US3615015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter press
Assignee: Aqseptence Group GmbH
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Filing: 1969-10-23
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Granted: 1971-10-26
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Expires: 1989-10-23
Abstract
Abstract A FILTER PRESS WHEREIN THE EFFECTIVE FILTERING AREA MAY BE ENLARGED BY THE CONSTRUCTION WHEREBY THE SPACE BETWEEN ADJACENT FILTER PLATES IS SUB-DIVIDED INTO CHAMBERS, EACH ISOLATED FROM EACH OTHER BUT IN FLUID COMMUNICATION WITH CORRESPONDING CHAMBERS IN THE SPACES BETWEEN ADJACENT FILTER PLATES. A SEPARATE FLUID CONVEYANCE DEVICE MAY BE PROVIDED FOR EACH GROUP OF CONNECTED CHAMBERS.
Inventors
- 👤 Oswald Busse
- 👤 Hugo Klesper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/21; B01D25/215; B01D25/30; B01D25/302
Claims Analysis
Total Claims: 0
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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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |