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US2940845A
Expired / Lapsed
US
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Columbium-titanium base oxidationresistant alloys
Assignee: Kennecott Corp
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Filing: 1958-02-24
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Granted: 1960-06-14
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Expires: 1978-02-24
Abstract
No abstract record available.
Inventors
- 👤 Robert I Jaffee
- 👤 Fred R Schwartzberg
- 👤 Dean N Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:37
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1588518A
Cited
US1701299A
Cited
DE718822C
Cited
US2822268A
Cited
US2838396A
Cited
US2883282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |