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US2917696A
Expired / Lapsed
US
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Electronic regulating circuits provided with feed-back of output to input
Assignee: Hagan Chemicals and Controls Inc
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Filing: 1953-04-10
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Granted: 1959-12-15
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Expires: 1973-04-10
Abstract
No abstract record available.
Inventors
- 👤 Michaels Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:17
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2154375A
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US2398421A
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US2446563A
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US2429466A
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US2503880A
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US2622192A
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US2685000A
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US2737547A
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US2798905A
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US2694114A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |