US2857971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguisher
Assignee: Ferris Products Co Inc
•
Filing: 1955-05-16
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Granted: 1958-10-28
•
Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Edmund A Ferris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:03
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/003; A62C35/00; A62C35/02; A62C35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A FIRE EXTINGUSHING DEVICE COMPRISING AN ELONGATED TUBE CLOSED AT BOTH ENDS AND CONTAINING A LOW BOILING POINT LIQUID FIRE EXTINGUISHING AGENT, ONE OF SAID ENDS BEING CLOSED WITH A FUSIBLE PLUG, AND AN INSULATING BARRIER LAYER OF A THIN SYNTHETIC RESINOUS FILM INSOLUBLE IN SAID LIQUID AGENT AND IMPERMEABLE TO THE VAPORS OF SAID AGENT IMPOSED BETWEEN SAID PLUG AND SIA D LIQUID AGENT.
Claim 2
Dependent Claim
65 words
A FIRE EXTINGUSHING DEVICE COMPRISING AN ELONGATED TUBE CLOSED AT BOTH ENDS AND CONTAINING A LOW BOILING POINT LIQUID FIRE EXTINGUISHING AGENT, ONE OF SAID ENDS BEING CLOSED WITH A FUSIBLE PLUG, AND AN INSULATING BARRIER LAYER OF A THIN SYNTHETIC RESINOUS FILM INSOLUBLE IN SAID LIQUID AGENT AND IMPERMEABLE TO THE VAPORS OF SAID AGENT IMPOSED BETWEEN SAID PLUG AND SIA D LIQUID AGENT.
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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) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |