Patent US3761340A successfully refreshed from Google Patents.
Patent US3307360A successfully refreshed from Google Patents.
US3307360A
Expired / Lapsed
US
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Method of subsurface irrigation and system therefor
Assignee: Variperm Co
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Filing: 1964-05-11
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Granted: 1967-03-07
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Florent H Bailly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:27
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A SUBSURFACE IRRIGATION SYSTEM FOR A PLOT OF SOIL COMPRISING: STRATA OF VARIABLE PERMEABILITY LAYERS DISPOSED BELOW THE SURFACE OF THE SOIL, THE STRATA INCLUDING A FIRST LAYER OF LOW PERMEABILITY CONCRETE, THE STRATA INCLUDING TWO LAYERS DEFINING AN UPPERMOST LAYER AND A LOWERMOST LAYER OF HIGH PERMEABILAITY CONCRETE SANDWICHING THE LOW PERMEABILITY CONCRETE, THE SAID TWO LAYERS HAVING A PERMEABILITY HIGHER THAN THE SAID FIRST LAYER, A SOURCE OF WATER DIRECTED TOWARD THE UPPERMOST LAYER OF CONCRETE, A WATER COLLECTING DEVICE ENGAGED WITH THE LOWERMOST LAYER OF CONCRETE, AND A MEANS FOR RECIRCULATING WATER OPERATIVELY ENGAGED TO THE WATER SOURCE AND THE WATER COLLECTING DEVICE.
Claim 2
Dependent Claim
106 words
A SUBSURFACE IRRIGATION SYSTEM FOR A PLOT OF SOIL COMPRISING: STRATA OF VARIABLE PERMEABILITY LAYERS DISPOSED BELOW THE SURFACE OF THE SOIL, THE STRATA INCLUDING A FIRST LAYER OF LOW PERMEABILITY CONCRETE, THE STRATA INCLUDING TWO LAYERS DEFINING AN UPPERMOST LAYER AND A LOWERMOST LAYER OF HIGH PERMEABILAITY CONCRETE SANDWICHING THE LOW PERMEABILITY CONCRETE, THE SAID TWO LAYERS HAVING A PERMEABILITY HIGHER THAN THE SAID FIRST LAYER, A SOURCE OF WATER DIRECTED TOWARD THE UPPERMOST LAYER OF CONCRETE, A WATER COLLECTING DEVICE ENGAGED WITH THE LOWERMOST LAYER OF CONCRETE, AND A MEANS FOR RECIRCULATING WATER OPERATIVELY ENGAGED TO THE WATER SOURCE AND THE WATER COLLECTING DEVICE.
References Cited (Backward Citations)
US728088A
Cited
US1171558A
Cited
US1171559A
Cited
US1401386A
Cited
US2067356A
Cited
US2075590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |