US3479947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator unit
Assignee: CTB Inc
•
Filing: 1968-01-15
•
Granted: 1969-11-25
•
Expires: 1988-01-15
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:31
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/007; F24F7/013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2159498A
Cited
US2225349A
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DE709785C
Cited
US2580797A
Cited
US2571374A
Cited
FR1061261A
Cited
US2804008A
Cited
FR1162268A
Cited
US2950859A
Cited
US2933241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |