US2957773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for crystal production
Assignee: Union Carbide Corp
•
Filing: 1955-07-25
•
Granted: 1960-10-25
•
Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:25
CPC Classifications
A; A23; A23L; A23L2/00; A23L2/02; A23L2/08; A23L2/12; Y; Y10; Y10S; Y10S159/00; Y10S159/05; Y10S159/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF CONCENTRATING AN AQUEOUS HEAT-SENSITIVE LIQUID CONTAINING SOLIDS INTO SOLID PARTICLES COMPRISING THE STEPS OF SUBJECTING THE LIQUID TO A LOW TEMPERATURE BELOW THE FREEZING POINT OF THE LIQUID TO FORM ICE CRYSTALS THEREIN, PASSING THE LIQUID THROUGH A PLURALITY OF STAGES OF PROGRESSIVELY INCREASING TEMPERATURE BUT BELOW THE FREEZING POINT OF THE LIQUID TO FORM ADDITIONAL ICE CRYSTALS TO PROGRESSIVELY DEHYDRATE THE LIQUID, SEPARATING THE ICE CRYSTALS FROM THE LIQUID AFTER EACH STAGE, HEATING THE DEHYDRATED LIQUID TO ROOM TEMPERATURE AS IT EMERGES FROM THE LAST STAGE, DIFFUSING THE HEATED LIQUID INTO A SPRAY, AND SUBJECTING THE SPRAY TO A VACUUM TO EVAPORATE THE WATER THEREFROM AND TO OBTAIN A RESIDUE OF SOLIDS.
Claim 2
Independent Claim
116 words
A METHOD OF CONCENTRATING AN AQUEOUS HEAT-SENSITIVE LIQUID CONTAINING SOLIDS INTO SOLID PARTICLES COMPRISING THE STEPS OF SUBJECTING THE LIQUID TO A LOW TEMPERATURE BELOW THE FREEZING POINT OF THE LIQUID TO FORM ICE CRYSTALS THEREIN, PASSING THE LIQUID THROUGH A PLURALITY OF STAGES OF PROGRESSIVELY INCREASING TEMPERATURE BUT BELOW THE FREEZING POINT OF THE LIQUID TO FORM ADDITIONAL ICE CRYSTALS TO PROGRESSIVELY DEHYDRATE THE LIQUID, SEPARATING THE ICE CRYSTALS FROM THE LIQUID AFTER EACH STAGE, HEATING THE DEHYDRATED LIQUID TO ROOM TEMPERATURE AS IT EMERGES FROM THE LAST STAGE, DIFFUSING THE HEATED LIQUID INTO A SPRAY, AND SUBJECTING THE SPRAY TO A VACUUM TO EVAPORATE THE WATER THEREFROM AND TO OBTAIN A RESIDUE OF SOLIDS.
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |