Patent US3521212A successfully refreshed from Google Patents.
US3521212A
Expired / Lapsed
US
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Electric motor protection sensor
Assignee: Texas Instruments Inc
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Filing: 1968-06-21
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Granted: 1970-07-21
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Expires: 1988-06-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Waseleski Jr
- 👤 Francis P Buiting
- 👤 Lyle E Mcbride Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:34
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/02; H01C7/022; H02; H02K; H02K11/00; H02K11/20; H02K11/25
Claims Analysis
Total Claims: 0
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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) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |