US3007540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Personnel work structure convertible to extension ladder and scaffolding means
Assignee: Individual
•
Filing: 1959-10-16
•
Granted: 1961-11-07
•
Expires: 1979-10-16
Abstract
No abstract record available.
Inventors
- 👤 John P Reinhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:06
CPC Classifications
E; E04; E04G; E04G1/00; E04G1/14; E06; E06C; E06C1/00; E06C1/02; E06C1/38; E06C1/39
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US799068A
Cited
US1593945A
Cited
US1588295A
Cited
US1636085A
Cited
US1953390A
Cited
US2828166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |