US2924428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cranes
Assignee: Individual
•
Filing: 1956-02-23
•
Granted: 1960-02-09
•
Expires: 1976-02-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Whittall
- 👤 Marshall F Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:14
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18; B66C2700/00; B66C2700/06; B66C2700/062; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18832; Y10T74/18848
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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |