Patent US2529040A successfully refreshed from Google Patents.
US2529040A
Expired / Lapsed
US
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Ventilating fan for windows
Assignee: HACKLEY MORRISON JR
•
Filing: 1945-08-03
•
Granted: 1950-11-07
•
Expires: 1965-08-03
Abstract
No abstract record available.
Inventors
- 👤 Morrison Hackley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:40
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2027647A
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US1971827A
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US1988810A
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US2010808A
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US2010809A
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US2036851A
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US2035653A
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US2154410A
Cited
US2298606A
Cited
US2385152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |