Patent US1496201A successfully refreshed from Google Patents.
US1496201A
Expired / Lapsed
US
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Self-supporting extension ladder
Assignee: RUSSELL O WEBSTER
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Filing: 1922-01-11
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Granted: 1924-06-03
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Expires: 1942-01-11
Abstract
No abstract record available.
Inventors
- 👤 Charles E Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:58
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/46; E06C1/00; E06C1/02; E06C1/14; E06C1/16; E06C1/20; E06C1/32; E06C7/423
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) | 1927-06-03 | 1927-12-03 | 1928-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-06-03 | 1931-12-03 | 1932-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-06-03 | 1935-12-03 | 1936-06-03 | $7700.00 | Window Closed / Lapsed |