US3518831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for subterranean irrigation
Assignee: Dawson Alexander Inc
•
Filing: 1967-11-02
•
Granted: 1970-07-07
•
Expires: 1987-11-02
Abstract
No abstract record available.
Inventors
- 👤 Edward Camp Tibbals Jr
- 👤 Robert J Miosek
- 👤 John M Stechman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:43
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7792
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US780986A
Cited
US824426A
Cited
US2445717A
Cited
US2674490A
Cited
US3046747A
Cited
US3048032A
Cited
US3200539A
Cited
US3308798A
Cited
US3419038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |