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Patent US3375878A successfully refreshed from Google Patents.
US3375878A
Expired / Lapsed
US
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Tractor auger-type backfiller
Assignee: Arrow Manufacturing Co Inc
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Filing: 1965-06-30
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Granted: 1968-04-02
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Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 Dorn Russell John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:10
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/78; E02F3/783; E02F3/06; E02F5/00; E02F5/22; E02F5/223
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) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |