US3090749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguisher compositions for metal fires
Assignee: Ansul Chemical Co
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Filing: 1959-01-30
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Granted: 1963-05-21
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Expires: 1979-01-30
Abstract
No abstract record available.
Inventors
- 👤 William R Warnock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:17
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/06; A62D; A62D1/00; A62D1/0007; A62D1/0014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A POWDERED FREE-FLOWING FIRE EXTINGUISHING COMPOSITION FOR EXTINGUISHING LIGHT METAL FIRES AND DISCHARGEABLE AS A STREAM FROM AN EXTINGUISHER UNDER PRESSURE WHICH COMPRISES, BY WEIGHT, 85 TO 95 PERCENT OF AN AGENT SELECTED FROM THE GROUP CONSISTING OF POWDERED BAKED CARBON AND SYNTHETIC GRANULAR GRAPHITE AND ABOUT 5 TO 15 PERCENT OF AN ANTI-CAKING AGENT WHICH IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF ATTAPULGUS CLAY, TALC ADSORPTIVE MAGNESIUM SILICATE, BENTONITE AND DIATOMACEOUS EARTH, THE COMPOSITION HAVING A PARTICLE SIZE RANGE SUCH THAT SUBSTANTIALLY ALL OF IT WILL PASS THROUGH A 20 MESH SIEVE AND NOT MORE THAN ABOUT 25 PERCENT WILL PASS THROUGH A 325 MESH SIEVE.
Claim 2
Dependent Claim
109 words
A POWDERED FREE-FLOWING FIRE EXTINGUISHING COMPOSITION FOR EXTINGUISHING LIGHT METAL FIRES AND DISCHARGEABLE AS A STREAM FROM AN EXTINGUISHER UNDER PRESSURE WHICH COMPRISES, BY WEIGHT, 85 TO 95 PERCENT OF AN AGENT SELECTED FROM THE GROUP CONSISTING OF POWDERED BAKED CARBON AND SYNTHETIC GRANULAR GRAPHITE AND ABOUT 5 TO 15 PERCENT OF AN ANTI-CAKING AGENT WHICH IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF ATTAPULGUS CLAY, TALC ADSORPTIVE MAGNESIUM SILICATE, BENTONITE AND DIATOMACEOUS EARTH, THE COMPOSITION HAVING A PARTICLE SIZE RANGE SUCH THAT SUBSTANTIALLY ALL OF IT WILL PASS THROUGH A 20 MESH SIEVE AND NOT MORE THAN ABOUT 25 PERCENT WILL PASS THROUGH A 325 MESH SIEVE.
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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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |