US2833480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highway railroad crossing
Assignee: Individual
•
Filing: 1952-07-10
•
Granted: 1958-05-06
•
Expires: 1972-07-10
Abstract
No abstract record available.
Inventors
- 👤 Clifford H Sandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:28
CPC Classifications
E; E01; E01C; E01C9/00; E01C9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US670570A
Cited
US1467783A
Cited
US1965026A
Cited
GB371147A
Cited
US1939425A
Cited
US2181169A
Cited
FR849322A
Cited
US2320593A
Cited
US2540400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |