US2744864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the electrolysis of aqueous alkali sulphate solutions
Assignee: Merck KGaA
•
Filing: 1951-02-14
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Granted: 1956-05-08
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Expires: 1971-02-14
Abstract
No abstract record available.
Inventors
- 👤 Muller Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:21
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/70; C25B1/00; C25B1/01; C25B1/22; C25B11/00; C25B11/02; C25B11/033; C25B9/005; C25B9/30; C25B9/303
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US738094A
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US742865A
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US803263A
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AT73526B
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US1117879A
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GB471912A
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US2150775A
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DE701771C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |