US2812703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof ventilator
Assignee: UNO VENTILATOR Co
•
Filing: 1954-02-04
•
Granted: 1957-11-12
•
Expires: 1974-02-04
Abstract
No abstract record available.
Inventors
- 👤 Tobey Julien Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; F24F7/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2082955A
Cited
US2612831A
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US2571513A
Cited
US2668491A
Cited
US2641987A
Cited
US2638835A
Cited
FR1038918A
Cited
US2684621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |