US2310022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen delivering apparatus of the demand type
Assignee: Airco Inc
•
Filing: 1941-04-10
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Granted: 1943-02-02
•
Expires: 1961-04-10
Abstract
No abstract record available.
Inventors
- 👤 Jay A Heidbrink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:15
CPC Classifications
A; A62; A62B; A62B9/00; A62B9/02; A62B9/022; A62B7/00; A62B7/12; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-02-01 | 1946-08-03 | 1947-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-01 | 1950-08-03 | 1951-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-01 | 1954-08-03 | 1955-02-02 | $7700.00 | Window Closed / Lapsed |