Patent US3485316A successfully refreshed from Google Patents.
Patent US3587972A successfully refreshed from Google Patents.
US3587972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irrigation system
Assignee: Individual
•
Filing: 1968-05-06
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Granted: 1971-06-28
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Expires: 1988-05-06
Abstract
Abstract AN IRRIGATION SYSTEM HAVING A PLURALITY OF FLEXIBLE PIPES LEADING FROM A MAIN PIPE INTO WHICH WATER IS PUMPED. EACH FLEXIBLE PIPE HAS EXTENDING THEREFROM A PLURALITY OF HOSES WHICH ARE OF SUCH FLEXIBILITY, INNER DIAMETER, AND LENGTH THAT WATER FLOWING THROUGH THE MAIN PIPE, THROUGH THE FLEXIBLE PIPES, AND THROUGH AND FROM EACH OF THE HOSES CAUSES EACH HOSE TO SWIRL IN SUCH A MANNER AS TO DISTRIBUTE WATER FLOWING THEREFROM OVER AN AREA SURROUNDING THAT HOSE. EACH HOSE IS PROVIDED WITH MEANS WHICH AUTOMATICALLY STOPS THE FLOW OF AIR OR WATER THERETHROUGH WHEN AIR PRESSURE OR WATER PRESSURE WITHIN THE PIPES FALLS BELOW A SPECIFIED LEVEL.
Inventors
- 👤 Waldo W Weeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:28
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02; A01G25/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |