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Patent US4804482A successfully refreshed from Google Patents.
US4804482A
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Composition for extinguishing fires and fire retardant coating
Assignee: Individual
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Filing: 1987-11-06
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Granted: 1989-02-14
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Expires: 2007-11-06
Abstract
Abstract The present invention relates to a composition for extinguishing fire and for impregnating organic materials against combustion. The composition comprises an aqueous solution, a method of preparation of this composition and a method of extinguishing and impregnating organic material against combustion.
Inventors
- 👤 Harald W. Schuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:33
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0028; A62D1/0035; B; B27; B27K; B27K2200/00; B27K2200/10; B27K3/00; B27K3/16; B27K3/20; B27K3/34; B27K3/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A composition for extinguishing fires and impregnating organic material against combustion, which consists essentially of: an aqueous solution of 300-350 g/l citric acid and an equimolar amount of a sodium and potassium compound in a ratio of 0.6-1.0:100 (Na:K), said aqueous solution having a pH of 7.0-8.00.
Claim 2
Dependent Claim
47 words
A composition for extinguishing fires and impregnating organic material against combustion, which consists essentially of: an aqueous solution of 300-350 g/l citric acid and an equimolar amount of a sodium and potassium compound in a ratio of 0.6-1.0:100 (Na:K), said aqueous solution having a pH of 7.0-8.00.
Claim 3
Dependent Claim
61 words
A method of preparing the composition of claim 1 comprising: dissolving 300-350 g citric acid and an equimolar amount of a sodium and potassium compound in a ratio of 0.6-1.0:100 (Na:K) in an amount of water up to 1 liter, whereafter the pH is adjusted to 7.0-8.00 with citric acid or an alkali carbonate, or alkali hydrogen carbonate or alkali hydroxide.
Claim 4
Dependent Claim
35 words
A composition according to claim 1 wherein said sodium and potassium compound is selected from the group consisting of a sodium and potassium carbonate, sodium and potassium hydrogen carbonate and a sodium and potassium hydroxide.
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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) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-14 | 2000-08-15 | 2001-02-14 | $7700.00 | Window Closed / Lapsed |