US3409533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercury-method cell for alkali chloride electrolysis
Assignee: Asahi Kasei Corp
•
Filing: 1964-03-23
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Granted: 1968-11-05
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Expires: 1984-03-23
Abstract
No abstract record available.
Inventors
- 👤 Murayama Koichi
- 👤 Toshima Shoji
- 👤 Fukushima Toshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:37
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02; C25B11/03; C25B1/00; C25B1/01; C25B1/34; C25B1/36; C25B11/033; C25B9/00; C25B9/30; C25B9/303; C25B9/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US645055A
Cited
US705264A
Cited
GB804921A
Cited
US2916425A
Cited
US3268427A
Cited
US3310482A
Cited
US3308043A
Cited
US3265490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |