US2944967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for treating liquid circulating systems and compositions therefor
Assignee: UNITED STATES MOVIDYN Corp
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Filing: 1958-05-12
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Granted: 1960-07-12
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Expires: 1978-05-12
Abstract
No abstract record available.
Inventors
- 👤 Edward W Dunklin
- 👤 Marie K Moudry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:51
CPC Classifications
D; D21; D21C; D21C3/00; D21C3/22; D21C3/28; Y; Y10; Y10S; Y10S210/00; Y10S210/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD FOR CONTROLLING SLIMES IN A CIRCULATING LIQUID SYSTEM WHEREIN THE LIQUID CONTAINS POLYVALENT METAL IONS AND IS SUCCESSIVELY AT A LOWER PH AND THEN A HIGHER PH DURING CIRCULATION, COMPRISING INTRODUCING INTO THE CIRCULATION LIQUID AT LEAST ONE SEQUESTERING AGENT SELECTED FROM THE GROUP CONSISTING OF THE SUGAR ACIDS, THE ALKALI METAL, ALKALINE EARTH METAL AND AMMONIUM SALTS OF THE SUGAR ACIDS, AND SORBITOL, AND CIRCULATING THE LIQUID THROUGH THE SYSTEM, SAID ADDITION BEING MADE AT A RATE TO PROVIDE A CONCENTRATION OF THE SEQUESTERING AGENT, AT THE POINT OR POINTS OF THE SYSTEM SUBJECT TO SLIME FORMATION, EQUAL TO 0.1-100 PARTS PER MILLION, SAID SEQUESTERING AGENTS BEING EFFECTIVE TO SEQUESTER SUCH POLYVALENT METAL IONS AND THEREBY PREVENT PRECIPITATION OF SLIMEFORMING CHEMICAL COMPOUNDS WHEN THE CIRCULATING LIQUID IS AT THE HIGHER PH.
Claim 2
Independent Claim
134 words
THE METHOD FOR CONTROLLING SLIMES IN A CIRCULATING LIQUID SYSTEM WHEREIN THE LIQUID CONTAINS POLYVALENT METAL IONS AND IS SUCCESSIVELY AT A LOWER PH AND THEN A HIGHER PH DURING CIRCULATION, COMPRISING INTRODUCING INTO THE CIRCULATION LIQUID AT LEAST ONE SEQUESTERING AGENT SELECTED FROM THE GROUP CONSISTING OF THE SUGAR ACIDS, THE ALKALI METAL, ALKALINE EARTH METAL AND AMMONIUM SALTS OF THE SUGAR ACIDS, AND SORBITOL, AND CIRCULATING THE LIQUID THROUGH THE SYSTEM, SAID ADDITION BEING MADE AT A RATE TO PROVIDE A CONCENTRATION OF THE SEQUESTERING AGENT, AT THE POINT OR POINTS OF THE SYSTEM SUBJECT TO SLIME FORMATION, EQUAL TO 0.1-100 PARTS PER MILLION, SAID SEQUESTERING AGENTS BEING EFFECTIVE TO SEQUESTER SUCH POLYVALENT METAL IONS AND THEREBY PREVENT PRECIPITATION OF SLIMEFORMING CHEMICAL COMPOUNDS WHEN THE CIRCULATING LIQUID IS AT THE HIGHER PH.
References Cited (Backward Citations)
US2221339A
Cited
US2692231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |