Patent US2677385A successfully refreshed from Google Patents.
US2677385A
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Regulating apparatus providing proportional band regulation with automatic reset andrate of action response to input signal
Assignee: Hagan Corp
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Filing: 1950-04-26
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Granted: 1954-05-04
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Expires: 1970-04-26
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Markson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:26
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/18; G05B; G05B11/00; G05B11/44; G05B11/58; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2073838A
Cited
US2247056A
Cited
GB536537A
Cited
US2304783A
Cited
US2505981A
Cited
US2633858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |