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Patent US2489991A successfully refreshed from Google Patents.
US2489991A
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Dirt elevator attachment
Assignee: TUCKER S Inc
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Filing: 1946-09-26
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Granted: 1949-11-29
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Expires: 1966-09-26
Abstract
No abstract record available.
Inventors
- 👤 William H Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:11
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7695; A; A01; A01B; A01B13/00; A01B13/08; A01B13/10; A01B13/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1015004A
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US1429563A
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US1658354A
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US1767992A
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US2000072A
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US2113941A
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US2089319A
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US2248709A
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US2280473A
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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) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |