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US3176755A
Expired / Lapsed
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Control system for multiple-effect evaporators
Assignee: Elsag Bailey Inc
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Filing: 1960-08-17
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Granted: 1965-04-06
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Expires: 1980-08-17
Abstract
No abstract record available.
Inventors
- 👤 George L Harman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:16
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/0082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A CONTROL SYSTEM FOR A MULTIPLE-EFFECT EVAPORATOR SYSTEM FOR THE CONCENTRATION OF THIN BLACK LIQUOR TO THICH BLACK LIQUOR, COMPRISING IN COMBINATION: MEASURING MEANS OF THE RATE OF FLOW OF HEATING MEDIUM FURNISHED THE SYSTEM, REGULATING MEANS OF THE HEATING MEDIUM FURNISHED THE SYSTEM OPERATED BY SAID MEASURING MEANS AND HAVING AN ADJUSTABLE SET POINT, MEANS MEASURING THE RATE OF FLOW OF THIN BLACK LIQUOR TO THE SYSTEM, MEANS OPERATED BY SAID LAST NAMED MEANS ADJUSTING THE SET POINT OF SAID REGULATING MEANS TO MAINTAIN A CONSTANT RATIO BETWEEN THE RATE OF FLOW OF HEATING MEDIUM AND THIN BLACK LIQUOR, MEANS DETERMINING THE CONCENTRATION OF THE THICK BLACK LIQUOR AND MEANS OPERATED BY SAID LAST NAMED MEANS AJUSTING THE RATIO MAINTAINED BETWEEN THE RATES OF FLOW OF HEATING MEDIUM AND THIN BLACK LIQUOR IN A DIRECTION TENDING TO MAINTAIN A CONSTANT CONCENTRATION OF THE THICK BLACK LIQUOR.
Claim 2
Dependent Claim
148 words
IN A CONTROL SYSTEM FOR A MULTIPLE-EFFECT EVAPORATOR SYSTEM FOR THE CONCENTRATION OF THIN BLACK LIQUOR TO THICH BLACK LIQUOR, COMPRISING IN COMBINATION: MEASURING MEANS OF THE RATE OF FLOW OF HEATING MEDIUM FURNISHED THE SYSTEM, REGULATING MEANS OF THE HEATING MEDIUM FURNISHED THE SYSTEM OPERATED BY SAID MEASURING MEANS AND HAVING AN ADJUSTABLE SET POINT, MEANS MEASURING THE RATE OF FLOW OF THIN BLACK LIQUOR TO THE SYSTEM, MEANS OPERATED BY SAID LAST NAMED MEANS ADJUSTING THE SET POINT OF SAID REGULATING MEANS TO MAINTAIN A CONSTANT RATIO BETWEEN THE RATE OF FLOW OF HEATING MEDIUM AND THIN BLACK LIQUOR, MEANS DETERMINING THE CONCENTRATION OF THE THICK BLACK LIQUOR AND MEANS OPERATED BY SAID LAST NAMED MEANS AJUSTING THE RATIO MAINTAINED BETWEEN THE RATES OF FLOW OF HEATING MEDIUM AND THIN BLACK LIQUOR IN A DIRECTION TENDING TO MAINTAIN A CONSTANT CONCENTRATION OF THE THICK BLACK LIQUOR.
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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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |