US3715438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Habitable combustion-suppressant atmosphere comprising air,a perfluoroalkane and optionally make-up oxygen
Assignee: Susquehanna Corp
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Filing: 1970-07-22
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Granted: 1973-02-06
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Expires: 1990-07-22
Abstract
Abstract D R A W I N G HABITABLE ATMOSPHERES WHICH DO NOT SUSTAIN COMBUSTION AND WHICH ARE CAPABLE OF SUSTAINING MAMMALIAN LIFE, CONSISTING ESSENTIALLY OF AIR, A PERFLUOROALKANE GAS, WHICH IS CARBON TETRAFLUORIDE (CF4), HEXAFLUOROETHANE (C2F6), OCTAFLUOROPROPANE (C3F8), OR MIXTURES THEREOF, AND MAKEUP OXYGEN, AS REQUIRED, TO PROVIDE, TOGETHER WITH THE XOYGEN PRESENT IN THE AIR, SUFFICIENT TOTAL OXYGEN TO SUSTAIN MAMMALIAN LIFE. A METHOD FOR PREVENTING AND CONTROLLING FIRE IN ENCLOSED AIR-CONTAINING, MAMMALIAN-HABITABLE COMPARTMENTS COMPRISING INTRODUCING CF4, C2F6, C3F8, OR MIXTURES THEREOF, AND ADDITIONAL MAKE-UP OXYGEN AS REQUIRED.
Inventors
- 👤 C Huggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:48
CPC Classifications
A; A62; A62C; A62C99/00; A62C99/0009; A62C99/0018; A62D; A62D1/00; A62D1/0028; A62D1/0057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |