Patent US4722750A successfully refreshed from Google Patents.
US3461675A
Expired / Lapsed
US
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Watering and drainage system
Assignee: Individual
•
Filing: 1967-08-18
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Granted: 1969-08-19
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Expires: 1987-08-18
Abstract
No abstract record available.
Inventors
- 👤 James Paterson Izatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:16
CPC Classifications
E; E02; E02B; E02B11/00; E01; E01C; E01C13/00; E01C13/08; E01C13/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1171558A
Cited
US1171559A
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US1200869A
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US1591453A
Cited
US3156490A
Cited
US3256693A
Cited
US3336755A
Cited
US3307360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |