US2685288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen regulating system
Assignee: JOHNSON FARE BOX CO
•
Filing: 1949-11-17
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Granted: 1954-08-03
•
Expires: 1969-11-17
Abstract
No abstract record available.
Inventors
- 👤 George C Fields
- 👤 Thomas H Reddington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:13
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/14; A62B9/00; A62B9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US439093A
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US851830A
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US988352A
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US1926069A
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DE645056C
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GB478412A
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US2378047A
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US2384669A
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US2552595A
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US2608971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |