Patent US2670120A successfully refreshed from Google Patents.
US2670120A
Expired / Lapsed
US
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Collapsible ladder, double ladder, and stepladder
Assignee: Individual
•
Filing: 1950-05-12
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Granted: 1954-02-23
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Expires: 1970-05-12
Abstract
No abstract record available.
Inventors
- 👤 Sanguineti Emanuele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:25
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/38; E06C1/383; E06C1/3835
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |