US4749514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite intercalation compound film and method of preparing the same
Assignee: Japan Science and Technology Agency
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Filing: 1986-10-03
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Granted: 1988-06-07
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Expires: 2006-10-03
Abstract
Abstract This invention relates to a graphite intercalation compound in the form of a film, which is obtained by intercalating a donor type, an acceptor type or a covalent type material between the layers of graphite film obtained by thermal treatment of poly(phenylene oxadiazole). The obtained intercalated graphite film has a large scale area and has an extremely improved stability compared with known graphite intercalation compounds.
Inventors
- 👤 Mutsuaki Murakami
- 👤 Kazuhiro Watanabe
- 👤 Susumu Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:24
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/20; C01B32/21; C01B32/22; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
A graphite intercalation compound in the form of a film, which comprises an intercalant inserted between the aromatic layers of a graphitized film obtained by heat treatment of a polyphenyleneoxadiazole film under graphitization conditions including a temperature of at least 1600° C.
Claim 2
Dependent Claim
42 words
A graphite intercalation compound in the form of a film, which comprises an intercalant inserted between the aromatic layers of a graphitized film obtained by heat treatment of a polyphenyleneoxadiazole film under graphitization conditions including a temperature of at least 1600° C.
Claim 3
Dependent Claim
65 words
A graphite intercalation compound in the form of a film according to claim 1, wherein the intercalant is selected from the group consisting of Li, K, Rb, Cs, Ba, Ca, Mn, Fe, Ni, Co, Cu, Mo, K-NH 3 , Li-NH 3 , Rb-NH 3 , Cs-NH 3 , Ba-NH 3 , Ca-NH 3 , K-H, K-D, Li-THF, Na-THF, K-THF, K-C 6 H 6 and K-DMSO.
Claim 4
Dependent Claim
75 words
A graphite intercalation compound in the form of a film according to claim 1, wherein the intercalant is selected from the group consisting of Br, ICl, IBr, MnCl 2 , MoCl 2 , FeCl 2 , FeCl 3 , CuCl 2 , NiCl 2 , NbCl 5 , UCl 5 , AlCl 3 , AsF 5 , SbF 5 , HNO 3 , H 2 SO 4 , SO 3 - HClO 4 and HF.
Claim 5
Dependent Claim
27 words
A graphite intercalation compound in the form of a film according to claim 1, wherein the intercalant is selected from the group consisting of F and O.(OH).
Claim 6
Independent Claim
52 words
A method of preparing a graphite intercalation compound in the form of a film, which method comprises the steps of: heat treating a polyphenuleneoxadiazole film under graphitization conditions including a temperature of at least 1600° C. to obtain a graphitized film, and inserting an intercalant between the layers of the graphitized film.
Claim 7
Independent Claim
52 words
A method of preparing a graphite intercalation compound in the form of a film, which method comprises the steps of: heat treating a polyphenuleneoxadiazole film under graphitization conditions including a temperature of at least 1600° C. to obtain a graphitized film, and inserting an intercalant between the layers of the graphitized film.
References Cited (Backward Citations)
US4565649A
Cited
US4213956A
Cited
US4461719A
Cited
US4515709A
Cited
JPS59105029A
Cited
US4645620A
Cited
US4599193A
Cited
JPS60115415A
Cited
US4608192A
Cited
US4620943A
Cited
US4632775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |