Patent US2811211A successfully refreshed from Google Patents.
US2811211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for storing foam liquid in fire extinguishers
Assignee: Pumpindustri AB
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Filing: 1956-05-15
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Granted: 1957-10-29
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Expires: 1976-05-15
Abstract
No abstract record available.
Inventors
- 👤 Eriksson Lars Gustav Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:08
CPC Classifications
A; A62; A62C; A62C5/00; A62C5/002
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
A FIRE EXTINGUISHING APPARATUS COMPRISING A PRESSURE VESSEL; A FOAM LIQUID OF SPECIFIC GRAVITY 1.15-1.2 FILLING THE MAJOR PART OF SAID VESSL; A COMPARATIVELY THIN LAYER OF A SEPARATING LIQUID OF SPECIFIC GRAVITY 1/2.15 FLOATING ON TOP OF SAID HEAVIER FOAM LIQUID, SAID SEPARATION LIQUID BEING INSOLUBLE IN WATER OR IN SAID FOAM LIQUID; A LAYER OF WATER UNDER PRESSURE FLOATING ON TOP OF SAID SEPATATING LIQUID, AND MEANS FOR MIXING SAID FOAM LIQUID WITH WATER UNDER PRESSURE ON THE OUTSIDE OF SAID VESSEL.
References Cited (Backward Citations)
US1085006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |