US3609074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-extinguishing compositions comprising 1,2-dibromo-tetrafluoroethane
Assignee: Montedison SpA
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Filing: 1969-05-26
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Granted: 1971-09-28
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Expires: 1989-05-26
Abstract
Abstract Flame-extinguishing foam-forming composition containing 5-25 percent by weight of a bromine-containing halogen-saturated alkane of low carbon number (C1 to C6), preferably symmetrical 1,2-dibromotetrafluoroethane. The composition also contains substances conventional in foaming, liquid, flame-extinguishing compositions, e.g., water, emulsifiers or foam-stabilizing surface-active agents, propellants, antifreezing liquids, corrosion inhibitors, buffer substances, thickening and carrying agents.
Inventors
- 👤 Nicolino Rainaldi
- 👤 Pierluigi Fatutto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:07
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0071
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A flame-extinguishing foam-forming composition consisting essentially of 7 to 15 percent by weight sym-C2F4Br2, water, at least one foaming agent selected from the group which consists of nitrogen, carbon dioxide and sulfurhexafluoride, an emulsifying agent selected from the group which consists of organic sulfonates, organic sulfates, alkylarylpolyethylene glycol ethers, esters of sorbitol with lauric, stearic or palmitic acid, and sodium and ammonium salts of sulfocarboxylic acids, an antifreeze substance selected from the group which consists of ethylene glycol and propylene glycol, at least one compound selected from the group which consists of alkali-metal nitrites, phosphates and polyphosphates and triethanolamine, said composition further including a fluorochloroalkane propellant.
Claim 2
Dependent Claim
12 words
The composition defined in claim 2 wherein said propellant is a chlorofluoromethane.
Claim 3
Dependent Claim
79 words
A flame-extinguishing foam-forming composition consisting essentially of 140 parts by weight of a 30 percent aqueous solution of the sodium salt of laurilic ether sulfate, 120 parts by weight of ethylene glycol, 1.5 parts by weight of sodium nitrite, 6.5 parts by weight NaH2PO4, 65 parts by weight CCl2F2, 55 parts by weight CHClF2, 100 parts by weight of symmetrical C2F4Br2, 70 parts by weight of a 30 percent aqueous solution of potassium silicate, 442 parts by weight water.
Claim 4
Dependent Claim
68 words
A flame-extinguishing foam-forming composition consisting essentially of 140 parts by weight of a 30 percent aqueous solution of the sodium salt of laurilic ether sulfate, 65 parts by weight of CCl2F2, 55 parts by weight CHClF2, 100 parts by weight of symmetrical C2F4Br2, 70 parts by weight of a 30 percent aqueous solution of potassium silicate, 120 parts by weight urea, and 450 parts by weight of water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |