US3402117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodes and electrode stacks for electrolytic cells
Assignee: Individual
•
Filing: 1965-10-25
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Granted: 1968-09-17
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Expires: 1985-10-25
Abstract
No abstract record available.
Inventors
- 👤 Evans David Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:13
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02; C25B11/036; C25B9/00; C25B9/70; C25B9/73; C25B9/75
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) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |