US3289393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter plant
Assignee: Voestalpine AG
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Filing: 1965-02-11
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Granted: 1966-12-06
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Expires: 1985-02-11
Abstract
No abstract record available.
Inventors
- 👤 Spotta Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:55
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/4272; B01D46/66; B01D46/70; B01D46/71; B01D46/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A FILTER PLANT COMPRISING A HOUSING HAVING WALLS, AN INLET CONNECTION IN ONE OF SAID WALLS FOR ENTRY OF DUSTLADEN AIR, A PLURALITY OF SUBSTANTIALLY PARALLEL SLOTS IN ANOTHER WALL OF SAID HOUSING, A PURE AIR OUTLET COMMUNICATING WITH A FIRST PORTION, ONLY THE LENGTH OF EACH OF SAID SLOTS, A SCAVENGING AIR INLET COMMUNICATING WITH A SECOND PORTION ONLY, OF EACH SLOT, ALONG ITS LENGTH FOR INTRODUCING AIR THROUGH SAID SLOTS INTO SAID HOUSING, A SLIDE VALVE CORRESPONDING TO EACH SLOT MOUNTED ON SAID ANOTHER WALL AND INCLUDING A SLIDE MEMBER HAVING APERTURES THEREIN MOVABLE TO A FIRST POSITION TO CONNECT SAID FIRST PORTIONS OF SAID SLOTS TO SAID OUTLET AND DISCONNECT SAID SECOND PORTIONS OF SAID SLOTS FROM SAID SCAVENGING AIR INLET AND TO A SECOND POSITION TO CONNECT SAID SECOND PORTIONS OF SAID SLOTS TO SAID SCAVENGING AIR INLET AND DISCONNECT SAID FIRST PORTIONS OF SAID SLOTS FROM SAID AIR OUTLET, MEANS FOR MOVING SAID SLIDE MEMBERS INTERMITTENTLY BETWEEN SAID FIRST AND SECOND POSITIONS, AND A FILTER POCKET CORRESPONDING TO EACH SLOT MOUNTED IN SAID HOUSING AND HAVING AN OPEN SIDE COMMUNICATING WITH A CORRESPONDING SLOT; SAID FILTER POCKETS BEING DISPOSED IN SIDEBY-SIDE, SPACED, SUBSTANTIALLY PARALLEL RELATION.
Claim 2
Dependent Claim
200 words
A FILTER PLANT COMPRISING A HOUSING HAVING WALLS, AN INLET CONNECTION IN ONE OF SAID WALLS FOR ENTRY OF DUSTLADEN AIR, A PLURALITY OF SUBSTANTIALLY PARALLEL SLOTS IN ANOTHER WALL OF SAID HOUSING, A PURE AIR OUTLET COMMUNICATING WITH A FIRST PORTION, ONLY THE LENGTH OF EACH OF SAID SLOTS, A SCAVENGING AIR INLET COMMUNICATING WITH A SECOND PORTION ONLY, OF EACH SLOT, ALONG ITS LENGTH FOR INTRODUCING AIR THROUGH SAID SLOTS INTO SAID HOUSING, A SLIDE VALVE CORRESPONDING TO EACH SLOT MOUNTED ON SAID ANOTHER WALL AND INCLUDING A SLIDE MEMBER HAVING APERTURES THEREIN MOVABLE TO A FIRST POSITION TO CONNECT SAID FIRST PORTIONS OF SAID SLOTS TO SAID OUTLET AND DISCONNECT SAID SECOND PORTIONS OF SAID SLOTS FROM SAID SCAVENGING AIR INLET AND TO A SECOND POSITION TO CONNECT SAID SECOND PORTIONS OF SAID SLOTS TO SAID SCAVENGING AIR INLET AND DISCONNECT SAID FIRST PORTIONS OF SAID SLOTS FROM SAID AIR OUTLET, MEANS FOR MOVING SAID SLIDE MEMBERS INTERMITTENTLY BETWEEN SAID FIRST AND SECOND POSITIONS, AND A FILTER POCKET CORRESPONDING TO EACH SLOT MOUNTED IN SAID HOUSING AND HAVING AN OPEN SIDE COMMUNICATING WITH A CORRESPONDING SLOT; SAID FILTER POCKETS BEING DISPOSED IN SIDEBY-SIDE, SPACED, SUBSTANTIALLY PARALLEL RELATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |