Patent US4350581A successfully refreshed from Google Patents.
US4350581A
Expired / Lapsed
US
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Electrodialysis-cell assembly
Assignee: PROMACO PROJECT MANAGING Co Inc
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Filing: 1980-10-20
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Granted: 1982-09-21
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Expires: 2000-10-20
Abstract
Abstract Novel electrodialysis apparatus in which the frames form fluid directing paths, thereby assuring a strictly parallel flow path of both diluted and concentrated process solutions.
Inventors
- 👤 Harm Schmoldt
- 👤 Klaus Kock
- 👤 Heinrich Strathmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:59
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
63 words
In an electrodialysis apparatus of the type comprising a series of cells formed of membranes and frame members which are bonded together to form a consolidated apparatus, the improvement wherein said frame members form chambers of substantially identical dimensions and wherein said adjacent frame members comprise flow-distribution conduit formed along substantially the entire perimeter of at least one side of said frame member.
Claim 2
Dependent Claim
63 words
In an electrodialysis apparatus of the type comprising a series of cells formed of membranes and frame members which are bonded together to form a consolidated apparatus, the improvement wherein said frame members form chambers of substantially identical dimensions and wherein said adjacent frame members comprise flow-distribution conduit formed along substantially the entire perimeter of at least one side of said frame member.
Claim 3
Dependent Claim
25 words
In apparatus as defined in claim 1 wherein said flow-distribution conduit means is a plurality of fan-shaped conduits arranged side by side across said perimeter.
Claim 4
Dependent Claim
39 words
Apparatus as defined in claims 1 or 2 wherein frame member of a non-terminal cell in said apparatus comprises said flow-distribution conduit means at the top and bottom perimeter of each frame on a cell-side of each said frame.
Claim 5
Dependent Claim
107 words
An electrodialysis apparatus as defined in claim 1 of the type comprising a series of cells formed by frame members which contain apertures for process fluids, and which are only bonded together and to membranes to form a consolidated dialysis apparatus, the improvement wherein said bonded frame members are of substantially identical dimensions, wherein each of said frame members bonds an ion membrane on one side thereof and to another said frame member on the other side thereof, and wherein any spacer is placed only between the adjacent membranes and within area framed by said frame members but not between the bonded faces of said frame members.
Claim 6
Dependent Claim
49 words
Apparatus as defined in claim 4 wherein each frame member is of identical dimensions with an adjacent frame member and, when turned 180 angular degrees, forms with said adjacent frame member flow distribution conduits along substantially the entire length of each of at least one side of a membrane.
Claim 7
Dependent Claim
19 words
Apparatus as defined in claims 4 or 5 wherein said flow distribution conduits comprise a plurality of fan-shaped conduits.
Claim 8
Dependent Claim
24 words
Apparatus as defined in claim 4 wherein said flow conduits are along substantially the entire length of the top and bottom of a membrane.
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) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |