Patent US4895756A successfully refreshed from Google Patents.
US4895756A
Expired / Lapsed
US
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Printed circuit substrate
Assignee: Junkosha Co Ltd
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Filing: 1988-09-23
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Granted: 1990-01-23
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Expires: 2008-09-23
Abstract
Abstract A printed circuit is provided wherein the electrically conductive material which forms the circuit elements is embedded within a dielectric substrate. The preferred dielectric substrate is porous, expanded polytetrafluoroethylene.
Inventors
- 👤 Hirosuke Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:36
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/02; H; H01; H01C; H01C7/00; H01C7/22; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/16; H05K1/162; H05K1/167; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0116; H05K2201/0137; H05K2201/015; H05K2201/0183; H05K2201/0187; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; H05K2201/03; H05K2201/032; H05K2201/0323; H05K2201/0332; H05K2201/0364; H05K2201/0376; H05K2201/08; H05K2201/083; H05K2201/086; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/09563; H05K2203/00; H05K2203/14; H05K2203/1461; H05K3/00; H05K3/40; H05K3/4038; H05K3/4053; H05K3/4069; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249986; Y10T428/249987; Y10T428/24999; Y10T428/25; Y10T428/30; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
20 words
A printed circuit comprising electrically conductive material which forms circuit elements contained within the pores of a porous dielectric substrate.
Claim 2
Dependent Claim
20 words
A printed circuit comprising electrically conductive material which forms circuit elements contained within the pores of a porous dielectric substrate.
Claim 3
Dependent Claim
17 words
The circuit of claim 1 wherein said conductive material is a low-conductivity material which forms a resistor.
Claim 4
Dependent Claim
18 words
The circuit of claim 1 wherein said conductive material is a high-dielectric constant material which forms a capacitor.
Claim 5
Dependent Claim
16 words
The circuit of claim 1 wherein said conductive material is a material having high magnetic permeability.
Claim 6
Dependent Claim
15 words
The printed circuit of claim 1 wherein said dielectric substrate is a porous dielectric material.
Claim 7
Dependent Claim
19 words
The printed circuit of claim 5 wherein said dielectric substrate is a porous dielectric material having continuous pores therethrough.
Claim 8
Dependent Claim
14 words
The printed circuit of claim 5 wherein said dielectric substrate is porous, expanded polytetrafluoroethylene.
Claim 9
Dependent Claim
13 words
The printed circuit of claim 1 wherein said conductive material is electrically conductive.
Claim 10
Dependent Claim
13 words
The printed circuit of claim 1 wherein said conductive material is light conducting.
Claim 11
Dependent Claim
15 words
The circuit of claim 1 wherein said conductive material is impregnated within said dielectric substrate.
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) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |