Patent FR605067A successfully refreshed from Google Patents.
Patent US3391275A successfully refreshed from Google Patents.
US3391275A
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US
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Apparatus for regulating a variable output in accordance with a reference value
Assignee: 3M Co
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Filing: 1963-10-11
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Granted: 1968-07-02
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Expires: 1983-10-11
Abstract
No abstract record available.
Inventors
- 👤 Earl R Bullock
- 👤 Jerome D Heibel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:39
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/32; G05B1/00; G05B1/01; G05B1/03
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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |