Patent US3255384A successfully refreshed from Google Patents.
US3255384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit
Assignee: McGraw Edison Co
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Filing: 1963-01-11
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Granted: 1966-06-07
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Expires: 1983-01-11
Abstract
No abstract record available.
Inventors
- 👤 Richard E Riebs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:34
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/06; H02H3/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A PROTECTIVE DEVICE HAVING SWITCH MEANS DISPOSED IN AN ELECTRICAL SYSTEM, THE COMBINATION OF, SIGNAL MEANS FOR PRODUCING A FIRST ELECTRICAL SIGNAL UPON EACH OCCURRENCE AND DISAPPEARANCE OF A PREDETERMINED NUMBER OF ABNORMAL CIRCUIT CONDITIONS IN SAID SYSTEM AND A SECOND ELECTRICAL SIGNAL UPON THE NEXT SUCCEEDING OCCURRENCE AND DISAPPEARANCE OF SAID CONDITION AFTER SAID NUMBER, FIRST CIRCUIT MEANS CONNECTED TO SAID SIGNAL MEANS, SECOND CIRCUIT MEANS, INTERMEDIATE CIRCUIT MEANS CONNECTED TO SAID SIGNAL MEANS AND SAID SECOND CIRCUIT MEANS, SAID INTERMEDIATE CIRCUIT MEANS NORMALLY BEING OPERATIVE UPON THE OCCURRENCE OF AN ELECTRICAL SIGNAL TO ACTUATE SAID SECOND CIRCUIT MEANS, SAID FIRST CIRCUIT MEANS BEING RESPONSIVE TO SAID FIRST SIGNALS TO RENDER SAID INTERMEDIATE CIRCUIT MEANS INOPERABLE, SAID FIRST CIRCUIT MEANS BEING NON-
Claim 2
Dependent Claim
124 words
IN A PROTECTIVE DEVICE HAVING SWITCH MEANS DISPOSED IN AN ELECTRICAL SYSTEM, THE COMBINATION OF, SIGNAL MEANS FOR PRODUCING A FIRST ELECTRICAL SIGNAL UPON EACH OCCURRENCE AND DISAPPEARANCE OF A PREDETERMINED NUMBER OF ABNORMAL CIRCUIT CONDITIONS IN SAID SYSTEM AND A SECOND ELECTRICAL SIGNAL UPON THE NEXT SUCCEEDING OCCURRENCE AND DISAPPEARANCE OF SAID CONDITION AFTER SAID NUMBER, FIRST CIRCUIT MEANS CONNECTED TO SAID SIGNAL MEANS, SECOND CIRCUIT MEANS, INTERMEDIATE CIRCUIT MEANS CONNECTED TO SAID SIGNAL MEANS AND SAID SECOND CIRCUIT MEANS, SAID INTERMEDIATE CIRCUIT MEANS NORMALLY BEING OPERATIVE UPON THE OCCURRENCE OF AN ELECTRICAL SIGNAL TO ACTUATE SAID SECOND CIRCUIT MEANS, SAID FIRST CIRCUIT MEANS BEING RESPONSIVE TO SAID FIRST SIGNALS TO RENDER SAID INTERMEDIATE CIRCUIT MEANS INOPERABLE, SAID FIRST CIRCUIT MEANS BEING NON-
References Cited (Backward Citations)
US3127542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |