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Patent US2726901A successfully refreshed from Google Patents.
US2726901A
Expired / Lapsed
US
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Safety step for ladder
Assignee: Individual
•
Filing: 1953-04-13
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Granted: 1955-12-13
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Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Allen F Newman
- 👤 Ernest H King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:25
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/08; E06C7/081; E06C7/16; E06C7/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US950559A
Cited
US1090836A
Cited
US1497464A
Cited
US1615135A
Cited
US2415327A
Cited
US2528317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |