US2498989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile stop mechanism
Assignee: Carnegie Illinois Steel Corp
•
Filing: 1948-06-07
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Granted: 1950-02-28
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Expires: 1968-06-07
Abstract
No abstract record available.
Inventors
- 👤 Gustave G Erland
- 👤 Axel B Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:24
CPC Classifications
B; B21; B21B; B21B39/00; B21B39/002
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) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |