US2805761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surge car apparatus
Assignee: Bituminous Coal Research Inc
•
Filing: 1955-07-21
•
Granted: 1957-09-10
•
Expires: 1975-07-21
Abstract
No abstract record available.
Inventors
- 👤 Stroh Gerald F H Von
- 👤 Howard J Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:10
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34; E02F3/348; E02F3/3483; E21; E21F; E21F13/00; E21F13/02; E21F13/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20883E
Cited
US1408299A
Cited
US1780299A
Cited
US1908434A
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US1932897A
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US2168053A
Cited
US2177936A
Cited
US2196659A
Cited
US2354336A
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US2290950A
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US2479823A
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US2514993A
Cited
US2719642A
Cited
US2623630A
Cited
US2695700A
Cited
US2747721A
Cited
US2696104A
Cited
US2725976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |