US3274093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode construction for aluminum production
Assignee: Reynolds Metals Co
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Filing: 1961-08-29
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Granted: 1966-09-20
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Expires: 1981-08-29
Abstract
No abstract record available.
Inventors
- 👤 Curtis J Mcminn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:31
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/16; C25C3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
AN ELECTROLYTIC CELL FOR THE PRODUCTION OF ALUMINUM, INCLUDING A CATHODE CONSTRUCTION COMPRISING A COLLECTOR BAR HAVING A SURFACE ADAPTED FOR CONTACT WITH THE MOLTEN CONTENTS OF THE CELL AND A STEM PORTION ADAPTED FOR CONNECTIN TO A CATHODE VOLTAGE SUPPLYM SAID STEM PORTION OF THE COLLECTOR BAR COMPRISING A SECTION OF CERMET MATERIAL HAVING A METAL COMPONENT AND CONTAINING A REFRACTORY HARD METAL CERAMIC CONSTITUENT, SAID METAL COMPONENT BEING DISTRIBUTED SUBSTANTIALLY THROUGHOUT THE CERMET, THE PROPORTION OF SAID REFRACTORY HARD METAL CONSTITUENT RELATIVE TO THE METAL COMPONENT OF THE CERMET BEING GRADED LENGTHWISE OF THAT SECTION.
Claim 2
Dependent Claim
97 words
AN ELECTROLYTIC CELL FOR THE PRODUCTION OF ALUMINUM, INCLUDING A CATHODE CONSTRUCTION COMPRISING A COLLECTOR BAR HAVING A SURFACE ADAPTED FOR CONTACT WITH THE MOLTEN CONTENTS OF THE CELL AND A STEM PORTION ADAPTED FOR CONNECTIN TO A CATHODE VOLTAGE SUPPLYM SAID STEM PORTION OF THE COLLECTOR BAR COMPRISING A SECTION OF CERMET MATERIAL HAVING A METAL COMPONENT AND CONTAINING A REFRACTORY HARD METAL CERAMIC CONSTITUENT, SAID METAL COMPONENT BEING DISTRIBUTED SUBSTANTIALLY THROUGHOUT THE CERMET, THE PROPORTION OF SAID REFRACTORY HARD METAL CONSTITUENT RELATIVE TO THE METAL COMPONENT OF THE CERMET BEING GRADED LENGTHWISE OF THAT SECTION.
References Cited (Backward Citations)
DE868031C
Cited
US3009870A
Cited
US2904863A
Cited
US3028324A
Cited
US3186044A
Cited
US3161579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |