US3872032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of graphite fluoride
Assignee: Nippon Carbon Co Ltd
•
Filing: 1973-02-08
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Granted: 1975-03-18
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Expires: 1993-02-08
Abstract
Abstract A process for the preparation of a white-colored graphite fluoride by reacting carbon with a fluorine material containing not more than 5% by volume of hydrogen fluoride.
Inventors
- 👤 Toyonosuke Kanemaru
- 👤 Toshio Shimada
- 👤 Isao Inudow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:01
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
A PROCESS FOR THE PRREPARATION OF A WHITE-COLORED, INORGANIC, HIGH MOLECULAR WEIGHT GRAPHITE FLUORIDE HAVING A CARBON-TO-FLUORINE ATOMIC RATIO OF 1:1, COMPRISING REACTING A NON-CRYSTALLINE CARBON SELECTED FROM THE GROUP CONSISTING OF COKE, CARBON BLACK, CHARCOAL AND CARBONIZED SUGAR WITH A FLUORINE MATERIAL CONSISTING ESSENTIALLY OF FLUORINE AND HYDROGEN FLUORIDE, SAID HYDROGEN FLUORIDE BEING PRESENT IN AN AMOUNT NOT MORE THAN 5% BY VOLUME, OF SAID FLUORINE, FOR A SUFFICIENT TIME TO OBTAIN THE GRAPHITE FLUORIDE.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE PRREPARATION OF A WHITE-COLORED, INORGANIC, HIGH MOLECULAR WEIGHT GRAPHITE FLUORIDE HAVING A CARBON-TO-FLUORINE ATOMIC RATIO OF 1:1, COMPRISING REACTING A NON-CRYSTALLINE CARBON SELECTED FROM THE GROUP CONSISTING OF COKE, CARBON BLACK, CHARCOAL AND CARBONIZED SUGAR WITH A FLUORINE MATERIAL CONSISTING ESSENTIALLY OF FLUORINE AND HYDROGEN FLUORIDE, SAID HYDROGEN FLUORIDE BEING PRESENT IN AN AMOUNT NOT MORE THAN 5% BY VOLUME, OF SAID FLUORINE, FOR A SUFFICIENT TIME TO OBTAIN THE GRAPHITE FLUORIDE.
Claim 3
Dependent Claim
13 words
A process according to claim 1, wherein the hydrogen fluoride content is 1-3%.
Claim 4
Dependent Claim
16 words
A process according to claim 1, wherein the reaction is effected at a temperature between 300*-450*C.
Claim 5
Dependent Claim
14 words
A process according to claim 1, wherein the reaction time is 1/2 -10 hours.
Claim 6
Dependent Claim
16 words
A process according to claim 1, wherein the reaction is effected at a temperature between 350*-400*C.
Claim 7
Dependent Claim
13 words
A process according to claim 6, wherein the reaction time is 5-7 hours.
References Cited (Backward Citations)
US3397087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |