US2852022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined air cooling humidifying apparatus for oxygen tents
Assignee: MODERN HOSPITAL EQUIPMENT Inc
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Filing: 1952-11-10
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Granted: 1958-09-16
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Expires: 1972-11-10
Abstract
No abstract record available.
Inventors
- 👤 Loyal G Netteland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:54
CPC Classifications
A; A61; A61G; A61G10/00; A61G10/04; F; F24; F24F; F24F1/00; F24F1/02; F24F1/032; F24F1/0323; F24F1/037; F24F6/00; F24F6/02; F24F6/06; A61M; A61M2205/00; A61M2205/36; A61M2205/3606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1669971A
Cited
US2123742A
Cited
US1976228A
Cited
US2143628A
Cited
US2531506A
Cited
GB679265A
Cited
US2677253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |