US2706390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bleaching plant
Assignee: Metso Fiber Karlstad AB
•
Filing: 1953-10-19
•
Granted: 1955-04-19
•
Expires: 1973-10-19
Abstract
No abstract record available.
Inventors
- 👤 Johansen Rolf Jomar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:56
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A BLEACH PLANT FOR CELLOSIC PULP, A WASH FILTER, A REACTION TOWER, THE TOP OF SID REACTOR TOWER BEING CONSIDERABLY ABOVE THE TOP OF SAID WASH FILTER, A DEVICE FOR FEEDING PULP OF HIGH DENSITY FROM THE WASH FILTER TO THE BOTTOM OF THE REACTION TOWER, SAID DEVICE COMPRISING A CONDUIT HAVING A VERTICAL TUBULAR PART, A LOWER END OF SAID PART BEING CONNECTED TO THE BOTTOM OF THE TOWER, A VALVE CONNECTED TO THE UPPER END OF SAID VERTICAL PART, SAID VALVE HAVING A POCKETED PLUG ROTARY ABOUT A HORIZONTAL AXIS, MEANS FOR SUPPLYING PULP FROM THE FILTER TO THE UPPER SIDE OF SAID PLUG, AND MEANS FOR THE SUPPLY OF A GASEOUS FLUID TO THE LOWER SIDE OF SAID PLUG.
Claim 2
Dependent Claim
123 words
IN A BLEACH PLANT FOR CELLOSIC PULP, A WASH FILTER, A REACTION TOWER, THE TOP OF SID REACTOR TOWER BEING CONSIDERABLY ABOVE THE TOP OF SAID WASH FILTER, A DEVICE FOR FEEDING PULP OF HIGH DENSITY FROM THE WASH FILTER TO THE BOTTOM OF THE REACTION TOWER, SAID DEVICE COMPRISING A CONDUIT HAVING A VERTICAL TUBULAR PART, A LOWER END OF SAID PART BEING CONNECTED TO THE BOTTOM OF THE TOWER, A VALVE CONNECTED TO THE UPPER END OF SAID VERTICAL PART, SAID VALVE HAVING A POCKETED PLUG ROTARY ABOUT A HORIZONTAL AXIS, MEANS FOR SUPPLYING PULP FROM THE FILTER TO THE UPPER SIDE OF SAID PLUG, AND MEANS FOR THE SUPPLY OF A GASEOUS FLUID TO THE LOWER SIDE OF SAID PLUG.
References Cited (Backward Citations)
US2383684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |