US2668099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dewatering lignocellulosic materials in the production of fuel
Assignee: Stora Enso Oyj
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Filing: 1949-04-11
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Granted: 1954-02-02
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Expires: 1969-04-11
Abstract
No abstract record available.
Inventors
- 👤 Cederquist Karl Nicolaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:49
CPC Classifications
C; C10; C10F; C10F5/00; Y; Y10; Y10S; Y10S44/00; Y10S44/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE TREATMENT OF LIGNOCELLULOSIC MATERIALS, INCLUDING PEAT, CONTAINING SUBSTANTIAL AMOUNTS OF WATER TO DEWATER THEM IN THE PRODUCTION OF FUEL THEREFROM INVOLVING HEATING SAID MATERIAL UNDER PRESSURE AT A TEMPERATURE OF AT LEAST ABOUT 150* C. AND THEN MECHANICALLY SEPARATING WATER FROM THE TREATED MATERIAL, THE IMPROVEMENT WHICH COMPRISES SUPPLYING AT LEAST A SUBSTANTIALL PORTION OF THE HEAT BY SUBJECTING SAID MATERIAL, UNDER PRESSURE, TO THE ACTION OF OXYGEN-CONTAINING GAS TO SUBSTANTIALLY COMPLETELY OXIDIZE A SMALL PORTION OF SAID MATERIAL TO CARBON DIOXIDE AND WATER WITH THE LIBERATION OF HEAT, AND THEN MECHANICALLY SEPARATING WATER FROM THE TREATED MATERIAL.
Claim 2
Dependent Claim
100 words
IN THE TREATMENT OF LIGNOCELLULOSIC MATERIALS, INCLUDING PEAT, CONTAINING SUBSTANTIAL AMOUNTS OF WATER TO DEWATER THEM IN THE PRODUCTION OF FUEL THEREFROM INVOLVING HEATING SAID MATERIAL UNDER PRESSURE AT A TEMPERATURE OF AT LEAST ABOUT 150* C. AND THEN MECHANICALLY SEPARATING WATER FROM THE TREATED MATERIAL, THE IMPROVEMENT WHICH COMPRISES SUPPLYING AT LEAST A SUBSTANTIALL PORTION OF THE HEAT BY SUBJECTING SAID MATERIAL, UNDER PRESSURE, TO THE ACTION OF OXYGEN-CONTAINING GAS TO SUBSTANTIALLY COMPLETELY OXIDIZE A SMALL PORTION OF SAID MATERIAL TO CARBON DIOXIDE AND WATER WITH THE LIBERATION OF HEAT, AND THEN MECHANICALLY SEPARATING WATER FROM THE TREATED MATERIAL.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |