Patent US2652981A successfully refreshed from Google Patents.
US2652981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway crossing
Assignee: Individual
•
Filing: 1951-02-23
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Granted: 1953-09-22
•
Expires: 1971-02-23
Abstract
No abstract record available.
Inventors
- 👤 Robert F Lanier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:36
CPC Classifications
E; E01; E01C; E01C9/00; E01C9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1568677A
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CH120742A
Cited
US1849048A
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US1881660A
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US2017336A
Cited
US2174035A
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US2124247A
Cited
US2256025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |