Patent US2880719A successfully refreshed from Google Patents.
US2880719A
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US
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Lung ventilators and timing devices therefor
Assignee: Air Shields Inc
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Filing: 1955-01-31
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Granted: 1959-04-07
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Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Christian B Andreasen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0057; A61M16/0081; A61M16/0003; A61M16/0009; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2546; Y10T137/2549
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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |