US2854868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rail elevating device
Assignee: American Steel Foundries
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Filing: 1954-11-01
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Granted: 1958-10-07
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Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Walter T Hake
- 👤 Howard E Laubach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:38
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/34; B23Q5/38; B23Q5/40; B23Q5/402; B23B; B23B3/00; B23B3/08; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5104; Y10T29/5105; Y10T29/5109; Y10T29/5111; Y10T408/00; Y10T408/91; Y10T409/00; Y10T409/30; Y10T409/304536; Y10T409/305544; Y10T409/305656; Y10T409/309576; Y10T409/309744; Y10T82/00; Y10T82/25; Y10T82/2511
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190107183A
Cited
US709568A
Cited
US1454080A
Cited
US1447422A
Cited
US2260635A
Cited
US2333341A
Cited
FR1012268A
Cited
FR1049775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |