Patent US1079881A successfully refreshed from Google Patents.
US2723071A
Expired / Lapsed
US
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Adjustable leg ladder
Assignee: Individual
•
Filing: 1951-08-04
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Granted: 1955-11-08
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Expires: 1971-08-04
Abstract
No abstract record available.
Inventors
- 👤 Merryweather Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:10
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44; E06C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US334237A
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US809057A
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US1003407A
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US1251192A
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US1582402A
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US2503626A
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US2517771A
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US2567806A
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US2581782A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |