US5856587A
Expired / Lapsed
US
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Flame extinguishing compositions
Assignee: Syensqo Specialty Polymers Italy SpA
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Filing: 1997-03-05
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Granted: 1999-01-05
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Expires: 2017-03-05
Abstract
Abstract Extinguishing compositions comprising a liquid extinguishing agent constituted by hydrofluoropolyethers having general formula HF.sub.2 CO(CF.sub.2 O).sub.n (CF.sub.2 CF.sub.2 O).sub.m CF.sub.2 H wherein n and m are integers comprised between 0 and 20, excluding when m and m are contemporaneously 0 and having boiling point between 30° and 200° C. and having an O/C molar ratio between 0.5-1.
Inventors
- 👤 Mario Visca
- 👤 Gianfranco Spataro
- 👤 Giuseppe Marchionni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:18
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0028; A62D1/0057
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
Extinguishing compositions comprising a liquid extinguishing agent constituted by hydrofluoropolyethers having the formula HF.sub.2 CO(CF.sub.2 O).sub.n (CF.sub.2 CF.sub.2 O).sub.m CF.sub.2 H wherein n and m are integers comprised between 0 and 20, excluding when m and n are contemporaneously 0 and having a boiling point between 30° and 200° C., and having an O/C molar ration between 0.5-1 and further comprising a propellant.
Claim 2
Dependent Claim
63 words
Extinguishing compositions comprising a liquid extinguishing agent constituted by hydrofluoropolyethers having the formula HF.sub.2 CO(CF.sub.2 O).sub.n (CF.sub.2 CF.sub.2 O).sub.m CF.sub.2 H wherein n and m are integers comprised between 0 and 20, excluding when m and n are contemporaneously 0 and having a boiling point between 30° and 200° C., and having an O/C molar ration between 0.5-1 and further comprising a propellant.
Claim 3
Dependent Claim
20 words
Extinguishing compositions comprising a liquid extinguishing agent according to claim 1 having a boiling point between 60° and 150° C.
Claim 4
Dependent Claim
46 words
Extinguishing compositions according to claim 1 wherein the propellant is selected from the group consisting of an inert gas selected from the group consisting of nitrogen and helium and hydrofluorocarbons, hydrochlorofluorocarbons with exinguishing properties alone and in admixture with each other and/or with said inert gas.
Claim 5
Dependent Claim
28 words
Extinguishing compositions according to claim 4 wherein the hydrofluorocarbon with extinguishing properties utilized as propellant is selected from hydroflourocarbon (HFC) with a boiling temperature lower than 0° C.
Claim 6
Dependent Claim
26 words
Extinguishing compositions according to claim 4 wherein the hydrofluorocarbon is selected from the group consisting of: pentafluoroethane (HFC 125), heptafluoropropane (HFC 227) and hexafluoropropane (HFC 236).
Claim 7
Dependent Claim
24 words
Extinguishing compositions according to claim 1, wherein the detoxifying agent is selected from the group consisting of terpenes and unsaturated acids and mixtures thereof.
Claim 8
Independent Claim
70 words
A method for extinguishing a fire comprising contacting said fire with a composition comprising: hydrofluoropolyethers having the formula HF 2 CO(CF 2 O) n (CF 2 CF 2 O) m CF 2 H wherein n and m are integers comprised between 0 and 20, excluding when m and n are contemporaneously 0 and having a boiling point between 30° and 200° C. and having an O/C molar ratio between 0.5-1.
Claim 9
Independent Claim
70 words
A method for extinguishing a fire comprising contacting said fire with a composition comprising: hydrofluoropolyethers having the formula HF 2 CO(CF 2 O) n (CF 2 CF 2 O) m CF 2 H wherein n and m are integers comprised between 0 and 20, excluding when m and n are contemporaneously 0 and having a boiling point between 30° and 200° C. and having an O/C molar ratio between 0.5-1.
Claim 10
Dependent Claim
64 words
Extinguishing compositions comprising a liquid extinguishing agent constituted by hydrofluoropolyethers having the formula HF.sub.2 CO(CF.sub.2 O).sub.n (CF.sub.2 CF.sub.2 O).sub.m CF.sub.2 H wherein n and m are integers comprised between 0 and 20, excluding when m and n are contemporaneously 0 and having a boiling point between 30° and 200° C., and having an O/C molar ration between 0.5-1 and further comprising a detoxifying agent.
Claim 11
Dependent Claim
64 words
Extinguishing compositions comprising a liquid extinguishing agent constituted by hydrofluoropolyethers having the formula HF.sub.2 CO(CF.sub.2 O).sub.n (CF.sub.2 CF.sub.2 O).sub.m CF.sub.2 H wherein n and m are integers comprised between 0 and 20, excluding when m and n are contemporaneously 0 and having a boiling point between 30° and 200° C., and having an O/C molar ration between 0.5-1 and further comprising a detoxifying agent.
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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) | 2002-01-04 | 2002-07-06 | 2003-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-04 | 2006-07-06 | 2007-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-04 | 2010-07-06 | 2011-01-05 | $7700.00 | Window Closed / Lapsed |