US4603007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paste for forming a thick conductive film
Assignee: Sumitomo Metal Mining Co Ltd
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Filing: 1985-07-12
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Granted: 1986-07-29
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Expires: 2005-07-12
Abstract
Abstract A paste for forming a thick electrically conductive film, which may, for example, be used to produce a touch panel for an electric appliance, contains 40 to 55% by weight of lead borosilicate glass powder containing 1 to 5% by weight of titanium oxide, a total of 15 to 35% by weight of ruthenium oxide powder and silver and/or palladium powder, 1 to 5% by weight of bismuth oxide powder and 1 to 5% by weight of alumina powder in an organic vehicle.
Inventors
- 👤 Koushiro Shibata
- 👤 Tohru Miyoshi
- 👤 Isamu Hiraoka
- 👤 Takeshi Shimomoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:33
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/14; H01B1/16; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/102; C03C3/108; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06553; H01C17/06573; H01C17/0658
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A paste for forming a thick electrically conductive film, comprising: 40 to 55% by weight of lead borosilicate glass powder containing 1 to 5% by weight of titanium oxide; a total of 15 to 35% by weight of ruthenium oxide powder and at least one powder selected from the group consisting of silver and palladium powders; 1 to 5% by weight of bismuth oxide powder; and 1 to 5% by weight of alumina powder.
Claim 2
Dependent Claim
74 words
A paste for forming a thick electrically conductive film, comprising: 40 to 55% by weight of lead borosilicate glass powder containing 1 to 5% by weight of titanium oxide; a total of 15 to 35% by weight of ruthenium oxide powder and at least one powder selected from the group consisting of silver and palladium powders; 1 to 5% by weight of bismuth oxide powder; and 1 to 5% by weight of alumina powder.
Claim 3
Dependent Claim
31 words
A paste as set forth in claim 1, wherein said glass powder, said ruthenium oxide powder and said at least one powder constitute a total of 70 to 75% by weight.
Claim 4
Dependent Claim
29 words
A paste as set forth in claim 1 or 2, wherein said ruthenium oxide powder and said at least one powder have an approximate ratio by weight of 1:1.
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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |