Patent US3011422A successfully refreshed from Google Patents.
US3011422A
Expired / Lapsed
US
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Ventilating device
Assignee: Individual
•
Filing: 1959-07-02
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Granted: 1961-12-05
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Expires: 1979-07-02
Abstract
No abstract record available.
Inventors
- 👤 Frank J Scallon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:54
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/075; F24F13/08; F24F13/082; F24F13/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |