US2474464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pit prop and the like
Assignee: Individual
•
Filing: 1948-04-14
•
Granted: 1949-06-28
•
Expires: 1968-04-14
Abstract
No abstract record available.
Inventors
- 👤 Cable Richard George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:06
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/14; E21D15/46; E21D15/465; E21D15/005; E21D15/50; E21D15/51; E21D15/512
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) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |