Patent US2440468A successfully refreshed from Google Patents.
US2440468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window ventilator
Assignee: Individual
•
Filing: 1945-02-08
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Granted: 1948-04-27
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Expires: 1965-02-08
Abstract
No abstract record available.
Inventors
- 👤 John C Gerken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:21
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; E06B7/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US949632A
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US1182749A
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US1241660A
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US1409050A
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US1482915A
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US1838207A
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US1650946A
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US1785682A
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US2265881A
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US2340570A
Cited
US2356325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |