US2740539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable charging elevator for concrete mixers
Assignee: Individual
•
Filing: 1953-09-18
•
Granted: 1956-04-03
•
Expires: 1973-09-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Grover Edward Oaks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:54
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/04; B28C7/06; B28C7/08; B28C7/0835; B28C7/0847; B28C7/0852
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US950122A
Cited
US1209668A
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US1219761A
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US1335934A
Cited
US1617820A
Cited
US1712495A
Cited
US1966390A
Cited
US2310592A
Cited
FR968233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |