US2662680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepladder
Assignee: Individual
•
Filing: 1951-10-01
•
Granted: 1953-12-15
•
Expires: 1971-10-01
Abstract
No abstract record available.
Inventors
- 👤 Lawrence E Bronson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:13
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44; 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)
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US2510515A
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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) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |