Patent US679962A successfully refreshed from Google Patents.
Patent US3071667A successfully refreshed from Google Patents.
US3071667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-type circuit interrupter
Assignee: General Electric Co
•
Filing: 1959-08-12
•
Granted: 1963-01-01
•
Expires: 1979-08-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:50
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/664; H01H33/6641; H01H33/6646
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN ALTERNATING CURRENT CIRCUIT INTERRUPTER OF THE VACUUM TYPE COMPRISING AN ENVELOPE EVACUATED TO A PRESSURE LOWER THAN 10-4MM. OF MERCURY, A PAIR OF SEPARABLE ELECTRODES DISPOSED WITHIN SAID EVACUATED ENVELOPE, MEANS FOR SEPARATING SAID ELECTRODES TO ESTABLISH AN INTERELECTRODE GAP ACROSS WHICH AN ALTERNATING CURRENT CIRCUIT INTERRUPTING ARC IS FORMED AND ACROSS WHICH A RECOVERY VOLTAGE TRANSIENT HAVING A PEAK VALUE OF AT LEAST 36 KILOVOLTS IS DEVELOPED IMMEDIATELY AFTER THE CURRENT ZERO POINT IS REACHED, MAGNETIC MEANS FOR PROVIDING DURING THE BUILD-UP OF SAID RECOVERY VOLTAGE TRANSIENT A MAGNETIC FIELD HAVING ITS MAGNETIC LINES OF FORCE EXTENDING TRANSVERSELY WITH RESPECT TO THE ELECTRIC LINES OF FORCE BETWEEN THE SEPARATED ELECTRODES, THE MINIMUM FLUX DENSITY OF SAID
Claim 2
Dependent Claim
118 words
AN ALTERNATING CURRENT CIRCUIT INTERRUPTER OF THE VACUUM TYPE COMPRISING AN ENVELOPE EVACUATED TO A PRESSURE LOWER THAN 10-4MM. OF MERCURY, A PAIR OF SEPARABLE ELECTRODES DISPOSED WITHIN SAID EVACUATED ENVELOPE, MEANS FOR SEPARATING SAID ELECTRODES TO ESTABLISH AN INTERELECTRODE GAP ACROSS WHICH AN ALTERNATING CURRENT CIRCUIT INTERRUPTING ARC IS FORMED AND ACROSS WHICH A RECOVERY VOLTAGE TRANSIENT HAVING A PEAK VALUE OF AT LEAST 36 KILOVOLTS IS DEVELOPED IMMEDIATELY AFTER THE CURRENT ZERO POINT IS REACHED, MAGNETIC MEANS FOR PROVIDING DURING THE BUILD-UP OF SAID RECOVERY VOLTAGE TRANSIENT A MAGNETIC FIELD HAVING ITS MAGNETIC LINES OF FORCE EXTENDING TRANSVERSELY WITH RESPECT TO THE ELECTRIC LINES OF FORCE BETWEEN THE SEPARATED ELECTRODES, THE MINIMUM FLUX DENSITY OF SAID
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |