US3586600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous digesting apparatus
Assignee: Improved Machinery Inc
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Filing: 1967-07-27
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Granted: 1971-06-22
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Expires: 1987-07-27
Abstract
Abstract A CONTINUOUS DIGESTING APPARATUS PARTICULARLY ADAPTED FOR SMALL PARTICLE SIZE CELLULOSIC MATERIAL SUCH AS SAWDUST, COMPRISING AN IMPREGNATION VESSEL WHEREIN THE CELLULOSIC MATERIAL IS FIRST INTERMIXED AND IMPREGNATED WITH HEATED COOKING LIQUOR AND THEREAFTER HEATED BY STEAM TO A TEMPERATURE BELOW COOKING TEMPERATURE, A MIXING VESSEL WHEREIN THE IMPREGNATED CELLULOSIC MATERIAL IS AGITATED AND THENCE HEATED BY STEAM TO COOKING TEMPERATURE, AND A COOKING VESSEL WHEREIN THE COOK IS PERFORMED. ALSO, A METHOD FOR DIGESTING SMALL PARTICLE SIZE CELLULOSIC MATERIAL THROUGH THE EMPLOYMENT OF THIS APPARATUS.
Inventors
- 👤 John P Rich
- 👤 Rohe V Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:07
CPC Classifications
D; D21; D21C; D21C7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |