US3227631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic feed forward and feed backward process control system
Assignee: Phillips Petroleum Co
•
Filing: 1961-07-03
•
Granted: 1966-01-04
•
Expires: 1981-07-03
Abstract
No abstract record available.
Inventors
- 👤 Forrest D Stine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:00
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/44; G05B11/48; G05B11/50; B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/425; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A METHOD OF CONTROLLING A PROCESS WHICH COMPRISES MEASURING A FIRST OUTPUT PROCESS VARIABLE REPRESENTATIVE OF THE EFFECTIVENESS OF SAID PROCESS, ESTABLISHING AND TRANSMITTING A FIRST SIGNAL REPRESENTATIVE OF SAID MEASUREMENT AS INPUT A TO A COMPUTING ZONE, SAID COMPUTING ZONE SOLVING THE EQUATION
Claim 2
Independent Claim
44 words
A METHOD OF CONTROLLING A PROCESS WHICH COMPRISES MEASURING A FIRST OUTPUT PROCESS VARIABLE REPRESENTATIVE OF THE EFFECTIVENESS OF SAID PROCESS, ESTABLISHING AND TRANSMITTING A FIRST SIGNAL REPRESENTATIVE OF SAID MEASUREMENT AS INPUT A TO A COMPUTING ZONE, SAID COMPUTING ZONE SOLVING THE EQUATION
References Cited (Backward Citations)
US3126904A
Cited
US2464346A
Cited
US2511022A
Cited
US2837286A
Cited
US2900312A
Cited
US3018230A
Cited
US3020213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |