Patent US3444941A successfully refreshed from Google Patents.
US3444941A
Expired / Lapsed
US
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Automatic irrigator
Assignee: TRI MATIC Inc
•
Filing: 1966-06-09
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Granted: 1969-05-20
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Expires: 1986-06-09
Abstract
No abstract record available.
Inventors
- 👤 Rufus J Purtell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:59
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/09; A01G25/097
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US887911A
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US1079817A
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US1935295A
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US2475388A
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US2665169A
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US2750228A
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US2889948A
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US3155370A
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US3202172A
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US3349794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |