US3041233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of introducing high density pulp into a pressure vessel
Assignee: Metso Fiber Karlstad AB
•
Filing: 1957-12-17
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Granted: 1962-06-26
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Expires: 1977-12-17
Abstract
No abstract record available.
Inventors
- 👤 Richter Johan Christoffer Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:45
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD FOR THE CONTINUOUS TREATMENT OF PULP WITH A TREATING LIQUID IN A TREATING VESSEL OPERATED AT SUPERATMOSPHERIC PRESSURE, SAID METHOD COMPRISING MIXING TREATING LIQUID WITH THE PULP AT ATMOSPHERIC PRESSURE TO FORM A LOW DENSITY MIXTURE OF A DENSITY NOT OVER ABOUT 12%, PUMPING THE RESULTING LOW DENSITY MIXTURE INTO AN EXTRACTING ZONE AT A PRESSURE EQUAL TO THE SUPERATMOSPHERIC PRESSURE IN SAID VESSEL, PRESSING SAID MIXTURE IN SAID EXTRACTION ZONE TO EXTRACT LIQUID THEREFROM AND FORM A HIGH DENSITY PULP OF A DENSITY OF ABOUT 25 TO 30% AND THEN DISCHARGING THIS HIGH DENSITY PULP FROM SAID EXTRACTION ZONE INTO THE VESSEL AND TREATING THE PULP THEREIN.
Claim 2
Independent Claim
110 words
A METHOD FOR THE CONTINUOUS TREATMENT OF PULP WITH A TREATING LIQUID IN A TREATING VESSEL OPERATED AT SUPERATMOSPHERIC PRESSURE, SAID METHOD COMPRISING MIXING TREATING LIQUID WITH THE PULP AT ATMOSPHERIC PRESSURE TO FORM A LOW DENSITY MIXTURE OF A DENSITY NOT OVER ABOUT 12%, PUMPING THE RESULTING LOW DENSITY MIXTURE INTO AN EXTRACTING ZONE AT A PRESSURE EQUAL TO THE SUPERATMOSPHERIC PRESSURE IN SAID VESSEL, PRESSING SAID MIXTURE IN SAID EXTRACTION ZONE TO EXTRACT LIQUID THEREFROM AND FORM A HIGH DENSITY PULP OF A DENSITY OF ABOUT 25 TO 30% AND THEN DISCHARGING THIS HIGH DENSITY PULP FROM SAID EXTRACTION ZONE INTO THE VESSEL AND TREATING THE PULP THEREIN.
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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) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |