Patent US2919490A successfully refreshed from Google Patents.
US2919490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ditcher gauge
Assignee: Individual
•
Filing: 1957-07-12
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Granted: 1960-01-05
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Expires: 1977-07-12
Abstract
No abstract record available.
Inventors
- 👤 Bethany Alex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:09
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/14; E02F5/145
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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |