Patent FI20481A successfully refreshed from Google Patents.
US2673232A
Expired / Lapsed
US
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Feed device for electrolytic cells
Assignee: Diamond Shamrock Corp
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Filing: 1950-01-24
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Granted: 1954-03-23
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Expires: 1970-01-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Christopher C Silsby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:39
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/16; B05B5/1608; B05B5/1616; B05B5/165; H; H01; H01M; H01M50/00; H01M50/70; H01M50/77; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |