Patent US2948233A successfully refreshed from Google Patents.
US2948233A
Expired / Lapsed
US
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Evaporative cooler
Assignee: Individual
•
Filing: 1957-07-02
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Granted: 1960-08-09
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Expires: 1977-07-02
Abstract
No abstract record available.
Inventors
- 👤 Scharfe Emil Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:33
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/06; G; G06; G06G; G06G7/00; G06G7/12; G06G7/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US265246A
Cited
US1472051A
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US1708600A
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US2093408A
Cited
US2235116A
Cited
US2382688A
Cited
US2592896A
Cited
US2778203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |