Patent US3248890A successfully refreshed from Google Patents.
US3248890A
Expired / Lapsed
US
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Process to concentrate sulphite-lye or other liquors by freezing
Assignee: Individual
•
Filing: 1963-03-06
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Granted: 1966-05-03
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Expires: 1983-03-06
Abstract
No abstract record available.
Inventors
- 👤 Oman Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:44
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0042; Y; Y10; Y10S; Y10S159/00; Y10S159/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS TO CONCENTRATE SULPHITE LYE AND SIMILAR COMPOSITE AQUEOUS LIQUORS BY FREEZING, COMPRISING STEPS OF FIRST COOLING THE LIQUOR TO APPROXIMATELY 0*C., AND THEN FREEZING IT IN AT LEAST TWO SUCCESSIVE STAGES, THE FIRST STAGE COMPRISING PARTIAL EVAPORATION OF THE WATER-CONTENTS OF THE LIQUOR AND FREEZING OF ICE UNDER INFLUENCE OF VACUUM APPROXIMATELY AT THE FREEZING-POINT OF THE LIQUOR, THE LIQUOR THUS CONCENTRATED BEING COOLED IN THE SECOND
Claim 2
Dependent Claim
69 words
A PROCESS TO CONCENTRATE SULPHITE LYE AND SIMILAR COMPOSITE AQUEOUS LIQUORS BY FREEZING, COMPRISING STEPS OF FIRST COOLING THE LIQUOR TO APPROXIMATELY 0*C., AND THEN FREEZING IT IN AT LEAST TWO SUCCESSIVE STAGES, THE FIRST STAGE COMPRISING PARTIAL EVAPORATION OF THE WATER-CONTENTS OF THE LIQUOR AND FREEZING OF ICE UNDER INFLUENCE OF VACUUM APPROXIMATELY AT THE FREEZING-POINT OF THE LIQUOR, THE LIQUOR THUS CONCENTRATED BEING COOLED IN THE SECOND
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |