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US1040313A
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Extension step-ladder.
Assignee: FOUR IN ONE MANUFACTURING Co
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Filing: 1912-03-04
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Granted: 1912-10-08
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Expires: 1932-03-04
Abstract
No abstract record available.
Inventors
- 👤 Burt A Handy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:46
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/38; E06C1/387
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) | 1915-10-08 | 1916-04-08 | 1916-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-10-08 | 1920-04-08 | 1920-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-10-08 | 1924-04-08 | 1924-10-08 | $7700.00 | Window Closed / Lapsed |