Irrigation control
Abstract
Abstract A WATER METERING APPARATUS HAVING AN ADJUSTABLE INLET DEVICE WHICH REGULATES THE FLOW OF WATER TO THE FIELD CORRUGATES THROUGH A TUBE. AN IRRIGATION DITCH VALVE LOCATING IN THE EARTH OR CONCRETE LINED OPEN DITCH BANNK FOR THE IDENTICAL METERING AND AUTOMATIC DISTRIBUTION OF WATERS TO FARM LANDS. THE METERING MEANS COMPRISING A ADJUSTABLE CAP OR GATE PORTION ACTING WITH A CONDUIT PORTION TO SELCTIVELY SIZE A WATER INLET RESPONSIVE TO CROP AND SEASONAL DEMANDS. A DITCH VALVE SYSTEM TYPICALLY FEEDING INDIVIDUAL CORRUGATES AND FURROWS, OR ACCUUMULATING TO FEED BETWEEN BORDERS AND DIKES THROUGH EQUAL SPACING AND LEVEL ALINEMENT THAT AFFORDS VALVE IDENTITY THROUGH UNIFORM SUBMERSION BEOW THE CHECKED WATER LINE.
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Bibliographic Details
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |