US2772919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sump-type containers for transporting and dumping equipment
Assignee: Dempster Brothers Inc
•
Filing: 1952-12-29
•
Granted: 1956-12-04
•
Expires: 1972-12-29
Abstract
No abstract record available.
Inventors
- 👤 Harry W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:11
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/48; B60P1/483; B65; B65F; B65F1/00; B65F1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US304539A
Cited
US504355A
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US784815A
Cited
US1973560A
Cited
US2069739A
Cited
US2199520A
Cited
US2305148A
Cited
US2369722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |