Exploding of ammonia impregnated wood chips
Abstract
Abstract A PROCESS OF MANUFACTURING PULP INCLUDING THE STEPS OF IMPREGNATING A MASS OF LIGNOCELLULOSIC CHIPS WITH ANHYDROUS AMMONIA, HEATING, WITHOUT ADDED STEAM, THE IMPREGNATED CHIPS WITHIN A CLOSED SPACE UNDER PRESSURE AND SUDDENLY RELEASING THE PRESSURE TO CAUSE EJECTION OF THE IMPREGNATED CHIPS FROM THE SPACE AND EXPLOSIVE REMOVAL OF AMMONIA WITH ACCOMPANYING DEFORMATION AND DISINTEGRATION OF THE CHIPS TO A FIBROUS CONDITION IN WHICH THE FIBERS ARE FLEXIBLE, KINKED, TWISTED AND CURLED. THE FIBERS ARE OF A RELATIVELY LIGHT COLOR, UNFIBRILLATED, CONTAIN SUBSTANTIALLY ALL OF THE CELLULOSE, HEMICELLULOSE AND LIGNIN OF THE ORGINAL MATERIAL, ARE READILY DELIGNIFIED AND ARE BLEACHABLE TO A HIGH BRIGHTNESS.
Inventors
- 👤 James J O'connor
Bibliographic Details
Claims Analysis
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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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |