US5223479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing alkali metal-doped fullerenes
Assignee: TRUSTEES OF UNIVERSITY OF PENNSYLVANIA A NON-PROFIT CORP OF PENNSYLVANIA
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Filing: 1991-08-01
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Granted: 1993-06-29
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Expires: 2011-08-01
Abstract
Abstract Superconducting, metal-doped fullerenes are provided, along with processes for their preparation in relatively high stoichiometric purity. In one embodiment, the processes provide fullerenes of the formula M 3 C 60 where M is an alkali metal. The processes comprise contacting C 60 with alkali metal in an amount and under reaction conditions effective to produce a compound having the formula M y C 60 , where y is greater than 3, and contacting said M y C 60 with a portion of C 60 in an amount and under reaction conditions effective to produce said M 3 C 60 .
Inventors
- 👤 John P. McCauley, Jr.
- 👤 Qing Zhu
- 👤 Gavin Vaughan
- 👤 Nicole Coustel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:37
CPC Classifications
B; B82; B82Y; B82Y30/00; B82Y40/00; C; C01; C01B; C01B32/00; C01B32/15; C01B32/152; C01B32/156; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/775; Y10S505/80; Y10S505/81; Y10S505/815
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A process for preparing a compound having the formula M 3 C 60 where M is a metal selected from lithium, sodium, potassium, rubidium, cesium, francium, or combinations thereof, comprising the steps of: contacting C 60 with said metal in an amount and under reaction conditions effective to produce a compound having the formula M y C 60 where y is greater than 3; and contacting said M y C 60 with C 60 in an amount and under reaction conditions effective to produce said M 3 C 60 .
Claim 2
Dependent Claim
90 words
A process for preparing a compound having the formula M 3 C 60 where M is a metal selected from lithium, sodium, potassium, rubidium, cesium, francium, or combinations thereof, comprising the steps of: contacting C 60 with said metal in an amount and under reaction conditions effective to produce a compound having the formula M y C 60 where y is greater than 3; and contacting said M y C 60 with C 60 in an amount and under reaction conditions effective to produce said M 3 C 60 .
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein M is potassium, rubidium, cesium, or combinations thereof.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein 1 equivalent of said C 60 is contacted with at least 6 equivalents of said metal.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein said C 60 is contacted with said metal at a temperature from about 150° C. to about 450° C.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein said C 60 is contacted with said metal at a temperature about 250° C.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein y is about 3 to about 12.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein y is about 4 to about 8.
Claim 9
Dependent Claim
10 words
The process of claim 1 wherein y is about 6.
Claim 10
Dependent Claim
24 words
The process of claim 1 wherein on equivalent of said M y C 60 is contacted with 1 equivalent of said C 60 .
Claim 11
Dependent Claim
28 words
The process of claim 1 wherein said M y C 60 is contacted with said C 60 at a temperature from about 150° C. to about 450° C.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein said M y C 60 is contacted with said C 60 at a temperature about 350° C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |