US3302408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sub-surface soil irrigators
Assignee: Individual
•
Filing: 1964-02-13
•
Granted: 1967-02-07
•
Expires: 1984-02-13
Abstract
No abstract record available.
Inventors
- 👤 Howard C Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A SUB-SURFACE SOIL IRRIGATOR COMPRISING A PLASTIC PIPE HAVING TINY HOLES DRILLED RADIALLY THROUGH ITS WALLS FOR ITS ENTIRE LENGTH, SAID HOLES COVERED WITH LOOSE, PLASTIC PATCHES, THE ENTIRE PIPE BEING COVERED WITH A BLANKET OF FINE GLASS FIBERS FIRMLY HELD BY FIBER GLASS WINDOW SCREEN BOUND WITH SPIRALLY WOUND PLASTIC COATED GALVANIZED STEEL WIRE.
Claim 2
Dependent Claim
55 words
A SUB-SURFACE SOIL IRRIGATOR COMPRISING A PLASTIC PIPE HAVING TINY HOLES DRILLED RADIALLY THROUGH ITS WALLS FOR ITS ENTIRE LENGTH, SAID HOLES COVERED WITH LOOSE, PLASTIC PATCHES, THE ENTIRE PIPE BEING COVERED WITH A BLANKET OF FINE GLASS FIBERS FIRMLY HELD BY FIBER GLASS WINDOW SCREEN BOUND WITH SPIRALLY WOUND PLASTIC COATED GALVANIZED STEEL WIRE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |