US4194979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry chemical fire extinguishing powder containing alkali metal gluconate
Assignee: Individual
•
Filing: 1978-04-27
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Granted: 1980-03-25
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Expires: 1998-04-27
Abstract
Abstract Alkali metal salts, particularly the potassium salt, of gluconic acid or its stereoisomers have been found to be particularly useful as active ingredients of dry chemical fire extinguishers and can be used alone, or with a small amount of flowing agent and hydrophobic agent or in combination with other dry chemical extinguisher powders, such as sodium bicarbonate, ammonium phosphate and ammonium sulfates. These gluconates are stable, non-hygroscopic and have a high flame extinguishing effect.
Inventors
- 👤 Harald Gottschall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:05
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0007; A62D1/0014
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
A dry chemical fire extinguishing powder comprising as an active ingredient thereof a significant content of a substance selected from the group consisting of alkali salts of gluconic acid and its stereoisomers, the remainder, if any, of said powder, other than active ingredients and inert materials, consisting of at least one material selected from the group consisting of flowing agents and hydrophobic agents.
Claim 2
Dependent Claim
63 words
A dry chemical fire extinguishing powder comprising as an active ingredient thereof a significant content of a substance selected from the group consisting of alkali salts of gluconic acid and its stereoisomers, the remainder, if any, of said powder, other than active ingredients and inert materials, consisting of at least one material selected from the group consisting of flowing agents and hydrophobic agents.
Claim 3
Dependent Claim
54 words
A dry chemical fire extinguishing powder as defined in claim 1, in which said content of one or more alkali salts of one or more organic acids selected from the group consisting of gluconic acid and its stereoisomers constitutes the principal active ingredient of said powder and forms at least 5% by weight thereof.
Claim 4
Dependent Claim
40 words
A dry chemical fire extinguishing powder as defined in claim 1, in which said content of alkali salt of one or more organic acids selected from the group consisting of gluconic acid and its stereoisomers consists essentially of potassium gluconate.
Claim 5
Dependent Claim
40 words
A dry chemical fire extinguishing powder as defined in claim 2, in which said content of alkali salt of one or more organic acids selected from the group consisting of gluconic acid and its stereoisomers consists essentially of potassium gluconate.
Claim 6
Dependent Claim
37 words
A dry chemical fire extinguishing powder as defined in claim 1, containing also as active ingredient one or more substances selected from the group consisting of ammonium phosphate, ammonium sulfate, ammonium chloride, sodium carbonate and sodium bicarbonate.
Claim 7
Dependent Claim
37 words
A dry chemical fire extinguishing powder as defined in claim 2, containing also as active ingredient one or more substances selected from the group consisting of ammonium phosphate, ammonium sulfate, ammonium chloride, sodium carbonate and sodium bicarbonate.
Claim 8
Dependent Claim
37 words
A dry chemical fire extinguishing powder as defined in claim 3, containing also as active ingredient one or more substances selected from the group consisting of ammonium phosphate, ammonium sulfate, ammonium chloride, sodium carbonate and sodium bicarbonate.
Claim 9
Dependent Claim
37 words
A dry chemical fire extinguisher powder as defined in claim 4, containing also as active ingredient one or more substances selected from the group consisting of ammonium phosphate, ammonium sulfate, ammonium chloride, sodium carbonate and sodium bicarbonate.
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) | 1983-03-25 | 1983-09-24 | 1984-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-25 | 1987-09-24 | 1988-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-25 | 1991-09-24 | 1992-03-25 | $7700.00 | Window Closed / Lapsed |