Patent US2763992A successfully refreshed from Google Patents.
US2763992A
Expired / Lapsed
US
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Irrigation weir
Assignee: Individual
•
Filing: 1952-09-16
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Granted: 1956-09-25
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Expires: 1972-09-16
Abstract
No abstract record available.
Inventors
- 👤 Eldon P Rothenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:21
CPC Classifications
E; E02; E02B; E02B13/00; E02B13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US432474A
Cited
US1404325A
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US1564927A
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US1970451A
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US1968743A
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US2345650A
Cited
US2411727A
Cited
US2619253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |