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US2972208A
Expired / Lapsed
US
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Frost preventer
Assignee: Individual
•
Filing: 1958-12-08
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Granted: 1961-02-21
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Expires: 1978-12-08
Abstract
No abstract record available.
Inventors
- 👤 Howard H Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:24
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1670626A
Cited
US2156405A
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US2369367A
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US2585081A
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US2663365A
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US2897885A
Cited
US2846816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |