US3257307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell for the production of aluminum
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1962-06-11
•
Granted: 1966-06-21
•
Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Jack L Henry
- 👤 Robin D Holliday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:44
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN AN ELECTROLYTIC CELL FOR THE PRODUCTION OF ALUMINUM ADAPTED TO CONTAIN A MOLTEN METAL CATHODE LAYER, AN ELECTROLYTE LAYER ABOVE SAID METAL LAYER, A CRUST LAYER ABOVE SAID ELECTRLYTE LAYER, AND HAVING AN ANODIC SYSTEM COMPRISING AT LEASE ONE ANODE ADAPTED TO EXTEND THROUGH SAID CRUST LAYER INTO SAID ELECTRLYTE LAYER AND A CATHODIC SYSTEM COMPRISING AT LEAST ONE CATHODIC CURRENT CONDUCTING ELEMENT ADAPTED TO EXTEND THROUGH SAID CRUST AND ELECTROLYTE LAYERS INTO SAID METAL LAYER, AND WHEREIN SAID ELEMENT IS COMPRISED OF REFRACTORY HARD METAL; THE IMPROVEMENT COMPRISING SACRIFICIAL CATHODE MEANS COMPRISING ELECTRICALLY CONDUCTIVE MATERIAL INTERPOSED BE-TWEEN SAID ANODE AND REFRACTORY HARD METAL CONDUCTOR ELEMENT, SAID SACRIFICIAL CATHODE MEANS ADAPTED TO EXTEND INTO SAID CRUST LAYER, MEANS TO ELECTRICALLY CONNECT SAID SACRIFICIAL CATHODE MEANS TO A CATHODIC SYSTEM TO ENABLE CURRENT PASSAGE IN THE CRUST LAYER SUBSTANTIALLY BETWEEN SAID ANODE AND SAID SACRIFICIAL CATHODE MEANS.
Claim 2
Dependent Claim
147 words
IN AN ELECTROLYTIC CELL FOR THE PRODUCTION OF ALUMINUM ADAPTED TO CONTAIN A MOLTEN METAL CATHODE LAYER, AN ELECTROLYTE LAYER ABOVE SAID METAL LAYER, A CRUST LAYER ABOVE SAID ELECTRLYTE LAYER, AND HAVING AN ANODIC SYSTEM COMPRISING AT LEASE ONE ANODE ADAPTED TO EXTEND THROUGH SAID CRUST LAYER INTO SAID ELECTRLYTE LAYER AND A CATHODIC SYSTEM COMPRISING AT LEAST ONE CATHODIC CURRENT CONDUCTING ELEMENT ADAPTED TO EXTEND THROUGH SAID CRUST AND ELECTROLYTE LAYERS INTO SAID METAL LAYER, AND WHEREIN SAID ELEMENT IS COMPRISED OF REFRACTORY HARD METAL; THE IMPROVEMENT COMPRISING SACRIFICIAL CATHODE MEANS COMPRISING ELECTRICALLY CONDUCTIVE MATERIAL INTERPOSED BE-TWEEN SAID ANODE AND REFRACTORY HARD METAL CONDUCTOR ELEMENT, SAID SACRIFICIAL CATHODE MEANS ADAPTED TO EXTEND INTO SAID CRUST LAYER, MEANS TO ELECTRICALLY CONNECT SAID SACRIFICIAL CATHODE MEANS TO A CATHODIC SYSTEM TO ENABLE CURRENT PASSAGE IN THE CRUST LAYER SUBSTANTIALLY BETWEEN SAID ANODE AND SAID SACRIFICIAL CATHODE MEANS.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |