Patent US2820728A successfully refreshed from Google Patents.
US2820728A
Expired / Lapsed
US
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Method of treating carbon electrodes with polymerizable oil
Assignee: Diamond Shamrock Corp
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Filing: 1955-06-21
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Granted: 1958-01-21
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Expires: 1975-06-21
Abstract
No abstract record available.
Inventors
- 👤 Jr John C Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:27
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
THE METHOD OF TREATING A CARBON ELECTRODE WHICH OIL AND EFFECTING POLYMERIZATION OF TSAID OIL IN SITU UNDER SUBSTANTIALLY NON-OXIDATIVE CONDITIONS WITH THE AID OF HEAT AT AN ELEVATED TEMPERATURE LOW ENOUGH TO PRECLUDE DISRUPTION OF POLYMERIZATION BONDS FORMED AS THE OIL POLYMERIZES.
Claim 2
Independent Claim
43 words
THE METHOD OF TREATING A CARBON ELECTRODE WHICH OIL AND EFFECTING POLYMERIZATION OF TSAID OIL IN SITU UNDER SUBSTANTIALLY NON-OXIDATIVE CONDITIONS WITH THE AID OF HEAT AT AN ELEVATED TEMPERATURE LOW ENOUGH TO PRECLUDE DISRUPTION OF POLYMERIZATION BONDS FORMED AS THE OIL POLYMERIZES.
References Cited (Backward Citations)
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US2146099A
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US2204252A
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US2304087A
Cited
US2368306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |