Patent US4609290A successfully refreshed from Google Patents.
US806501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propped ladder.
Assignee: Individual
•
Filing: 1905-04-27
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Granted: 1905-12-05
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Expires: 1925-04-27
Abstract
No abstract record available.
Inventors
- 👤 Manning M Rouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:54
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/14; E06C1/16; E06C1/20; E06C1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1908-12-04 | 1909-06-05 | 1909-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-12-04 | 1913-06-05 | 1913-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-12-04 | 1917-06-05 | 1917-12-05 | $7700.00 | Window Closed / Lapsed |