US3369892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treatable nickel-containing refractory carbide tool steel
Assignee: Alloy Technology International Inc
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Filing: 1965-08-20
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Granted: 1968-02-20
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Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 John L Ellis
- 👤 Stuart E Tarkan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:49
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/10; C22C38/105; C22C29/00; C22C29/02; C22C29/06; C22C29/067
Claims Analysis
Total Claims: 0
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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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |