US3500074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fail-safe controller
Assignee: Texas Instruments Inc
•
Filing: 1966-08-15
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Granted: 1970-03-10
•
Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Robert E Obenhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:14
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; H; H02; H02H; H02H5/00; H02H5/04; H02H5/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3182201A
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US3196286A
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US3195033A
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US3136877A
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US3310714A
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US3328606A
Cited
US3343036A
Cited
US3379939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |