Patent US3436191A successfully refreshed from Google Patents.
US3436191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen generator
Assignee: MSA Safety Inc
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Filing: 1966-06-30
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Granted: 1969-04-01
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Expires: 1986-06-30
Abstract
No abstract record available.
Inventors
- 👤 Miles J Mcgoff
- 👤 Verne K Heckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:59
CPC Classifications
B; B01; B01J; B01J7/00; C; C01; C01B; C01B13/00; C01B13/02; C01B13/0296
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
AN OXYGEN GENERATOR COMPRISING A PRESSURE VESSEL PROVIDED WITH AN OXYGEN OUTLET, A PLURALITY OF OXYGEN GENERATING CANDLES DISPOSED THEREIN, AN IGNITER FOR EACH CANDLE, AND MEANS RESPONSIVE TO OXYGEN PRESSURE INSIDE SAID VESSEL FOR ACTIVATING A DIFFERENT IGNITER EVERY TIME SAID PRESSURE DROPS BELOW A PREDETERMINED MINIMUM, WHEREBY SAID CANDLES ARE BURNED IN SUCCESSION AS NEEDED.
Claim 2
Dependent Claim
57 words
AN OXYGEN GENERATOR COMPRISING A PRESSURE VESSEL PROVIDED WITH AN OXYGEN OUTLET, A PLURALITY OF OXYGEN GENERATING CANDLES DISPOSED THEREIN, AN IGNITER FOR EACH CANDLE, AND MEANS RESPONSIVE TO OXYGEN PRESSURE INSIDE SAID VESSEL FOR ACTIVATING A DIFFERENT IGNITER EVERY TIME SAID PRESSURE DROPS BELOW A PREDETERMINED MINIMUM, WHEREBY SAID CANDLES ARE BURNED IN SUCCESSION AS NEEDED.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |