US3566401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine warning circuit
Assignee: Caterpillar Inc
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Filing: 1968-07-29
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Granted: 1971-02-23
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Expires: 1988-07-29
Abstract
Abstract AN ELECTRICAL WARNING CIRCUIT FOR A VEHICULAR ENGINE ASSEMBLY HAVING SENSING SWITCHES RESPONSIVE TO VARIOUS OPERATING CONDITIONS AND SEAPARTE VISUAL SIGNAL MEANS ASSOCIATED WITH EACH OF THE SENSOR SWITCHES. TO DETERMINE IF THE SIGNAL MEANS ARE IN WORKING ORDER, TESTING MEANS ARE EFFECTIVE TO ACTUATE ALL OF THE SIGNAL MEANS AUTOMATICALLY DURING ENGINE STARTUP AND WHEN DESIRED DURING ENGINE OPERATION. A SINGLE AUDIBLE ALARM IS ACTUATED ALONG WITH ANY ONE OF THE SIGNAL MEANS IN RESPONSE TO ITS ASSOCIATED SENSOR SWITCH.
Inventors
- 👤 Kerwyn B Smith
- 👤 James W Thais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:38
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08; F01; F01L; F01L1/00; F01L2710/00; F01L2710/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |