US2576277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extendable step ladder
Assignee: Individual
•
Filing: 1949-07-19
•
Granted: 1951-11-27
•
Expires: 1969-07-19
Abstract
No abstract record available.
Inventors
- 👤 John M Biegen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:29
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/18; E06C7/181; E06C7/183; E06C1/00; E06C1/02; E06C1/14; E06C1/16; E06C1/20; E06C1/22; E06C1/38; E06C1/39
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |