US3676066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process control
Assignee: Applied Automation Inc
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Filing: 1970-09-17
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Granted: 1972-07-11
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Expires: 1990-09-17
Abstract
Abstract A CHEMICAL PROCESS IN WHICH UNREACTED FEED CONSTITUENTS ARE RECYCLED, SUCH AS AMMONIA SYNTHESIS, IS CONTROLLED BY ESTABLISHING A FIRST SIGNAL REPRESENTATIVE OF THE RATIO OF TWO CONSTITUENTS FED TO A REACTOR. A SECOND SIGNAL IS ESTABLISHED WHICH IS REPRESENTATIVE OF THE DERIVATIVE OF THE FIRST SIGNAL. IN RESPONSE TO A COMBINATION OF THE FIRST AND SECOND SIGNALS, THE RATIO OF FEED CONSTITUENTS TO THE PROCESS IS CONTROLLED. D R A W I N G
Inventors
- 👤 Edward N Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:33
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0062; G01N33/0067; C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0482; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y10; Y10S; Y10S208/00; Y10S208/01; Y10T; Y10T436/00; Y10T436/12
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |