USRE27118E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Is mechanized heavy duty filter presses
Assignee: —
•
Filing: 1969-08-28
•
Granted: 1971-04-27
•
Expires: 1989-08-28
Abstract
Abstract D R A W I N G A MECHANIZED HEAVY-DUTY FILTER PRESS HAS A PLURALITY OF MOVABLE FILTER MEMBERS. AT LEAST SOME OF THE FILTER MEMBERS HAVE INFLATABLE BLADDERS THEREON, WITH FILTER MEANS SECURED ON OPPOSITE SIDES OF THE BLADDERS AND MEANS FOR WITHDRAWING A LIQUID FROM BETWEEN THE FILTER MEANS AND THE BLADDER. THE FILTERING AREA CAN THUS BE DOUBLED, AS COMPARED TO PRIOR CONSTRUCTIONS IN WHICH THE BLADDER ITSELF FORMED ONE SIDE OF THE FILTER CHAMBER.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:37
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D25/00; B01D25/12; B01D25/127; B01D25/172; B01D25/176; B01D25/21; B01D25/215; B01D25/28; B01D25/282; B01D25/285; B01D25/32; B01D25/322
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |