Patent US2972425A successfully refreshed from Google Patents.
US2972425A
Expired / Lapsed
US
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Trench hoe dipper
Assignee: Individual
•
Filing: 1959-01-14
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Granted: 1961-02-21
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Expires: 1979-01-14
Abstract
No abstract record available.
Inventors
- 👤 James O Anderson
- 👤 Robert M Stringer
- 👤 Sr Van D Lott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:35
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F5/00; E02F5/02; E02F5/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US816057A
Cited
US2084718A
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US2158348A
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US2148171A
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US2411498A
Cited
US2660323A
Cited
US2838856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |