US3454175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for loading and unloading containers
Assignee: Dempster Systems Inc
•
Filing: 1966-05-06
•
Granted: 1969-07-08
•
Expires: 1986-05-06
Abstract
No abstract record available.
Inventors
- 👤 Thomas Henry Kellaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:05
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/64; B60P1/6418; B60P1/6454
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1152510A
Cited
US1442954A
Cited
US1670232A
Cited
US2308648A
Cited
US2517716A
Cited
US2894785A
Cited
DE1003050B
Cited
GB847163A
Cited
US3144149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |