Patent US2763420A successfully refreshed from Google Patents.
US2763420A
Expired / Lapsed
US
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Collapsible ladder assemblies
Assignee: H & H Truck Tank Co Inc
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Filing: 1953-12-24
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Granted: 1956-09-18
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Expires: 1973-12-24
Abstract
No abstract record available.
Inventors
- 👤 Richard G Hebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:49
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; E; E06; E06C; E06C5/00; E06C5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |