Patent US4119655A successfully refreshed from Google Patents.
US4119655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel graphite intercalation compounds and method of making same
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1977-01-17
•
Granted: 1978-10-10
•
Expires: 1997-01-17
Abstract
Abstract Novel intercalates of graphite are prepared by reacting graphite with a Lewis acid fluoride and ClF 3 in the presence of HF. These compounds are particularly useful as battery cathodes.
Inventors
- 👤 Roger Hulme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:32
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; C; C01; C01B; C01B32/00; C01B32/20; C01B32/21; C01B32/22; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; H01M4/5835; H01M4/587; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
70 words
A method of preparing intercalates of graphite comprising contacting graphite with a Lewis acid and ClF 3 in the presence of HF at a temperature in the range of from about -80° to +100° C for a time sufficient for intercalation to occur, said Lewis acid being a fluoride of an element selected from B, Si, Ge, Sn, Pb, P, As, Sb, Bi, Ti, Zr, Hf, V, Nb and Ta.
Claim 2
Independent Claim
70 words
A method of preparing intercalates of graphite comprising contacting graphite with a Lewis acid and ClF 3 in the presence of HF at a temperature in the range of from about -80° to +100° C for a time sufficient for intercalation to occur, said Lewis acid being a fluoride of an element selected from B, Si, Ge, Sn, Pb, P, As, Sb, Bi, Ti, Zr, Hf, V, Nb and Ta.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein ClF 3 , the Lewis acid fluoride and HF are in stoichiometric excess with respect to graphite.
Claim 4
Dependent Claim
18 words
The method of claim 2 wherein ClF 3 and Lewis acid are in the mole ratio of 1:1.
Claim 5
Dependent Claim
20 words
The method of claim 3 wherein HF is in such sufficiently large excess as to serve as a reaction diluent.
Claim 6
Dependent Claim
13 words
The method of claim 3 wherein the Lewis acid is BF 3 .
Claim 7
Dependent Claim
13 words
The method of claim 3 wherein the Lewis acid is PF 5 .
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein the Lewis acid is AsF 5 .
Claim 9
Dependent Claim
28 words
The method of claim 1 wherein the Lewis acid fluoride is a pentafluoride generated in situ by the reaction of ClF 3 with a trifluoride of said element.
Claim 10
Dependent Claim
41 words
The method of claim 1 wherein the Lewis acid fluoride is generated in situ by the reaction of ClF 3 and an element selected from B, Si, Ge, Sn, Pb, P, As, Sb, Bi, Ti, Zr, Hf, V, Nb and Ta.
Claim 11
Dependent Claim
55 words
A blue compound of graphite consisting essentially of graphite, ClF 3 , HF and a Lewis acid fluoride of an element selected from B, Si, Ge, Sn, Pb, P, As, Sb, Bi, Ti, Zr, Hf, V, Nb and Ta, said graphite being present in an amount ranging from about 30 to about 55 weight %.
Claim 12
Dependent Claim
55 words
A blue compound of graphite consisting essentially of graphite, ClF 3 , HF and a Lewis acid fluoride of an element selected from B, Si, Ge, Sn, Pb, P, As, Sb, Bi, Ti, Zr, Hf, V, Nb and Ta, said graphite being present in an amount ranging from about 30 to about 55 weight %.
Claim 13
Dependent Claim
14 words
The compound of claim 10 wherein the Lewis acid fluoride is BF 3 .
Claim 14
Dependent Claim
14 words
The compound of claim 10 wherein the Lewis acid fluoride is AsF 5 .
Claim 15
Dependent Claim
14 words
The compound of claim 10 wherein the Lewis acid fluoride is PF 5 .
References Cited (Backward Citations)
US3956194A
Cited
US4035434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |