US3035962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digesting apparatus
Assignee: Sulzer Escher Wyss GmbH
•
Filing: 1959-01-28
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Granted: 1962-05-22
•
Expires: 1979-01-28
Abstract
No abstract record available.
Inventors
- 👤 Schinn Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:49
CPC Classifications
D; D21; D21C; D21C7/00; D21C7/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
THE METHOD OF DIGESTING FIBROUS VEGETABLE MATERIALS IN A VERTICALLY MOUNTED PRESSURE VESSEL, WHICH METHOD CONSISTS IN CONTINUOUSLY FEEDING SAID MATERIALS, IMPREGNATED WITH DIGESTING LIQUOR, INTO THE UPPER END OF SAID VESSEL; REMOVING THE DIGESTED MATERIAL FROM THE LOWER END OF SAID VESSEL; AUTOMATICALLY CONTROLLING THE RATE OF REMOVAL IN RESPONSE TO THE LEVEL OF THE COLUMN OF THE FIBROUS MATERIAL IN SAID VESSEL SO AS TO MAINTAIN A CONSTANT LEVE OF MATERIAL THEREIN INTERMEDIATE ITS UPPER AND LOWER ENDS, THEREBY FORMING A SPACE IN SAID VESSEL ABOVE THE LEVEL OF SAID COLUMN OF MATERIAL AND THROUGH WHICH SAID MATERIALS FED TO THE VESSEL FALL; AND INTRODUCING STEAM INTO
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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) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |