US2997965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevated railway
Assignee: Individual
•
Filing: 1959-05-01
•
Granted: 1961-08-29
•
Expires: 1979-05-01
Abstract
No abstract record available.
Inventors
- 👤 Alan B Hawes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:48
CPC Classifications
B; B61; B61B; B61B13/00; B61B13/04; B61B13/06; E; E01; E01B; E01B25/00; E01B25/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US600371A
Cited
US750247A
Cited
US628174A
Cited
US867007A
Cited
US1541281A
Cited
US1801141A
Cited
US2756689A
Cited
FR1147820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |