Patent US3433166A successfully refreshed from Google Patents.
US2920004A
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Method of treating drying oil impregnated graphite electrode
Assignee: Columbia Southern Chemical Corp
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Filing: 1958-02-20
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Granted: 1960-01-05
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Expires: 1978-02-20
Abstract
No abstract record available.
Inventors
- 👤 William W Carlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:12
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/044; G; G21; G21C; G21C19/00; G21C19/42; G21C19/44; G21C19/46; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y02W; Y02W30/00; Y02W30/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD OF PREPARING AN IMPROVED GRAPHITE ELECTRODE WHICH COMPRISES CONTACTING A GRAPHITE ELECTRODE HAVING A DRYING OIL PRESENT IN THE PORES THEREOF WITH A LIQUID MIXTURE OF ELEMENTAL CHLORINE AND BROMINE FOR BETWEEN ABOUT 30 MINUTES TO ABOUT 24 HOURS.
Claim 2
Independent Claim
41 words
A METHOD OF PREPARING AN IMPROVED GRAPHITE ELECTRODE WHICH COMPRISES CONTACTING A GRAPHITE ELECTRODE HAVING A DRYING OIL PRESENT IN THE PORES THEREOF WITH A LIQUID MIXTURE OF ELEMENTAL CHLORINE AND BROMINE FOR BETWEEN ABOUT 30 MINUTES TO ABOUT 24 HOURS.
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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |