Patent US1835666A successfully refreshed from Google Patents.
Patent US2958658A successfully refreshed from Google Patents.
US2958658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam producing composition
Assignee: West Virginia Pulp and Paper Co
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Filing: 1955-04-01
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Granted: 1960-11-01
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Expires: 1975-04-01
Abstract
No abstract record available.
Inventors
- 👤 William A Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:59
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A FOAM PRODUCING COMPOSITION USEFUL FOR THE FIRE EXTINGUISHINEG, CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING LIGNIN SULFONATE DERIVED FROM THE SULFONATION OF PREVIOUSLY ISOLATED LIGNIN, AND HAVING FROM 1/2 TO 1 SULFONIC GROUP PER MOLECULE OF LIGNIN, SAID SOLUTION HAVING THE PROPERTY OF FORMING A FOAM HAVING FIRE EXTINGUISHING PROPERTIES WHEN MINGLED WITH GASEOUS, CO2, SAID SOLUTION BEING ASSOCIATED WITH A SOURCE OF CO2 WHICH IS UNRELEASED UNTIL THE MOMENT OF USE.
Claim 2
Dependent Claim
73 words
A FOAM PRODUCING COMPOSITION USEFUL FOR THE FIRE EXTINGUISHINEG, CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING LIGNIN SULFONATE DERIVED FROM THE SULFONATION OF PREVIOUSLY ISOLATED LIGNIN, AND HAVING FROM 1/2 TO 1 SULFONIC GROUP PER MOLECULE OF LIGNIN, SAID SOLUTION HAVING THE PROPERTY OF FORMING A FOAM HAVING FIRE EXTINGUISHING PROPERTIES WHEN MINGLED WITH GASEOUS, CO2, SAID SOLUTION BEING ASSOCIATED WITH A SOURCE OF CO2 WHICH IS UNRELEASED UNTIL THE MOMENT OF USE.
References Cited (Backward Citations)
GB289630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |