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Patent US3492589A successfully refreshed from Google Patents.
US3492589A
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Failsafe circuit apparatus
Assignee: Honeywell Inc
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Filing: 1967-04-03
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Granted: 1970-01-27
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Expires: 1987-04-03
Abstract
No abstract record available.
Inventors
- 👤 Donald J Rotier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:25
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/14; H03D1/18; H03H; H03H9/00; H03H9/02; H03H9/125; H03K; H03K5/00; H03K5/22; H03K5/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3149243A
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US3252058A
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US3390387A
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US3210749A
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US3316353A
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US3381141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |