US2653878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of electrodes
Assignee: Elektrokemisk AS
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Filing: 1949-11-18
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Granted: 1953-09-29
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Expires: 1969-11-18
Abstract
No abstract record available.
Inventors
- 👤 Sejersted Johannes
- 👤 Bockman Oluf Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:49
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12; C25C3/125; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/044; H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; H05B7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD OF PREPARING MIXES FOR USE IN ELECTRODES WHICH COMPRISES SELECTING BITUMINUOUS PITCH AS A BINDER MATERIAL, CARBONIZING A SAMPLE OF SUCH BINDER MATERIAL, CARBONIZING A SAMPLE TEMPERATURE AT WHICH THE ELECTRODE IS TO BE CARBONIZED, TESTING THE REACTIVITY OF SUCH SAMPLE TO CO2 AS HEREIN DEFINED, CALCINING DRY MATERIAL SELECTED FROM THE GROUP CONSISTING OF PITCH COKE, PETROLEUM COKE AND PURIFIED ANTHRACITE AT A TEMPERATURE BELOW 1200* C. AND AT A TEMPERATURE LOW ENOUGH SO THAT THE REACTIVITY THEREOF TO CO2 AS HEREIN DEFINED IS AT LEAST 75% OF THE REACTIVITY OF THE TEST SAMPLE OF BINDER MATERIAL AND COMBINING SUCH DRY MATERIAL IN POWDERED FORM WITH THE BINDER MATERIAL.
Claim 2
Independent Claim
112 words
A METHOD OF PREPARING MIXES FOR USE IN ELECTRODES WHICH COMPRISES SELECTING BITUMINUOUS PITCH AS A BINDER MATERIAL, CARBONIZING A SAMPLE OF SUCH BINDER MATERIAL, CARBONIZING A SAMPLE TEMPERATURE AT WHICH THE ELECTRODE IS TO BE CARBONIZED, TESTING THE REACTIVITY OF SUCH SAMPLE TO CO2 AS HEREIN DEFINED, CALCINING DRY MATERIAL SELECTED FROM THE GROUP CONSISTING OF PITCH COKE, PETROLEUM COKE AND PURIFIED ANTHRACITE AT A TEMPERATURE BELOW 1200* C. AND AT A TEMPERATURE LOW ENOUGH SO THAT THE REACTIVITY THEREOF TO CO2 AS HEREIN DEFINED IS AT LEAST 75% OF THE REACTIVITY OF THE TEST SAMPLE OF BINDER MATERIAL AND COMBINING SUCH DRY MATERIAL IN POWDERED FORM WITH THE BINDER MATERIAL.
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) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |