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US2796685A
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Method and apparatus for earth grading and allied arts
Assignee: ISABELL MCK BENSINGER
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Filing: 1951-12-15
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Granted: 1957-06-25
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Expires: 1971-12-15
Abstract
No abstract record available.
Inventors
- 👤 Bensinger Isabell Mck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:55
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84; E02F3/844; E02F3/847
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1099385A
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US1486886A
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US2043413A
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US2109475A
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US2340216A
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US2494069A
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US2599490A
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US2636290A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |