US3721299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual dry chemical fire extinguisher
Assignee: Chevron USA Inc
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Filing: 1971-05-03
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Granted: 1973-03-20
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Expires: 1991-05-03
Abstract
Abstract A PORTABLE CHEMICAL FIRE EXTINGUISHER IS DISCLOSED WHICH COMPRISES TWO CONTAINERS, EACH CARRYING A DRY CHEMICAL FIRE EXTINGUISHING POWDER, CONNECTED TOGETHER TO FORM A UNITARY, BACK-CARRIED, EXTINGUISHER. THE TWO CONTAINERS FEED A SINGLE DISCHARGE MANIFOLD SO THAT THEY MAY BE DISCHARGED THROUGH A SINGLE HOSE AND PISTOL GRIP NOZZLE. A PROPELLANT GAS CARTRIDGE IS CONNECTED TO THE TWO CONTAINERS THROUGH A COMMON PRESSURE MANIFOLD TO PROVIDE EQUAL PRESSURE IN THE TANKS, WHEREBY BOTH DISCHARGE AT THE SAME TIME. THE PISTOL GRIP NOZZLE HAS A MODIFIED TRIGGER WHICH FACILITATES OPERATION OF THE EXTINGUISHER.
Inventors
- 👤 W Roessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:37
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/006
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |