Patent US3009532A successfully refreshed from Google Patents.
US3009532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extension type ladder
Assignee: Putnam Rolling Ladder Co Inc
•
Filing: 1959-04-01
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Granted: 1961-11-21
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Expires: 1979-04-01
Abstract
No abstract record available.
Inventors
- 👤 Charles D Richard
- 👤 Edward T Gillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:49
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2444918A
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US2739829A
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US2658015A
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GB758535A
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US2855650A
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US2885132A
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US2870793A
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US2815043A
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US2932358A
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US2862650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |