US3432965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroponics apparatus
Assignee: CHARLES M SMITH
•
Filing: 1966-07-05
•
Granted: 1969-03-18
•
Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Charles M Smith
- 👤 Robert V Wilson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:34
CPC Classifications
A; A01; A01G; A01G31/00; A01G31/02; A01G31/04; A01G31/045; Y; Y02; Y02P; Y02P60/00; Y02P60/20; Y02P60/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE301474C
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US688740A
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US1793626A
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US2244677A
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US2917867A
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US3276163A
Cited
US3327425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |