US2840290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic ladders
Assignee: ERIC LADD
•
Filing: 1954-03-31
•
Granted: 1958-06-24
•
Expires: 1974-03-31
Abstract
No abstract record available.
Inventors
- 👤 John F Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:14
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/04; E06C1/08; E06C1/12; E06C5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US283391A
Cited
US306974A
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FR679453A
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US2109571A
Cited
US2642217A
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US2621836A
Cited
US2647677A
Cited
US2659902A
Cited
US2670747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |