Patent US4402631A successfully refreshed from Google Patents.
US4402631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subsurface irrigation
Assignee: Individual
•
Filing: 1980-11-13
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Granted: 1983-09-06
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Expires: 2000-11-13
Abstract
Abstract A subsoil irrigation system comprising a flexible conduit with a longitudinal row of spaced outlet nozzles passing through the conduit and exteriorly protected by a flat having an edge secured to the conduit, a free edge with a bead, and wherein the conduit is formed on a slight curve so that when it is straightened in position underground the free edge of the flat will lie in intimate contact with the conduit to prevent the intrusion of foreign particulate matter in the nozzles.
Inventors
- 👤 Yuval Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:14
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A subsurface irrigation system comprising: an elongated flexible tubular conduit having a longitudinal outlet opening band, a protective flap extending longitudinally of said conduit and having a longitudinal edge secured to the conduit at one side of said outlet opening band, said flap overlying said outlet opening band, said flap having a free longitudinal edge opposite said secured edge and located at the other side of said outlet opening band from said secured longitudinal edge, and said conduit, in an unrestrained position, being curved, and when straightened, causing the free longitudinal edge of the protective flap to be biased against the conduit.
Claim 2
Dependent Claim
102 words
A subsurface irrigation system comprising: an elongated flexible tubular conduit having a longitudinal outlet opening band, a protective flap extending longitudinally of said conduit and having a longitudinal edge secured to the conduit at one side of said outlet opening band, said flap overlying said outlet opening band, said flap having a free longitudinal edge opposite said secured edge and located at the other side of said outlet opening band from said secured longitudinal edge, and said conduit, in an unrestrained position, being curved, and when straightened, causing the free longitudinal edge of the protective flap to be biased against the conduit.
References Cited (Backward Citations)
US953080A
Cited
US1058582A
Cited
US1350229A
Cited
US2536196A
Cited
US2563300A
Cited
US3080124A
Cited
US3292378A
Cited
US3333422A
Cited
US3779468A
Cited
US3966233A
Cited
US4247051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |