US4619704A
Expired / Lapsed
US
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Composition for forming a transparent conductive film
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1984-12-12
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Granted: 1986-10-28
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Expires: 2004-12-12
Abstract
Abstract A composition for forming a transparent conductive film obtained by mixing an organic solution comprising an indium salt of inorganic acid and a tin salt of an inorganic acid with a non-aqueous silica sol. The composition of the present invention shows excellent stability with a lapse of time and good wettability to a substrate plate. A transparent conductive film obtained shows a strong adhesion strength to a substrate plate and has a two-layered structure.
Inventors
- 👤 Tadanori Hashimoto
- 👤 Hiroshi Yoshitake
- 👤 Shigenao Hata
- 👤 Akiko Nakazono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:52
CPC Classifications
C; C08; C08J; C08J5/00; H; H10; H10H; H10H20/00; H10H20/80; H10H20/83; H10H20/832; H10H20/833; H01; H01B; H01B1/00; H01B1/14; H01B1/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
A composition for forming a transparent conductive film comprising a mixture of an organic solution of an indium salt of an inorganic acid and a tin salt of an inorganic acid with a non-aqueous silica sol wherein said composition contains about 0.5% to about 30% by weight of said indium salt of inorganic acid calculated as indium oxide, about 0.5% to about 30% by weight of said tin salt of inorganic acid in terms of the proportion of tin to indium, and about 1% to about 200% by weight of said non-aqueous silica sol in terms of the proportion of SiO 2 to indium oxide.
Claim 2
Dependent Claim
105 words
A composition for forming a transparent conductive film comprising a mixture of an organic solution of an indium salt of an inorganic acid and a tin salt of an inorganic acid with a non-aqueous silica sol wherein said composition contains about 0.5% to about 30% by weight of said indium salt of inorganic acid calculated as indium oxide, about 0.5% to about 30% by weight of said tin salt of inorganic acid in terms of the proportion of tin to indium, and about 1% to about 200% by weight of said non-aqueous silica sol in terms of the proportion of SiO 2 to indium oxide.
Claim 3
Dependent Claim
46 words
A composition as claimed in claim 1, wherein said non-aqueous silica sol is one prepared by liquid-phase neutralization of an aqueous solution containing sodium silicate with a mineral acid and subjecting the neutralized solution to salting-out with a salting-out agent and extraction with an organic solvent.
Claim 4
Dependent Claim
33 words
A composition as claimed in claim 1, wherein a cellulose compound is added to said composition as an thickener in an amount of about 0.1% to about 50% by weight in said composition.
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) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |