Patent US4269048A successfully refreshed from Google Patents.
Patent US2724693A successfully refreshed from Google Patents.
US2724693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid fire extinguishing composition
Assignee: Specialties Development Corp
•
Filing: 1952-12-05
•
Granted: 1955-11-22
•
Expires: 1972-12-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles Anthony
- 👤 Jr Robert Thomann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:29
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0028; A62D1/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A FIRE EXTINGUISHING COMPOSITION SERVICEABLE AT ABOUT -65* F. CONSISTING ESSENTIALLY OF A WATER SOLUTION OF BETWEEN 40% AND 45% BY WEIGHT ZINC CHLORIDE AND BETWEEN 20% AND 30% BE WEIGHT AMMONIUM SULFAMATE, SAID SOLUTION CONTAINING BETWEEN 60% AND 70% BY WEIGHT OF SAID MATERIALS.
Claim 2
Dependent Claim
45 words
A FIRE EXTINGUISHING COMPOSITION SERVICEABLE AT ABOUT -65* F. CONSISTING ESSENTIALLY OF A WATER SOLUTION OF BETWEEN 40% AND 45% BY WEIGHT ZINC CHLORIDE AND BETWEEN 20% AND 30% BE WEIGHT AMMONIUM SULFAMATE, SAID SOLUTION CONTAINING BETWEEN 60% AND 70% BY WEIGHT OF SAID MATERIALS.
References Cited (Backward Citations)
US2526462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |