Patent US4972845A successfully refreshed from Google Patents.
US4093358A
Expired / Lapsed
US
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High efficiency electrochromic display device
Assignee: International Business Machines Corp
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Filing: 1976-12-27
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Granted: 1978-06-06
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Expires: 1996-12-27
Abstract
Abstract This invention relates to a reversible display device based upon the electrochromic properties of triaryl pyrazoline compounds when used in conjunction with a complementary redox material.
Inventors
- 👤 Meredith David Shattuck
- 👤 Glenn Tavernia Sincerbox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:26
CPC Classifications
C; C09; C09K; C09K9/00; C09K9/02; G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1503
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
In a reversible electrochromic display device comprising a reactive medium between two electrically conductive electrodes, at least one of which is transparent, said medium comprising an anhydrous solvent and an oxidant/reductant pair wherein the reductant is an electron acceptor, the improvement according to which the oxidant is a triaryl pyrazoline compound having the formula: ##STR2## wherein A, A 1 and A 2 are each phenyl or phenyl substituted with an electron releasing group, and n is zero or one.
Claim 2
Dependent Claim
79 words
In a reversible electrochromic display device comprising a reactive medium between two electrically conductive electrodes, at least one of which is transparent, said medium comprising an anhydrous solvent and an oxidant/reductant pair wherein the reductant is an electron acceptor, the improvement according to which the oxidant is a triaryl pyrazoline compound having the formula: ##STR2## wherein A, A 1 and A 2 are each phenyl or phenyl substituted with an electron releasing group, and n is zero or one.
Claim 3
Dependent Claim
18 words
A device as claimed in claim 1 wherein the oxidant is a 1, 3, 5-triphenyl-Δ 2 -pyrazoline compound.
Claim 4
Dependent Claim
17 words
A device as claimed in claim 1 wherein the oxidant is a 1, 5-diphenyl-3-styryl-Δ 2 -pyrazoline compound.
Claim 5
Dependent Claim
13 words
A device as claimed in claim 1 wherein the oxidant is 1-p-methoxyphenyl-3-p-diethylaminostyryl-5-p-diethylamino-phenyl-Δ.sup.2 -pyrazoline.
Claim 6
Dependent Claim
14 words
A device as claimed in claim 1 wherein the oxidant is 1-phenyl-3-p-diethylaminostyryl-5-p-diethylaminophenyl-Δ 2 -pyrazoline.
Claim 7
Dependent Claim
14 words
A device as claimed in claim 1 wherein the oxidant is 1-phenyl-3-p-dimethylaminostyryl-5-p-dimethylaminophenyl-Δ 2 -pyrazoline.
Claim 8
Dependent Claim
13 words
A device as claimed in claim 1 wherein the oxidant is 1-p-methoxyphenyl-3-p-dipropylaminostyryl-5-p-dipropylaminophenyl-Δ.sup.2 -pyrazoline.
Claim 9
Dependent Claim
14 words
A device as claimed in claim 1 wherein the oxidant is 1-phenyl-3-p-dipropylaminostyryl-5-p-dipropylaminophenyl-Δ 2 -pyrazoline.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |