US3838384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protected electrode lead for use in a corrosive environment
Assignee: Alcoa Corp
•
Filing: 1972-12-26
•
Granted: 1974-09-24
•
Expires: 1992-12-26
Abstract
Abstract An electrode assembly for use in an electrolytic cell having a corrosive environment comprising high temperature chlorine gas and a bath of aluminum chloride dissolved in one or more salts. The assembly comprises an electrode disposed within the cell, at least one electrical current conducting lead made of material susceptible to corrosive attack by the environment extending into the electrode, and a fluid impervious, electrically conductive sleeve disposed around the lead along at least the length thereof extending through a wall of the cell, and in contact with the electrode. The fluid impervious sleeve is effective to prevent contact of approaching corrosive constituents with the lead.
Inventors
- 👤 S Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:52
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12; C25C3/125; C25C7/00; C25C7/02; C25C7/025
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
24 words
The structure of claim 1 in which the material of the impervious sleeve is graphite, said material being coated with a pyrolytic graphite material.
Claim 2
Dependent Claim
28 words
The structure of claim 1 including an electrically insulating sleeve disposed around at least the portion of the impervious sleeve that traverses the defining wall of the chamber.
Claim 3
Dependent Claim
26 words
The structure of claim 1 including means for cooling the conductive lead member along at least the portion thereof traversing the defining wall of the chamber.
References Cited (Backward Citations)
US3046213A
Cited
DE1103304B
Cited
US3320456A
Cited
US3489668A
Cited
US3471395A
Cited
US3497444A
Cited
US3630880A
Cited
US3607708A
Cited
US3612751A
Cited
US3645878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |