Patent US2474760A successfully refreshed from Google Patents.
US2474760A
Expired / Lapsed
US
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Automatic ventilator
Assignee: Individual
•
Filing: 1946-03-29
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Granted: 1949-06-28
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Expires: 1966-03-29
Abstract
No abstract record available.
Inventors
- 👤 George J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:05
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US547356A
Cited
US997947A
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US1358193A
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US1488345A
Cited
US2012527A
Cited
US2074024A
Cited
US2117529A
Cited
US2354466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |