US2884847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator
Assignee: Individual
•
Filing: 1957-08-30
•
Granted: 1959-05-05
•
Expires: 1977-08-30
Abstract
No abstract record available.
Inventors
- 👤 William H Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:22
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; F24F11/00; F24F11/30; F24F11/32; F24F11/33; F24F11/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US624874A
Cited
US1222394A
Cited
US1850793A
Cited
US2328659A
Cited
US2317798A
Cited
US2551004A
Cited
US2814979A
Cited
US2825275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |