US2680416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming underground drainage and irrigation openings
Assignee: International Basic Economy Corp
•
Filing: 1951-03-24
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Granted: 1954-06-08
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Expires: 1971-03-24
Abstract
No abstract record available.
Inventors
- 👤 Robert P Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:07
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/10; E02F5/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US123092A
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US1218727A
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US1340836A
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US1314279A
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US1416691A
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US1808974A
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US1905975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |