US3333926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for carbonizing cellulosic textile materials
Assignee: Union Carbide Corp
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Filing: 1963-10-30
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Granted: 1967-08-01
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Expires: 1983-10-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph O Moyer
- 👤 Donald R Ecker
- 👤 Jr William J Spry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:36
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/16; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR THE PRODUCTION OF FLEXIBLE FIBROUS GRAPHITE FROM FLEXIBLE CELLULOSIC TEXTILE MATERIAL WHICH COMPRISES CARBONIZING SAID CELLULOSIC MATERIAL IN A BAKING OVEN, SAID BAKING OVEN BEING PROVIDED WITH AN OXYGENFREE, NON-CARBONACEOUS GASEOUS ATMOSPHERE CONTAINING AT LEAST ABOUT 5% OF A HALOGEN GAS WHILE SAID TEMPERATURE IS BETWEEN APPROXIMATELY ROOM TEMPERATURE AND 650*C., PURGING SAID ATMOSPHERE WITH A NON-OXIDIZING, NON-CARBONACEOUS, HALOGEN-FREE GAS, AND CONTINUING CARBONIZATION TO ABOUT 800*C., AND SUBSEQUENTLY GRAPHITIZING SAID CARBONIZED MATERIAL IN AN ELECTRIC FURNACE WHILE CONTINUOUSLY SWEEPING THE SURFACE OF SAID MATERIAL WITH AN OXYGEN-FREE, NON-CARBONACEOUS GASEOUS ATMOSPHERE CONTAINING AT LEAST ABOUT 5% OF A HALOGEN GAS AT TEMPERATURES FROM ABOUT 800*C. UNTIL SUBSTANTIALLY COMPLETE GRAPHITIZATION HAS OCCURRED.
Claim 2
Dependent Claim
113 words
A PROCESS FOR THE PRODUCTION OF FLEXIBLE FIBROUS GRAPHITE FROM FLEXIBLE CELLULOSIC TEXTILE MATERIAL WHICH COMPRISES CARBONIZING SAID CELLULOSIC MATERIAL IN A BAKING OVEN, SAID BAKING OVEN BEING PROVIDED WITH AN OXYGENFREE, NON-CARBONACEOUS GASEOUS ATMOSPHERE CONTAINING AT LEAST ABOUT 5% OF A HALOGEN GAS WHILE SAID TEMPERATURE IS BETWEEN APPROXIMATELY ROOM TEMPERATURE AND 650*C., PURGING SAID ATMOSPHERE WITH A NON-OXIDIZING, NON-CARBONACEOUS, HALOGEN-FREE GAS, AND CONTINUING CARBONIZATION TO ABOUT 800*C., AND SUBSEQUENTLY GRAPHITIZING SAID CARBONIZED MATERIAL IN AN ELECTRIC FURNACE WHILE CONTINUOUSLY SWEEPING THE SURFACE OF SAID MATERIAL WITH AN OXYGEN-FREE, NON-CARBONACEOUS GASEOUS ATMOSPHERE CONTAINING AT LEAST ABOUT 5% OF A HALOGEN GAS AT TEMPERATURES FROM ABOUT 800*C. UNTIL SUBSTANTIALLY COMPLETE GRAPHITIZATION HAS OCCURRED.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |