US4165272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow cathode for an electrolytic cell
Assignee: PPG Industries Inc
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Filing: 1978-07-27
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Granted: 1979-08-21
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Expires: 1998-07-27
Abstract
Abstract Disclosed is an electrolytic cell cathode having a hollow cathode finger with fins extending outwardly therefrom. A synthetic separator surrounds the cathode and rests upon the fin-like extensions.
Inventors
- 👤 Hugh Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:46
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02; C25B11/03; C25B11/036; C25B13/00; C25B13/02; C25B9/00; C25B9/17; C25B9/19
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
58 words
A cathode element comprising: a hollow cathode finger having a pair of electrolyte permeable side walls substantially parallel to and spaced from each other; said side walls having extensions bonded thereto and extending outwardly therefrom; and a synthetic separator surrounding said cathode element, spaced from and substantially parallel to the side walls thereof, and resting upon the extensions.
Claim 2
Dependent Claim
58 words
A cathode element comprising: a hollow cathode finger having a pair of electrolyte permeable side walls substantially parallel to and spaced from each other; said side walls having extensions bonded thereto and extending outwardly therefrom; and a synthetic separator surrounding said cathode element, spaced from and substantially parallel to the side walls thereof, and resting upon the extensions.
Claim 3
Dependent Claim
11 words
The cathode element of claim 1 wherein the extensions are fins.
Claim 4
Dependent Claim
21 words
The cathode element of claim 1 wherein the extensions are rods substantially parallel to each other and to the side walls.
Claim 5
Dependent Claim
23 words
The cathode element of claim 1 wherein the extensions are rods substantially parallel to each other and substantially perpendicular to the side walls.
Claim 6
Dependent Claim
12 words
The cathode element of claim 1 wherein the extensions are substantially nonconductive.
Claim 7
Dependent Claim
12 words
The cathode element of claim 1 wherein the side walls are perforate.
Claim 8
Dependent Claim
12 words
The cathode element of claim 1 wherein the side walls are mesh.
Claim 9
Dependent Claim
131 words
A cathode unit comprising: (a) a cathode element containing: (1) a hollow cathode finger having a pair of electrolyte permeable side walls substantially parallel to and spaced from each other and electrical conduction means at a base thereof; (2) said side walls having extensions bonded thereto and extending outwardly therefrom; (3) a synthetic separator surrounding said cathode element, substantially parallel to and spaced from the side walls thereof, and resting upon the extensions; (b) a backplate in electrical contact with the cathode element through said electrical conduction means; and (c) a back screen spaced from and substantially parallel to said backplate, said cathode finger and said back screen having an electrolyte tight seal therebetween whereby to define a volume within said hollow finger and between said back screen and said backplate.
Claim 10
Dependent Claim
131 words
A cathode unit comprising: (a) a cathode element containing: (1) a hollow cathode finger having a pair of electrolyte permeable side walls substantially parallel to and spaced from each other and electrical conduction means at a base thereof; (2) said side walls having extensions bonded thereto and extending outwardly therefrom; (3) a synthetic separator surrounding said cathode element, substantially parallel to and spaced from the side walls thereof, and resting upon the extensions; (b) a backplate in electrical contact with the cathode element through said electrical conduction means; and (c) a back screen spaced from and substantially parallel to said backplate, said cathode finger and said back screen having an electrolyte tight seal therebetween whereby to define a volume within said hollow finger and between said back screen and said backplate.
Claim 11
Dependent Claim
11 words
The cathode unit of claim 8 wherein the extensions are fins.
Claim 12
Dependent Claim
21 words
The cathode unit of claim 8 wherein the extensions are rods substantially parallel to each other and to the side walls.
Claim 13
Dependent Claim
23 words
The cathode unit of claim 8 wherein the extensions are rods substantially parallel to each other and substantially perpendicular to the side walls.
Claim 14
Dependent Claim
12 words
The cathode unit of claim 8 wherein the extensions are substantially nonconductive.
Claim 15
Dependent Claim
12 words
The cathode unit of claim 8 wherein the side walls are perforate.
Claim 16
Dependent Claim
12 words
The cathode unit of claim 8 wherein the side walls are mesh.
Claim 17
Dependent Claim
118 words
A cathode unit comprising: (a) a cathode element containing: (1) a cathode finger having a cathode conductor with electrical connection means at a base thereof; (2) cathode blades mounted on said cathode conductor and substantially perpendicular to the main axis thereof; (3) a synthetic separator surrounding said cathode element and resting upon the cathode blades; (b) a backplate in electrical contact with the cathode element through electrical conductive means; and (c) a back screen spaced from and substantially parallel to said backplate and substantially perpendicular to said cathode finger, said cathode finger and said back screen having an electrolyte tight seal therebetween whereby to define a volume within said finger and between said back screen and said backplate.
Claim 18
Dependent Claim
118 words
A cathode unit comprising: (a) a cathode element containing: (1) a cathode finger having a cathode conductor with electrical connection means at a base thereof; (2) cathode blades mounted on said cathode conductor and substantially perpendicular to the main axis thereof; (3) a synthetic separator surrounding said cathode element and resting upon the cathode blades; (b) a backplate in electrical contact with the cathode element through electrical conductive means; and (c) a back screen spaced from and substantially parallel to said backplate and substantially perpendicular to said cathode finger, said cathode finger and said back screen having an electrolyte tight seal therebetween whereby to define a volume within said finger and between said back screen and said backplate.
Claim 19
Dependent Claim
16 words
The cathode unit of claim 15 wherein the cathode blades are substantially parallel to each other.
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) | 1982-08-20 | 1983-02-19 | 1983-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-20 | 1987-02-19 | 1987-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-20 | 1991-02-19 | 1991-08-21 | $7700.00 | Window Closed / Lapsed |