US3333422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subirrigation conduit
Assignee: Individual
•
Filing: 1965-08-30
•
Granted: 1967-08-01
•
Expires: 1985-08-30
Abstract
No abstract record available.
Inventors
- 👤 William M Neyland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:27
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A CONDUIT STRUCTURE FORMED OF PLASTIC COMPRISING AN ELONGATED TUBULAR MEMBER HAVING AN ELONGATED WALL PORTION RIB EXTENDING ALONG ITS LENGTH AND BEING OF GREATER WALL THICKNESS THAN THE REMAINDER OF SAID TUBULAR MEMBER, A SERIES OF OPENINGS EXTENDING THROUGH SAID RIB AND A FLANGE EXTENDING OUTWARDLY FROM SAID RIB SO AS TO PROVIDE A STRUCTURE OF GREAT DIMENSIONAL STABILITY.
Claim 2
Dependent Claim
60 words
A CONDUIT STRUCTURE FORMED OF PLASTIC COMPRISING AN ELONGATED TUBULAR MEMBER HAVING AN ELONGATED WALL PORTION RIB EXTENDING ALONG ITS LENGTH AND BEING OF GREATER WALL THICKNESS THAN THE REMAINDER OF SAID TUBULAR MEMBER, A SERIES OF OPENINGS EXTENDING THROUGH SAID RIB AND A FLANGE EXTENDING OUTWARDLY FROM SAID RIB SO AS TO PROVIDE A STRUCTURE OF GREAT DIMENSIONAL STABILITY.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |