US4495524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Part for a slide variable resistor
Assignee: Nitto Denko Corp
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Filing: 1983-06-21
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Granted: 1985-01-22
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Expires: 2003-06-21
Abstract
Abstract A part for a slide variable resistor provided on an insulated support thereof with a film resistive layer adapted for a slide terminal to be slid along the surface thereof, which part is characterized in that said film resistive layer comprises a main resistive layer pattern bound to the insulated support and a protective resistive layer pattern coated on said main resistive layer pattern, wherein the protective resistive layer pattern has a larger sheet resistivity than said main resistive layer pattern.
Inventors
- 👤 Takeshi Kakuhashi
- 👤 Hiroshi Tahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:52
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C7/00; H01C7/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
153 words
A part for a slide variable resistor, adapted for a slide terminal to be slid along the surface thereof, having a film resistive layer comprising a main resistive layer pattern formed by electroplating a thin metal resistor on an insulated support and a protective resistive layer pattern coated on said main resistive layer, wherein said protective resistive layer pattern has a larger sheet resistivity than said main resistive layer pattern, and wherein said protective resistive layer pattern is formed of an abrasion-resistant material selected from the group consisting of (1) a paste comprising (a) an electrically conductive powder selected from the group consisting of a carbon powder, silver powder, and nickel powder; and (b) a thermosetting resin, and (2) a paste comprising (a) a noble metal selected from the group consisting of gold, palladium, and silver, (b) a base metal selected from the group consisting of copper and nickel, and (c) glass frit.
Claim 2
Dependent Claim
153 words
A part for a slide variable resistor, adapted for a slide terminal to be slid along the surface thereof, having a film resistive layer comprising a main resistive layer pattern formed by electroplating a thin metal resistor on an insulated support and a protective resistive layer pattern coated on said main resistive layer, wherein said protective resistive layer pattern has a larger sheet resistivity than said main resistive layer pattern, and wherein said protective resistive layer pattern is formed of an abrasion-resistant material selected from the group consisting of (1) a paste comprising (a) an electrically conductive powder selected from the group consisting of a carbon powder, silver powder, and nickel powder; and (b) a thermosetting resin, and (2) a paste comprising (a) a noble metal selected from the group consisting of gold, palladium, and silver, (b) a base metal selected from the group consisting of copper and nickel, and (c) glass frit.
Claim 3
Dependent Claim
45 words
A part for a slide variable resistor according to claim 1, wherein said protective resistive layer pattern is formed of an abrasion-resistant material having a thickness of 10 to 30 μm and a sheet resistivity of 100 ohms per square to 300 kiloohms per square.
Claim 4
Dependent Claim
33 words
A part for a slide variable resistor according to claim 1, wherein the sheet resistivity of the protective resistive layer pattern is 5 to 300 times that of the main resistive layer pattern.
Claim 5
Dependent Claim
48 words
A part for a slide variable resistor according to claim 1, wherein said main resistive layer pattern comprises a metal thin film resistor wherein said resistor has a thickness of 0.01 to 7 μm and a sheet resistivity of 5 ohms per square to 30 kiloohms per square.
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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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |