Patent US2569979A successfully refreshed from Google Patents.
US2569979A
Expired / Lapsed
US
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Fire extinguishing liquids and process
Assignee: Pyrene Manufacturing Co
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Filing: 1947-07-16
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Granted: 1951-10-02
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Expires: 1967-07-16
Abstract
No abstract record available.
Inventors
- 👤 Charles G Durfee
- 👤 George E Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:26
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0028; A62D1/0057
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A FIRE EXTINGUISHING LIQUID WHICH COMPRISES AS ITS PRINCIPAL CONSTITUENTS A MIXTURE OF METHYLENE BROMIDE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BROMOFORM, LIQUID BROMINATED ETHANES AND LIQUID BROMINATED ETHYLENES, SAID LIQUID HAVING A BOILING POINT BETWEEN ABOUT 97* C. AND 140* C. AND A FREEZING POINT BELOW ABOUT -30* C.
Claim 2
Dependent Claim
53 words
A FIRE EXTINGUISHING LIQUID WHICH COMPRISES AS ITS PRINCIPAL CONSTITUENTS A MIXTURE OF METHYLENE BROMIDE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BROMOFORM, LIQUID BROMINATED ETHANES AND LIQUID BROMINATED ETHYLENES, SAID LIQUID HAVING A BOILING POINT BETWEEN ABOUT 97* C. AND 140* C. AND A FREEZING POINT BELOW ABOUT -30* C.
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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) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |