US4345986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode element for solid polymer electrolyte
Assignee: PPG Industries Ohio Inc
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Filing: 1980-06-02
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Granted: 1982-08-24
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Expires: 2000-06-02
Abstract
Abstract Disclosed is a solid polymer electrolyte unit, an electrolytic cell containing the unit, and an electrolytic process utilizing the unit. The solid polymer electrolyte unit has anodic and cathodic means contacting opposite surfaces thereof, and is characterized by the structure of the cathode. The cathode removably and compressively bears upon the permionic membrane, and is a microporous, metallic cathode.
Inventors
- 👤 Malcolm Korach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:38
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/17; C25B9/19
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
In an electrolytic cell having an electrolyte impermeable permionic membrane with an anodic portion and a cathodic portion, anodic means removably in contact with the anodic portion, and cathodic means removably in contact with and compressively bearing upon the cathodic portion, the improvement wherein the cathodic means removably bearing upon the permionic membrane comprises a microporous, ductile member, consisting essentially of metallic materials, having a thickness of from about 0.01 millimeter to 1.0 millimeter, chosen from the group consisting of perforated foils and perforated sheets, and conforming to the permionic membrane.
Claim 2
Dependent Claim
91 words
In an electrolytic cell having an electrolyte impermeable permionic membrane with an anodic portion and a cathodic portion, anodic means removably in contact with the anodic portion, and cathodic means removably in contact with and compressively bearing upon the cathodic portion, the improvement wherein the cathodic means removably bearing upon the permionic membrane comprises a microporous, ductile member, consisting essentially of metallic materials, having a thickness of from about 0.01 millimeter to 1.0 millimeter, chosen from the group consisting of perforated foils and perforated sheets, and conforming to the permionic membrane.
Claim 3
Dependent Claim
38 words
The electrolytic cell of claim 1 wherein the cathode means bearing upon the permionic membrane comprises a metal sheet having pores less than 0.25 millimeters in diameter, and a porosity of from about 20 to about 80 percent.
Claim 4
Dependent Claim
32 words
The electrolytic cell of claim 1 wherein the cation selectivity of the anodic portion of the permionic membrane is higher than the cation selectivity of the cathodic portion of the permionic membrane.
Claim 5
Dependent Claim
81 words
In an electrolytic cell having an electrolyte impermeable permionic membrane with an anodic portion and a cathodic portion, anodic means removably in contact with the anodic portion, and cathodic means removably in contact with and compressively bearing upon the cathodic portion, the improvement wherein the cathodic means removably bearing upon the permionic membrane comprises a microporous, ductile member, consisting essentially of sintered metallic materials, having a thickness of from about 0.01 millimeter to 1.0 millimeter, and conforming to the permionic membrane.
Claim 6
Dependent Claim
81 words
In an electrolytic cell having an electrolyte impermeable permionic membrane with an anodic portion and a cathodic portion, anodic means removably in contact with the anodic portion, and cathodic means removably in contact with and compressively bearing upon the cathodic portion, the improvement wherein the cathodic means removably bearing upon the permionic membrane comprises a microporous, ductile member, consisting essentially of sintered metallic materials, having a thickness of from about 0.01 millimeter to 1.0 millimeter, and conforming to the permionic membrane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |