US2992901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of artificial graphite
Assignee: Union Carbide Corp
•
Filing: 1958-04-29
•
Granted: 1961-07-18
•
Expires: 1978-04-29
Abstract
No abstract record available.
Inventors
- 👤 Richard S Fisher
- 👤 Elizabeth M Gartland
- 👤 Isaac P Mail
- 👤 Harry C Stieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:08
CPC Classifications
C; C01; C01B; C01B32/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A METHOD FOR PRODUCING A FORMED, ARTIFICIAL GRAPHITE ARTICLE WHICH COMPRISES PREPARING A MIX OF COMMINUTED CARBON AND CARBONIZABLE BINDER MATERIAL, FORMING AN ARTICLE OF DESIRED SHAPE FROM SAID MIX, BAKING THE ARTICLE SO FORMED TO CARBONIZE SAID BINDER MATERIAL, AND GRAPHITIZING THE FORMED, BAKED ARTICLE BY HEATING TO GRAPHITIZING TEMPERATURE, SAID ARTICLE CONTAINING DURING GRAPHITIZATION SILICON CARBIDE AND AT LEAST ONE CARBIDE SELECTED FROM THE GROUP CONSISTING OF TITANIUM CARBIDE, BORON CARBIDE, MOLYBDENUM CARBIDE, NIOBIUM CARBIDE, VANADIUM CARBIDE AND ZIRCONIUM CARBIDE, SAID SILICON CARBIDE BEING PRESENT IN AN AMOUNT OF AT LEAST 4% BY WEIGHT OF SAID ARTICLE AND SAID SELECTED CARBIDE BEING PRESENT IN AN AMOUNT OF AT LEAST 5% BY WEIGHT OF SAID ARTICLE, AT LEAST SAID SELECTED CARBIDE OF SAID GROUP HAVING BEEN PROVIDED IN SAID ARTICLE PRIOR TO GRAPHITIZATION.
Claim 2
Independent Claim
134 words
A METHOD FOR PRODUCING A FORMED, ARTIFICIAL GRAPHITE ARTICLE WHICH COMPRISES PREPARING A MIX OF COMMINUTED CARBON AND CARBONIZABLE BINDER MATERIAL, FORMING AN ARTICLE OF DESIRED SHAPE FROM SAID MIX, BAKING THE ARTICLE SO FORMED TO CARBONIZE SAID BINDER MATERIAL, AND GRAPHITIZING THE FORMED, BAKED ARTICLE BY HEATING TO GRAPHITIZING TEMPERATURE, SAID ARTICLE CONTAINING DURING GRAPHITIZATION SILICON CARBIDE AND AT LEAST ONE CARBIDE SELECTED FROM THE GROUP CONSISTING OF TITANIUM CARBIDE, BORON CARBIDE, MOLYBDENUM CARBIDE, NIOBIUM CARBIDE, VANADIUM CARBIDE AND ZIRCONIUM CARBIDE, SAID SILICON CARBIDE BEING PRESENT IN AN AMOUNT OF AT LEAST 4% BY WEIGHT OF SAID ARTICLE AND SAID SELECTED CARBIDE BEING PRESENT IN AN AMOUNT OF AT LEAST 5% BY WEIGHT OF SAID ARTICLE, AT LEAST SAID SELECTED CARBIDE OF SAID GROUP HAVING BEEN PROVIDED IN SAID ARTICLE PRIOR TO GRAPHITIZATION.
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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |