Patent US3868534A successfully refreshed from Google Patents.
US3868534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemiluminescent device having a mixed solvent
Assignee: Nortel Networks Technology Corp
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Filing: 1972-11-29
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Granted: 1975-02-25
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Expires: 1992-11-29
Abstract
Abstract The use of a solvent comprising a mixture of an aprotic solvent and an aromatic solvent in an electrochemical-luminescent device results in an increased luminance, an increased concentration of the fluorescent compound, and an increased efficiency.
Inventors
- 👤 Albert Pighin
- 👤 Robert Alvin Creswell
- 👤 Douglas Peter Malanka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:09
CPC Classifications
F; F21; F21K; F21K2/00; F21K2/06; F21K2/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
AN ELECTROCHEMICAL LUMINESCENT DEVICE COMPRISING: A SUPPORT PLATE; AND ELECTRODE ARRAY ON SAID SUPPORT PLATE, SAID ARRAY COMPRISING AT LEAST ONE ELECTRODE, ELECTRICAL CONDUCT MEANS CONNECTED TO SAID ELECTRODE ARRAY; A TRANSPARENT COVER PLATE SPACED FROM SAID SUPPORT PLATE AND ELECTRODE ARRAY; A SPACING MEMBER EXTENDING BETWEEN SAID SUPPORT PLATE AND SAID COVER PLATE TO DEFINE A SEALED SPACE BETWEEN SAID ELECTRODE ARRAY AND SAID COVER PLATE; A COUNTER ELECTRODE IN SAID SEALED SPACE; ELECTRICAL CONDUCTOR MEANS CONNECTED TO SAID COUNTER ELECTRODE; AND AN ELECTROCHEMICAL LUMINESCENT SOLUTION IN SAID SEALED SPACE, SAID LUMINESCENT SOLUTION COMPRISING A MIXTURE OF A FLUORESCENT COMPOUND, A SOLVENT FOR THE FLUORESCENT COMPOUND, AND A ELECTROLYTE, THE SOLVENT BEING A MIXTURE OF AN APROTIC SOLVENT AND AN AROMATIC SOLVENT.
Claim 2
Dependent Claim
123 words
AN ELECTROCHEMICAL LUMINESCENT DEVICE COMPRISING: A SUPPORT PLATE; AND ELECTRODE ARRAY ON SAID SUPPORT PLATE, SAID ARRAY COMPRISING AT LEAST ONE ELECTRODE, ELECTRICAL CONDUCT MEANS CONNECTED TO SAID ELECTRODE ARRAY; A TRANSPARENT COVER PLATE SPACED FROM SAID SUPPORT PLATE AND ELECTRODE ARRAY; A SPACING MEMBER EXTENDING BETWEEN SAID SUPPORT PLATE AND SAID COVER PLATE TO DEFINE A SEALED SPACE BETWEEN SAID ELECTRODE ARRAY AND SAID COVER PLATE; A COUNTER ELECTRODE IN SAID SEALED SPACE; ELECTRICAL CONDUCTOR MEANS CONNECTED TO SAID COUNTER ELECTRODE; AND AN ELECTROCHEMICAL LUMINESCENT SOLUTION IN SAID SEALED SPACE, SAID LUMINESCENT SOLUTION COMPRISING A MIXTURE OF A FLUORESCENT COMPOUND, A SOLVENT FOR THE FLUORESCENT COMPOUND, AND A ELECTROLYTE, THE SOLVENT BEING A MIXTURE OF AN APROTIC SOLVENT AND AN AROMATIC SOLVENT.
Claim 3
Dependent Claim
21 words
A device as claimed in claim 1, the aprotic solvent being one selected from amides, nitriles, ethers, sulfoxides, carbonates and amines.
Claim 4
Dependent Claim
18 words
A device as claimed in claim 1, the aprotic solvent being one selected from acetonitrile, benzonitrile, and N,N''-dimethylformamide.
Claim 5
Dependent Claim
18 words
A device as claimed in claim 1, the aromatic solvent being one selected from benzene, toluene, and xylene.
Claim 6
Dependent Claim
17 words
A device as claimed in claim 1, the fluorescent compound selected from substituted metal chelates and porphyrins.
Claim 7
Dependent Claim
13 words
A device as claimed in claim 1, the fluorescent compound composed of rubrene.
Claim 8
Dependent Claim
51 words
A device as claimed in claim 1, the fluorescent compound composed of rubrene; the solvent a mixture of N,N''-dimethylformamide and benzene in a 1:1 ratio; and the electrolyte of tetra-n-butylammonium perchlorate, the proportions of electrolyte and fluorescent compound in the range: electrolyte 10 to 100 millimolar and fluorescent compound 10 millimolar.
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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |