US2974809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor cranes
Assignee: SELLARS
•
Filing: 1958-08-14
•
Granted: 1961-03-14
•
Expires: 1978-08-14
Abstract
No abstract record available.
Inventors
- 👤 Elmer V Sellars
- 👤 Clarence W Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:45
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C23/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US935170A
Cited
US1384811A
Cited
US1428887A
Cited
US1684607A
Cited
US2649189A
Cited
US2859881A
Cited
US2855109A
Cited
US2858946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |