Patent US3237634A successfully refreshed from Google Patents.
US3237634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process control system
Assignee: —
•
Filing: —
•
Granted: 1966-03-01
•
Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:26
CPC Classifications
F; F15; F15B; F15B5/00; F15B5/003; F15B19/00; F15B19/005; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN A PROCESS CONTROL SYSTEM HAVING INPUT MEANS ADAPTED TO RECEIVE A FIRST SIGNAL REPRESENTATIVE OF A MEASURED QUANTITY, SET POINT MEANS TO ESTABLISH A SECOND SIGNAL OF PRESELECTED MAGNITUDE, AND FIRST MEANS TO COMPARE SAID FIRST AND SECOND SIGNALS AND ESTABLISH AN OUTPUT SIGNAL REPRESENTATIVE OF THE DIFFERENCE THEREBETWEEN; APPARATUS FOR INDICATING DEVIATIONS OF SAID FIRST SIGNAL FROM SAID SECOND SIGNAL WHICH ARE GREATER THAN A PRESELECTED MOUNTED COMPRISING SECOND MEANS TO COMPARE TWO INPUT SIGNALS AND ESTABLISH A WARNING SIGNAL WHEN THE DIFFERENCE BETWEEN
Claim 2
Dependent Claim
86 words
IN A PROCESS CONTROL SYSTEM HAVING INPUT MEANS ADAPTED TO RECEIVE A FIRST SIGNAL REPRESENTATIVE OF A MEASURED QUANTITY, SET POINT MEANS TO ESTABLISH A SECOND SIGNAL OF PRESELECTED MAGNITUDE, AND FIRST MEANS TO COMPARE SAID FIRST AND SECOND SIGNALS AND ESTABLISH AN OUTPUT SIGNAL REPRESENTATIVE OF THE DIFFERENCE THEREBETWEEN; APPARATUS FOR INDICATING DEVIATIONS OF SAID FIRST SIGNAL FROM SAID SECOND SIGNAL WHICH ARE GREATER THAN A PRESELECTED MOUNTED COMPRISING SECOND MEANS TO COMPARE TWO INPUT SIGNALS AND ESTABLISH A WARNING SIGNAL WHEN THE DIFFERENCE BETWEEN
References Cited (Backward Citations)
US2939472A
Cited
US2973772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |