBDENUM AND THE BALANCE CONSISTING ESSENTIALLY OF TUNGSTEN.
Claim 2
Dependent Claim
44 words
A CAST ALLOY CONTAINING FROM .02% TO 5% HAFNIUM, UP TO .50% CARBON, LESS THAN .005% OXYGEN, NOT MORE THAN 1% OF METAL FROM THE GROUP CONSISTING OF ZIRCONIUM, TANTALUM AND COLUMBIUM, NOT MORE THAN 10% MOLYBDENUM AND THE BALANCE CONSISTING ESSENTIALLY OF TUNGSTEN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |