Patent US3439140A successfully refreshed from Google Patents.
US3439140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure gas operated switch with closed gas circuit
Assignee: BBC Brown Boveri AG Germany
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Filing: 1966-07-19
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Granted: 1969-04-15
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Expires: 1986-07-19
Abstract
No abstract record available.
Inventors
- 👤 Egbertus Adrianus Frowein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:31
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/80; H01H33/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN AN ELECTRICAL CIRCUIT BREAKER OF THE GAS-BLAST TYPE, THE COMBINATION COMPRISING MEANS ESTABLISHING A HIGH PRESSURE CHAMBER CONTAINING A PRESSURIZED GAS AND WITHIN WHICH ARE LOCATED A PAIR OF AXIALLY ALIGNED HOLLOW NOZZLED SHAPED CONTACT STUDS, SAID CONTACT STUDS BEING MOUNTED FOR RELATIVE MOVEMENT LONGITUDINALLY OF ONE ANOTHER TO CAUSE THEIR NOZZLE ENDS TO BECOME ENGAGED AND DISENGAGED, A GAS COLLECTION TUBE FOR EACH OF SAID CONTACT STUDS, EACH SAID TUBE BEING CLOSED AT ONE END AND HAVING THE OPPOSITE END THEREOF CONNECTED WITH THE END OF THE CORRESPONDING CONTACT STUD OPPOSITE THE NOZZLE SHAPED END THEREOF, DISENGAGEMENT OF SAID CONTACT STUDS EFFECTING A FLOW OF PRES-
Claim 2
Dependent Claim
108 words
IN AN ELECTRICAL CIRCUIT BREAKER OF THE GAS-BLAST TYPE, THE COMBINATION COMPRISING MEANS ESTABLISHING A HIGH PRESSURE CHAMBER CONTAINING A PRESSURIZED GAS AND WITHIN WHICH ARE LOCATED A PAIR OF AXIALLY ALIGNED HOLLOW NOZZLED SHAPED CONTACT STUDS, SAID CONTACT STUDS BEING MOUNTED FOR RELATIVE MOVEMENT LONGITUDINALLY OF ONE ANOTHER TO CAUSE THEIR NOZZLE ENDS TO BECOME ENGAGED AND DISENGAGED, A GAS COLLECTION TUBE FOR EACH OF SAID CONTACT STUDS, EACH SAID TUBE BEING CLOSED AT ONE END AND HAVING THE OPPOSITE END THEREOF CONNECTED WITH THE END OF THE CORRESPONDING CONTACT STUD OPPOSITE THE NOZZLE SHAPED END THEREOF, DISENGAGEMENT OF SAID CONTACT STUDS EFFECTING A FLOW OF PRES-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |