Patent US2478132A successfully refreshed from Google Patents.
US3458951A
Expired / Lapsed
US
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Hydroculture grass unit
Assignee: IVAN Z MARTIN
•
Filing: 1967-03-31
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Granted: 1969-08-05
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Expires: 1987-03-31
Abstract
No abstract record available.
Inventors
- 👤 Ivan Z Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
A; A01; A01G; A01G31/00; A01G31/02; A01G31/06; A01G31/065; Y; Y02; Y02P; Y02P60/00; Y02P60/20; Y02P60/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1863914A
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US2051094A
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US2896374A
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US2897631A
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US2917867A
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US2928211A
Cited
US3101176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |