US2593751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Igneous electrolysis cell
Assignee: Pechiney SA
•
Filing: 1948-05-17
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Granted: 1952-04-22
•
Expires: 1968-05-17
Abstract
No abstract record available.
Inventors
- 👤 Grolee Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:48
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
AN IGNEOUS ELECTROLYTIC CELL COMPRISING: AN INNER LINING FOR THE BOTTOM PORTION THEREOF FORMED OF BAKED CARBONACEOUS MATERIAL, CURRENT CONDUCTING METAL BARS POSITIONED IN SAID LINING AND A CAST SEAL OF LOW ELECTRICAL RESISTANCE BETWEEN SAID LINING AND SAID BARS CONSISTING OF CAST IRON CONTAINING APPROXIMATELY 3% CARBON, 2.5 TO 3% SILICON, 1 TO 1.5% PHOSPHOROUS, LESS THAN 0.5% MANAGANESE, LESS THAN 0.05% SULFUR, AND THE REMAINDER IRON, THE MATERIAL OF SAID SEAL BEING CHARACTERIZED IN HAVING A MELTING POINT IN EXCESS
Claim 2
Dependent Claim
82 words
AN IGNEOUS ELECTROLYTIC CELL COMPRISING: AN INNER LINING FOR THE BOTTOM PORTION THEREOF FORMED OF BAKED CARBONACEOUS MATERIAL, CURRENT CONDUCTING METAL BARS POSITIONED IN SAID LINING AND A CAST SEAL OF LOW ELECTRICAL RESISTANCE BETWEEN SAID LINING AND SAID BARS CONSISTING OF CAST IRON CONTAINING APPROXIMATELY 3% CARBON, 2.5 TO 3% SILICON, 1 TO 1.5% PHOSPHOROUS, LESS THAN 0.5% MANAGANESE, LESS THAN 0.05% SULFUR, AND THE REMAINDER IRON, THE MATERIAL OF SAID SEAL BEING CHARACTERIZED IN HAVING A MELTING POINT IN EXCESS
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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) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |