Patent US3105963A successfully refreshed from Google Patents.
US2711682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power roof ventilator
Assignee: ILG ELECTRIC VENTILATING CO
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Filing: 1951-08-04
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Granted: 1955-06-28
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Expires: 1971-08-04
Abstract
No abstract record available.
Inventors
- 👤 Fred E Drechsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; F24F7/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1230206A
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US2134142A
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US2157609A
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US2323178A
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US2297050A
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US2528902A
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US2490220A
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US2526290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |