Patent US2552523A successfully refreshed from Google Patents.
US2552523A
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Method of extracting liquids from a solution to effect concentration
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1948-06-18
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Granted: 1951-05-15
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Expires: 1968-06-18
Abstract
No abstract record available.
Inventors
- 👤 George L Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
A; A23; A23L; A23L2/00; A23L2/02; A23L2/08; A23L2/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN A PROCESS OF CONCENTRATING SOLUTIONS BY REMOVAL OF CRYSTALLIZABLE SOLVENT THEREFROM, THE STEPS COMPRISING FORMING A SERIES OF SOLUTIONS OF PROGRESSIVELY INCREASED CONCENTRATION, MAINTAINING A PREDETERMINED TEMPERATURE IN EACH OF THE SOLUTIONS PROGRESSIVELY DECREASING IN THE DIRECTION OF INCREASED CONCENTRATION, FORMING SOLVENT CRYSTALS IN EACH SOLUTION SEPARATELY, REMOVING CRYSTALS GREATER THAN A PREDETERMINED SIZE FROM THE SOLUTIONS AND TRANSFERRING THEM TO THE LESS CONCENTRATED PRECEDING SOLUTION OF THE SERIES.
Claim 2
Dependent Claim
70 words
IN A PROCESS OF CONCENTRATING SOLUTIONS BY REMOVAL OF CRYSTALLIZABLE SOLVENT THEREFROM, THE STEPS COMPRISING FORMING A SERIES OF SOLUTIONS OF PROGRESSIVELY INCREASED CONCENTRATION, MAINTAINING A PREDETERMINED TEMPERATURE IN EACH OF THE SOLUTIONS PROGRESSIVELY DECREASING IN THE DIRECTION OF INCREASED CONCENTRATION, FORMING SOLVENT CRYSTALS IN EACH SOLUTION SEPARATELY, REMOVING CRYSTALS GREATER THAN A PREDETERMINED SIZE FROM THE SOLUTIONS AND TRANSFERRING THEM TO THE LESS CONCENTRATED PRECEDING SOLUTION OF THE SERIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |