US3580824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated graphite
Assignee: Hooker Chemical Corp
•
Filing: 1968-12-31
•
Granted: 1971-05-25
•
Expires: 1988-12-31
Abstract
Abstract GRAPHITE IMPREGNATED WITH IRON IN AN AMOUNT BETWEEN ABOUT 0.05 TO ABOUT 3 PERCENT BY WEIGHT AFFORDS AN EXCEL LENT ELECTRODE MATERIAL FOR THE ELECTROLYSIS OF ALKALI METAL HALIDES. ELECTRODE OVER VOLTAGE IS DECREASED AND ELECTRODE LIFE IS PROLONGED BY IRON DEPOSITION IN COMPARISON TO CONVENTIONAL GRAPHITE ELECTRODES.
Inventors
- 👤 John E Currey
- 👤 Morris P Grotheer
- 👤 Edward H Cook Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:59
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/044
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |