Patent US2801168A successfully refreshed from Google Patents.
US2801168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste sulphite liquor recovery
Assignee: Individual
•
Filing: 1954-03-25
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Granted: 1957-07-30
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Expires: 1974-03-25
Abstract
No abstract record available.
Inventors
- 👤 Goddard Harold Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:17
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0007; Y; Y10; Y10S; Y10S159/00; Y10S159/25; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS OF CONCENTRATING AND DRYING WASTED SULPHITE LIQUOR OBTAINED FROM A MIXTURE OF FIBROUS MATERIAL AND SULPHITE COOKING LIQUOR WHICH COMPRISES FLASH EVAPORATING THE WASTE SULPHITE LIQUOR TO CONCENTRATE SAID LIQUOR AND LIBERATE SO2 THEREFROM, FEEDING CONCENTRATED WASTE SULPHITE LIQUOR INTO A HEATING ZONE, HEATING SAID LIQUOR UNDER A PREDETERMINED PRESSURE THAN SAID HEATING ZONE TO PREVENT STEAMING THEREOF FURTHER CONCENTRATING SAID HEATED LIQUOR BY FLASHING VAPOR THEREFROM IN A ZONE OF LOWER PRESSURE THAN SAID HEATED LIQUOR, FLOWING FURTHERR CONCENTRATED WASTE SULPHITE LIQUOR FROM THE ZONE OF LOWER PRESSURE TO A DRYING ZONE, AND DRYING FURTHER CONCENTRATED LIQUOR IN THE DRYING ZONE INTO SOLID FORM
Claim 2
Dependent Claim
107 words
A PROCESS OF CONCENTRATING AND DRYING WASTED SULPHITE LIQUOR OBTAINED FROM A MIXTURE OF FIBROUS MATERIAL AND SULPHITE COOKING LIQUOR WHICH COMPRISES FLASH EVAPORATING THE WASTE SULPHITE LIQUOR TO CONCENTRATE SAID LIQUOR AND LIBERATE SO2 THEREFROM, FEEDING CONCENTRATED WASTE SULPHITE LIQUOR INTO A HEATING ZONE, HEATING SAID LIQUOR UNDER A PREDETERMINED PRESSURE THAN SAID HEATING ZONE TO PREVENT STEAMING THEREOF FURTHER CONCENTRATING SAID HEATED LIQUOR BY FLASHING VAPOR THEREFROM IN A ZONE OF LOWER PRESSURE THAN SAID HEATED LIQUOR, FLOWING FURTHERR CONCENTRATED WASTE SULPHITE LIQUOR FROM THE ZONE OF LOWER PRESSURE TO A DRYING ZONE, AND DRYING FURTHER CONCENTRATED LIQUOR IN THE DRYING ZONE INTO SOLID FORM
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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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |