US3591343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency oxygen apparatus
Assignee: MSA Safety Inc
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Filing: 1968-10-29
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Granted: 1971-07-06
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Expires: 1988-10-29
Abstract
Abstract CONNECTED WITH THE OUTLET OF AN OXYGEN STORAGE TANK IS A PRESSURE REDUCER VALVE THAT HAS AN OUTLET FOR CONNECTION WITH THE DEMAND VALVE OF A BREATHING MASK. FOR CHARGING THE TANK WITH OXYGEN FROM A PRIMARY OXYGEN SUPPLY SYSTEM, THERE IS A CONDUIT PROVIDED WITH A CHECK VALVE PERMITTING FLOW ONLY TOWARD THE TANK. AN OXYGEN PRODUCING CANDLE IS IN A RECEPTACLE CONNECTED BY A CONDUIT WITH THE TANK, AND MANUALLY OPERBLE MENAS IS PROVIDED FOR IGNITING THE CANDLE TO GENERATE ADDITIONAL OXYGEN FOR THE TANK. ANOTHER CANDLE RECEPTACLE ALSO IS CONNECTED WITH THE TANK, AND THERE ARE MEANS FOR IGNITING IT FOLLOWED BY AUTOMATIC IGNITION OF THE OTHER CANDLE.
Inventors
- 👤 Miles J Mcgoff
- 👤 John W Mausteller
- 👤 John C King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:36
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/06; A62; A62B; A62B21/00
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |