Patent US3479575A successfully refreshed from Google Patents.
US3479575A
Expired / Lapsed
US
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Indicating device for a battery charging system
Assignee: ZF International UK Ltd
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Filing: 1967-03-10
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Granted: 1969-11-18
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Expires: 1987-03-10
Abstract
Abstract Transistor circuits for illuminating a warning lamp on a road vehicle when the generator is not producing an output. The transistor can be in series with the warning lamp and turned off when the generator produces an output, or in parallel with the warning lamp and turned on to short-circuit the warning lamp when the generator produces an output.
Inventors
- 👤 Maurice James Wright
- 👤 Roger William Nolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:58
CPC Classifications
G; G09; G09B; G09B25/00; G09B25/02; H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3210727A
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US3308306A
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US3321754A
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US3336519A
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US3417309A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |