Patent US2772779A successfully refreshed from Google Patents.
US2772779A
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Method for ph control in circulating water
Assignee: Sinclair Refining Co
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Filing: 1952-01-29
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Granted: 1956-12-04
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Expires: 1972-01-29
Abstract
No abstract record available.
Inventors
- 👤 Donald E Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:09
CPC Classifications
G; G05; G05D; G05D21/00; G05D21/02; Y; Y10; Y10S; Y10S261/00; Y10S261/46; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/2496; Y10T137/2499; Y10T137/2509
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD FOR CONTROL OF PH IN A CONTINUOUSLY CIRCULATING STREAM OF WATER CONTAINING POLYPHOSPATE CORROSION INHIBITORS BY THE ADDITION OF AQUEOUS ACID SOLUTION THERETO, WHICH COMPRISES CONTINUOUSLY MEASURING THE PH VALUE OF THE CIRCULATING WATER, INTRODUCING AQUEOUS ACID SOLUTION AT A REGULATED RATE TO THE STREAM OF WATER AT A POINT UPSTREAM FROM THE POINT AT WHICH THE PH MEASUREMENT IS TAKEN IN A REPEATED CYCLE COMMENCING WHEN THE PH ATTAINS A PREDETERMINED MAXIMUM VALUE ON THE ACID SIDE AND TERMINATING WHEN THE MEASURED PH IS REDUCED TO A PREDETERMINED INTERMEDIATE VALUE, INTRODUCING
Claim 2
Independent Claim
94 words
A METHOD FOR CONTROL OF PH IN A CONTINUOUSLY CIRCULATING STREAM OF WATER CONTAINING POLYPHOSPATE CORROSION INHIBITORS BY THE ADDITION OF AQUEOUS ACID SOLUTION THERETO, WHICH COMPRISES CONTINUOUSLY MEASURING THE PH VALUE OF THE CIRCULATING WATER, INTRODUCING AQUEOUS ACID SOLUTION AT A REGULATED RATE TO THE STREAM OF WATER AT A POINT UPSTREAM FROM THE POINT AT WHICH THE PH MEASUREMENT IS TAKEN IN A REPEATED CYCLE COMMENCING WHEN THE PH ATTAINS A PREDETERMINED MAXIMUM VALUE ON THE ACID SIDE AND TERMINATING WHEN THE MEASURED PH IS REDUCED TO A PREDETERMINED INTERMEDIATE VALUE, INTRODUCING
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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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |