US3116975A
Expired / Lapsed
US
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Artificial graphite process
Assignee: Union Carbide Corp
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Filing: 1961-02-08
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Granted: 1964-01-07
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Expires: 1981-02-08
Abstract
No abstract record available.
Inventors
- 👤 Chester B Cross
- 👤 Donald R Ecker
- 👤 Ora L Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:01
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/04; H01K1/06; D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/16; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10S60/00; Y10S60/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN A PROCESS FOR GRAPHITIZING FLEXIBLE CARBONACEOUS MATERIAL BY SUBJECTING SAID MATERIAL TO GRAPHITIZING TEMPERATURE IN A GRAPHITIZING FURNACE, SAID FLEXIBLE CARBONACEOUS MATERIAL BEING CARBONIZED FLEXIBLE CELLULOSIC TEXTILE MATERIAL; THE IMPROVEMENT WHICH COMPRISES CONTINOUSLY PURGING SAID FURNANCE WITH A NON-OXIDIZING AND NON-CARBONACEOUS GAS, SAID PURGING GAS BEING IMPINGED IN LARGE VOLUMES IN A SWEEPING MANNER AGAINST THE SURFACE OF SAID MATERIAL BEING GRAPHITIZED, AT ALL TIMES THAT SAID TEMPERATURE IS ABOVE ABOUT 700*C. UNTIL COMPLETE GRAPHITIZATION THEREOF HAS OCCURED.
Claim 2
Dependent Claim
79 words
IN A PROCESS FOR GRAPHITIZING FLEXIBLE CARBONACEOUS MATERIAL BY SUBJECTING SAID MATERIAL TO GRAPHITIZING TEMPERATURE IN A GRAPHITIZING FURNACE, SAID FLEXIBLE CARBONACEOUS MATERIAL BEING CARBONIZED FLEXIBLE CELLULOSIC TEXTILE MATERIAL; THE IMPROVEMENT WHICH COMPRISES CONTINOUSLY PURGING SAID FURNANCE WITH A NON-OXIDIZING AND NON-CARBONACEOUS GAS, SAID PURGING GAS BEING IMPINGED IN LARGE VOLUMES IN A SWEEPING MANNER AGAINST THE SURFACE OF SAID MATERIAL BEING GRAPHITIZED, AT ALL TIMES THAT SAID TEMPERATURE IS ABOVE ABOUT 700*C. UNTIL COMPLETE GRAPHITIZATION THEREOF HAS OCCURED.
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) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |