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US2677203A
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Ditching attachment for bulldozers
Assignee: Individual
•
Filing: 1950-08-21
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Granted: 1954-05-04
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Expires: 1970-08-21
Abstract
No abstract record available.
Inventors
- 👤 Edward F Poirier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:18
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US217506A
Cited
USRE22613E
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FR396807A
Cited
US1473890A
Cited
US1909752A
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US2247680A
Cited
US2233237A
Cited
US2404518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |