Patent US3438575A successfully refreshed from Google Patents.
US3438575A
Expired / Lapsed
US
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Root controlled watering device
Assignee: Individual
•
Filing: 1967-05-24
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Granted: 1969-04-15
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Expires: 1987-05-24
Abstract
No abstract record available.
Inventors
- 👤 Hermann Rohling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:03
CPC Classifications
A; A01; A01G; A01G27/00; A01G27/006; A01G27/003
Claims Analysis
Total Claims: 0
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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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |