US3543437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for removing roots and other material from hydroponic beds
Assignee: Pan American Hydroponics Inc
•
Filing: 1968-05-31
•
Granted: 1970-12-01
•
Expires: 1988-05-31
Abstract
No abstract record available.
Inventors
- 👤 Floyd C Gaines Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:42
CPC Classifications
A; A01; A01G; A01G31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1229022A
Cited
US2198150A
Cited
US2295004A
Cited
US2814161A
Cited
US3365840A
Cited
US3292198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |