US2544182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator
Assignee: AIROLITE Co
•
Filing: 1948-03-25
•
Granted: 1951-03-06
•
Expires: 1968-03-25
Abstract
No abstract record available.
Inventors
- 👤 Marion G Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:24
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1403054A
Cited
US2105891A
Cited
US1922159A
Cited
US1871035A
Cited
US2133113A
Cited
US2119803A
Cited
US2459983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |