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Patent US2813690A successfully refreshed from Google Patents.
US2813690A
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Emergency oxygen supply system
Assignee: Bendix Aviation Corp
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Filing: 1952-03-07
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Granted: 1957-11-19
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Expires: 1972-03-07
Abstract
No abstract record available.
Inventors
- 👤 Bradford B Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:30
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/02; A62B7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1298500A
Cited
GB501236A
Cited
US2384669A
Cited
US2523906A
Cited
US2583502A
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US2602608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |