US2629532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder construction
Assignee: Individual
•
Filing: 1950-03-15
•
Granted: 1953-02-24
•
Expires: 1970-03-15
Abstract
No abstract record available.
Inventors
- 👤 Gordon W Tupper
- 👤 Orville N Mertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:30
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/18; E06C7/181; E06C7/183; E06C1/00; E06C1/02; E06C1/34; E06C1/345; E06C1/36; E06C1/52
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) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |