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US2320260A
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US
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Columbium-bearing austenitic steel and articles produced therefrom
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1940-11-22
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Granted: 1943-05-25
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Expires: 1960-11-22
Abstract
No abstract record available.
Inventors
- 👤 Vere B Browne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:33
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-05-24 | 1946-11-23 | 1947-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-24 | 1950-11-23 | 1951-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-24 | 1954-11-23 | 1955-05-25 | $7700.00 | Window Closed / Lapsed |