Patent US3711367A successfully refreshed from Google Patents.
US3711367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening device in cellulose digesters
Assignee: Metso Fiber Karlstad AB
•
Filing: 1971-02-09
•
Granted: 1973-01-16
•
Expires: 1991-02-09
Abstract
Abstract A FILTRATE CHAMBER BACK OF A CYLINDRICAL SCREEN GIRDLE INSERTED IN A CELLULOSIC DIGESTER IS DIVIDED BY VERTICAL PARTITIONS INTO COMPARTMENTS AN INTERNAL MANIFOLD OR HEADER LOCATED AXIALLY ADJACENT AND COAXIAL TO SAID FILTRATE CHAMBER COMMUNICATES WITH SAID COMPARTMENT THROUGH NARROW APERTURES A SECOND SIMILAR MANIFOLD MAY BE PROVIDED ON THE OTHER SIDE OF THE SCREEN GIRDLE, THE FILTRATE CHAMBER COMPARTMENTS BEING ALTERNATELY CONNECTED TO THE LOWER AND UPPER MANIFOLD.
Inventors
- 👤 P Christenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:43
CPC Classifications
D; D21; D21C; D21C7/00; B; B01; B01D; B01D29/00; B01D29/11; B01D29/31; B01D29/35; B01D2201/00; B01D2201/46
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |