Patent US4734220A successfully refreshed from Google Patents.
US4734220A
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Fusible electroconductive mixtures
Assignee: Bayer AG
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Filing: 1987-02-19
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Granted: 1988-03-29
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Expires: 2007-02-19
Abstract
Abstract The invention concerns fusible mixtures of high electroconductivity which consist of (a) 0.5 to 99% by weight, relative to the total weight of the mixture, of a TCNQ complex of the formula ##STR1## in which R and R 1 independently of each other stand for an optionally substituted aliphatic, cycloaliphatic or araliphatic radical having 1 to 30 C atoms and n is 1, 2 or 3 or a fraction between these numbers and (b) 99.5 to 1% by weight, relative to the total weight of the mixture, of one or more special liquid organic compounds.
Inventors
- 👤 Friedrich Jonas
- 👤 Rolf Dhein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:17
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/121
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
A fusible mixture of high electroconductivity consisting of (a) 0.5 to 99% by weight, relative to the total weight of the mixture, of a TCNQ complex of the formula ##STR6## in which R and R 1 independently of each other stand for an optionally substituted aliphatic, cycloaliphatic or araliphatic radical having 1 to 30 C atoms and n is 1, 2 or 3 or any fraction between these numbers and (b) 99.5 to 1% by weight, relative to the total weight of the mixture of one or more of the following liquid organic compounds: N-methylpyrrolidone, N-methylcaprolactam, γ-butyrolactone, caprolactone, dipentyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, 1,4,7,10,13-pentaoxacyclopentadecane, 1,4,7,10-tetraoxacyclododecane, dimethyl sulphoxide, diethyl sulphoxide, tetramethylene sulphone tetramethylurea and/or propylene carbonate.
Claim 2
Dependent Claim
120 words
A fusible mixture of high electroconductivity consisting of (a) 0.5 to 99% by weight, relative to the total weight of the mixture, of a TCNQ complex of the formula ##STR6## in which R and R 1 independently of each other stand for an optionally substituted aliphatic, cycloaliphatic or araliphatic radical having 1 to 30 C atoms and n is 1, 2 or 3 or any fraction between these numbers and (b) 99.5 to 1% by weight, relative to the total weight of the mixture of one or more of the following liquid organic compounds: N-methylpyrrolidone, N-methylcaprolactam, γ-butyrolactone, caprolactone, dipentyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, 1,4,7,10,13-pentaoxacyclopentadecane, 1,4,7,10-tetraoxacyclododecane, dimethyl sulphoxide, diethyl sulphoxide, tetramethylene sulphone tetramethylurea and/or propylene carbonate.
Claim 3
Dependent Claim
29 words
The fusible mixture of claim 1, wherein the amount of component (a) is 30 to 80% by weight and the amount of component (b) is 70 to 20% .
Claim 4
Dependent Claim
27 words
The fusible mixture of claim 1, wherein the liquid organic compound is N-methylpyrrolidone, N-methylcaprolactam, γ-butyrolactone, caprolactone, tetramethylene sulphone, propylene carbonate and/or a mixture of these stated compounds.
References Cited (Backward Citations)
US3424698A
Cited
US4500459A
Cited
US4478751A
Cited
US4529538A
Cited
US4568494A
Cited
US4568485A
Cited
US4663078A
Cited
US4622266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |