Patent US3210749A successfully refreshed from Google Patents.
US3210749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flag warning circuit
Assignee: Collins Radio Co
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Filing: 1963-05-31
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Granted: 1965-10-05
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 Leslie A Magor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:31
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16504; G01R19/16509
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
WARNING CIRCUIT IN A SYSTEM HAVING TWO SEPARATE POWER SUPPLIES COMPRISING A TRANSISTOR, A WARNING MEANS CONNECTED IN THE COLLECTOR-EMITTER CIRCUIT OF THE TRANSISTOR, THE FIRST POWER SUPPLY CONNECTED TO THE COLLECTOR-EMITTER CIRCUIT OF THE TRANSISTOR, AND THE SECOND POWER SUPPLY CONNECTED TO THE BASE OF THE TRANSISTOR SO THAT THE TRANSISTOR IS DRIVEN TO CUT OFF WHEN EITHER OF THE POWER SUPPLIES ARE REMOVED.
Claim 2
Dependent Claim
65 words
WARNING CIRCUIT IN A SYSTEM HAVING TWO SEPARATE POWER SUPPLIES COMPRISING A TRANSISTOR, A WARNING MEANS CONNECTED IN THE COLLECTOR-EMITTER CIRCUIT OF THE TRANSISTOR, THE FIRST POWER SUPPLY CONNECTED TO THE COLLECTOR-EMITTER CIRCUIT OF THE TRANSISTOR, AND THE SECOND POWER SUPPLY CONNECTED TO THE BASE OF THE TRANSISTOR SO THAT THE TRANSISTOR IS DRIVEN TO CUT OFF WHEN EITHER OF THE POWER SUPPLIES ARE REMOVED.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |