Patent US4502981A successfully refreshed from Google Patents.
US4502981A
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US
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Enhancing conductivity of donor-doped polyacetylene
Assignee: Honeywell International Inc
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Filing: 1983-03-16
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Granted: 1985-03-05
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Expires: 2003-03-16
Abstract
Abstract Polyacetylene doped with potassium or rubidium cations (and optionally with other alkali metal cations) is heat treated at 60°-400° C., preferably 100°-250 ° C., to achieve greatly enhanced room temperature conductivity. Products with relative conductivities 150%, 300%, 450% or more of the conductivity prior to heat treating are obtained, with room-temperature conductivities of 300 S/cm, 450 S/cm, or higher.
Inventors
- 👤 Philippe G. Delannoy
- 👤 Granville G. Miller
- 👤 Helmut Eckhardt
- 👤 Ray H. Baughman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:30
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/125
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
85 words
A process for the preparation of donor-doped polyacetylene of increased conductivity which comprises heating and maintaining a potassium-doped or rubidium-doped polyacetylene at at least one elevated temperature between about 60° C. and about 400° C. and cooling back to a temperature below about 50° C., with the time at elevated temperature being sufficiently long to increase the conductivity of the potassium-doped or rubidium-doped polyacetylene (measured by the four-probe method at room temperature) to at least 150% of its conductivity prior to heating to elevated temperature.
Claim 2
Dependent Claim
85 words
A process for the preparation of donor-doped polyacetylene of increased conductivity which comprises heating and maintaining a potassium-doped or rubidium-doped polyacetylene at at least one elevated temperature between about 60° C. and about 400° C. and cooling back to a temperature below about 50° C., with the time at elevated temperature being sufficiently long to increase the conductivity of the potassium-doped or rubidium-doped polyacetylene (measured by the four-probe method at room temperature) to at least 150% of its conductivity prior to heating to elevated temperature.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the time at elevated temperature is sufficient to increase said conductivity to at least 300% of said conductivity prior to heating to elevated temperature.
Claim 4
Dependent Claim
30 words
The process of claim 2 wherein the time at elevated temperature is sufficient to increase said conductivity to at least 450% of said conductivity prior to heating to elevated temperature.
Claim 5
Dependent Claim
27 words
The process of claim 1 wherein said potassium-doped polyacetylene is of an empirical formula [CHK n ]wherein n is a number between about 0.04 and about 0.25.
Claim 6
Dependent Claim
14 words
The process of claim 4 wherein n is between about 0.15 and about 0.20.
Claim 7
Dependent Claim
18 words
The process of claim 1 wherein the potassium-doped polyacetylene is prepared by doping polyacetylene with a potassium arylate.
Claim 8
Dependent Claim
12 words
The process of claim 6 wherein said potassium arylate is potassium naphthalide.
Claim 9
Dependent Claim
19 words
The process of claim 1 wherein the potassium-doped polyacetylene is prepared by electrochemically doping polyacetylene with a potassium salt.
Claim 10
Dependent Claim
18 words
The process of claim 1 wherein said potassium-doped polyacetylene had been predominantly in the cis configuration before doping.
Claim 11
Dependent Claim
22 words
The process of claim 1 wherein said potassium-doped polyacetylene is doped with potassium cations and at least one additional alkali metal cation.
Claim 12
Dependent Claim
13 words
A donor-doped polyacetylene of increased conductivity prepared by the process of claim 10.
Claim 13
Dependent Claim
13 words
A donor-doped polyacetylene of increased conductivity prepared by the process of claim 9.
Claim 14
Dependent Claim
13 words
A donor-doped polyacetylene of increased conductivity prepared by the process of claim 4.
Claim 15
Dependent Claim
13 words
A donor-doped polyacetylene of increased conductivity prepared by the process of claim 2.
Claim 16
Dependent Claim
13 words
A donor-doped polyacetylene of increased conductivity prepared by the process of claim 1.
Claim 17
Dependent Claim
17 words
The donor-doped polyacetylene of claim 15 having a room temperature conductivity of at least about 450 S/cm.
Claim 18
Dependent Claim
17 words
The donor-doped polyacetylene of claim 15 having a room temperature conductivity of at least about 450 S/cm.
Claim 19
Dependent Claim
20 words
The donor-doped polyacetylene of claim 12 being a flexible film of room temperature conductivity of at least about 300 S/cm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |