Patent US2943919A successfully refreshed from Google Patents.
US2943919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting combustible gas
Assignee: Individual
•
Filing: 1957-01-16
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Granted: 1960-07-05
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Expires: 1977-01-16
Abstract
No abstract record available.
Inventors
- 👤 Berardi Vincenzo
- 👤 Manzari Giovanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:55
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/50; G01N25/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A SELF OPERATING SAFETY DEVICE FOR TESTING FOR THE PRESENCE OF COMBUSTIBLE GAS FOR USE IN CONJUCTION WITH GAS SUPPLY LINE HAVING AN ELECTRICALLY OPERATED FLOW VALVE, A COMPRESSION CHAMBER HAVING INLET AND OUTLET PORTS, AN EXPANDABLE MEMBER COMPRISING A PORTION OF SAID CHAMBER, ELECTRICALLY OPERATED DIMULTANEOUSLY ACTUATED CLOSURE MEANS ASSOCIATED WITH SAID PORTS, AN ELECTRICALLY DRIVEN FAN FOR FILLING SAID CHAMBER WITH THE ATMOSPHERE TO BE TESTED, ELECTRICAL GAS IGNITION MEANS WITHIN SAID CHAMBER, FIRST SWITCH MEANS SEQUENTIALLY ACTIVATING SAID FAN, CLOSING SAID CLOSURE MEANS AND ACTIVATING SAID IGNITION MEANS TIMING MEANS OPERATING SAID FIRST SWITCH MEANS AT PRE-DETERMINED INTERVALS, SECOND SWITCH MEANS OPERABLY CONNECTED TO SAID EXPANDABLE MEMBER ADAPTED
Claim 2
Dependent Claim
112 words
IN A SELF OPERATING SAFETY DEVICE FOR TESTING FOR THE PRESENCE OF COMBUSTIBLE GAS FOR USE IN CONJUCTION WITH GAS SUPPLY LINE HAVING AN ELECTRICALLY OPERATED FLOW VALVE, A COMPRESSION CHAMBER HAVING INLET AND OUTLET PORTS, AN EXPANDABLE MEMBER COMPRISING A PORTION OF SAID CHAMBER, ELECTRICALLY OPERATED DIMULTANEOUSLY ACTUATED CLOSURE MEANS ASSOCIATED WITH SAID PORTS, AN ELECTRICALLY DRIVEN FAN FOR FILLING SAID CHAMBER WITH THE ATMOSPHERE TO BE TESTED, ELECTRICAL GAS IGNITION MEANS WITHIN SAID CHAMBER, FIRST SWITCH MEANS SEQUENTIALLY ACTIVATING SAID FAN, CLOSING SAID CLOSURE MEANS AND ACTIVATING SAID IGNITION MEANS TIMING MEANS OPERATING SAID FIRST SWITCH MEANS AT PRE-DETERMINED INTERVALS, SECOND SWITCH MEANS OPERABLY CONNECTED TO SAID EXPANDABLE MEMBER ADAPTED
References Cited (Backward Citations)
GB191019008A
Cited
US1977481A
Cited
US2170056A
Cited
US2508588A
Cited
US2581812A
Cited
GB693565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |