Patent US1778015A successfully refreshed from Google Patents.
Patent US3775725A successfully refreshed from Google Patents.
US3775725A
Expired / Lapsed
US
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Printed resistor
Assignee: Hokuriku Electric Industry Co Ltd
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Filing: 1972-01-24
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Granted: 1973-11-27
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Expires: 1992-01-24
Abstract
Abstract A printed resistor comprising an insulating matrix board, copper layers printed on one side of said board by etching and having predetermined patterns, impedance layers screen-printed on the other side of said board, and conductors applied in holes formed in said board and extending through said holes for electrically connecting between selected ones of said copper layers and said impedance layers.
Inventors
- 👤 I Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:17
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/16; H05K1/167; H01; H01C; H01C1/00; H01C1/14; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H05K2201/00; H05K2201/03; H05K2201/032; H05K2201/0323; H05K2201/0332; H05K2201/0335; H05K2201/035; H05K2201/09; H05K2201/09209; H05K2201/09372; H05K2201/09436; H05K2201/09818; H05K2201/09881; H05K2203/00; H05K2203/14; H05K2203/1453; H05K3/00; H05K3/02; H05K3/06; H05K3/22; H05K3/28; H05K3/38; H05K3/386; H05K3/40; H05K3/42; H05K3/425; H05K3/427; H05K3/46; H05K3/4644; H05K3/4664
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
103 words
An electrical resistor employing an insulating board comprising, in combnation, conductor layers on one side of the board, a plurality of through holes in the board in a plurality of conductor layers, impedance material on a second side of the board so as to form a layer of impedance material between two of said through holes, electrically conductive means in said two through holes interconnecting each end portion of said layer of impedance material with a conductor layer, and a conductive coating across one exposed end of each of said electrically conductive means and the mating end of each of said conductor layers.
Claim 2
Dependent Claim
103 words
An electrical resistor employing an insulating board comprising, in combnation, conductor layers on one side of the board, a plurality of through holes in the board in a plurality of conductor layers, impedance material on a second side of the board so as to form a layer of impedance material between two of said through holes, electrically conductive means in said two through holes interconnecting each end portion of said layer of impedance material with a conductor layer, and a conductive coating across one exposed end of each of said electrically conductive means and the mating end of each of said conductor layers.
Claim 3
Dependent Claim
103 words
An electrical resistor employing an insulating board comprising, in combination, conductor layers on one side of the board, a plurality of through holes in the board in a plurality of conductor layers, impedance material on a second side of the board so as to form a layer of impedance material between two of said through holes, electrically conductive means in said two through holes interconnecting each end portion of said layer of impedance material with a conductor layer, and a conductive coating across one exposed end of each of said electrically conductive means and the adjacent end of said layer of impedance material.
Claim 4
Dependent Claim
103 words
An electrical resistor employing an insulating board comprising, in combination, conductor layers on one side of the board, a plurality of through holes in the board in a plurality of conductor layers, impedance material on a second side of the board so as to form a layer of impedance material between two of said through holes, electrically conductive means in said two through holes interconnecting each end portion of said layer of impedance material with a conductor layer, and a conductive coating across one exposed end of each of said electrically conductive means and the adjacent end of said layer of impedance material.
Claim 5
Dependent Claim
114 words
An electrical resistor employing an insulating board, comprising, in combination, conductor layers on one side of the board, a plurality of through holes in the board in a plurality of conductor layers, impedance material on a second side of the board so as to form a layer of impedance material between two of said through holes, electrically conductive means in said two through holes interconnecting each end portion of said layer of impedance material with a conductor layer, a conductive coating across one exposed end of said electrically conductive means and the adjacent end of said layer of impedance maTerial, and an insulating coating over said layer of impedance material and electrically conductive means.
Claim 6
Dependent Claim
114 words
An electrical resistor employing an insulating board, comprising, in combination, conductor layers on one side of the board, a plurality of through holes in the board in a plurality of conductor layers, impedance material on a second side of the board so as to form a layer of impedance material between two of said through holes, electrically conductive means in said two through holes interconnecting each end portion of said layer of impedance material with a conductor layer, a conductive coating across one exposed end of said electrically conductive means and the adjacent end of said layer of impedance maTerial, and an insulating coating over said layer of impedance material and electrically conductive means.
Claim 7
Dependent Claim
112 words
An electrical resistor employing an insulating board, comprising in combination, conductor layers on one side of the board, a plurality of through holes in the board in a plurality of conductor layers, impedance material on a second side of the board so as to form a layer of impedance material between two of said through holes, electrically conductive means in said two through holes interconnecting each end portion of said layer of impedance material with a conductor layer, a conductive coating across one exposed end of said electrically conductive means and the mating end of each of said conductor layers, and an insulating coating over said conductor layers and electrically conductive means.
Claim 8
Dependent Claim
112 words
An electrical resistor employing an insulating board, comprising in combination, conductor layers on one side of the board, a plurality of through holes in the board in a plurality of conductor layers, impedance material on a second side of the board so as to form a layer of impedance material between two of said through holes, electrically conductive means in said two through holes interconnecting each end portion of said layer of impedance material with a conductor layer, a conductive coating across one exposed end of said electrically conductive means and the mating end of each of said conductor layers, and an insulating coating over said conductor layers and electrically conductive means.
Claim 9
Dependent Claim
86 words
A printed resistor employing a printed circuit board which comprises an insulating board; copper layers applied on a first side of said board by etching and having predetermined patterns, impedance layers printed on a second side of said board at predetermined areas thereon, conductors applied in through holes in said board for electrically connecting between selected ones of said copper layers and said impedance layers, and printed conductive coatings applied across the opposite ends of said impedance layers and the adjacent ends of said connecting conductors.
Claim 10
Dependent Claim
86 words
A printed resistor employing a printed circuit board which comprises an insulating board; copper layers applied on a first side of said board by etching and having predetermined patterns, impedance layers printed on a second side of said board at predetermined areas thereon, conductors applied in through holes in said board for electrically connecting between selected ones of said copper layers and said impedance layers, and printed conductive coatings applied across the opposite ends of said impedance layers and the adjacent ends of said connecting conductors.
Claim 11
Dependent Claim
88 words
A printed resistor employing a printed circuit board which comprises an insulating board; copper layers applied on a first side of said board by etching and having predetermined patterns, impedance layers printed on a second side of said board at predetermined areas thereon, conductors applied in through holes in said board for electrically connecting between selected ones of said copper layers and said impedance layers, and printed conductive coatings applied across the ends of selected ones of said copper layers and the adjacent ends of said connecting conductors.
Claim 12
Dependent Claim
88 words
A printed resistor employing a printed circuit board which comprises an insulating board; copper layers applied on a first side of said board by etching and having predetermined patterns, impedance layers printed on a second side of said board at predetermined areas thereon, conductors applied in through holes in said board for electrically connecting between selected ones of said copper layers and said impedance layers, and printed conductive coatings applied across the ends of selected ones of said copper layers and the adjacent ends of said connecting conductors.
Claim 13
Dependent Claim
85 words
A printed resistor employing a printed circuit board which comprises an insulating board; copper layers applied on a first side of said board by etching and having predetermined patterns, impedance layers printed on a second side of said board at predetermined areas thereon, conductors applied in through holes in said board for electrically connecting between selected ones of said copper layers and said impedance layers, and a printed insulating resin coating applied over the ends of selected ones of said copper layers and conductive coatings.
Claim 14
Dependent Claim
85 words
A printed resistor employing a printed circuit board which comprises an insulating board; copper layers applied on a first side of said board by etching and having predetermined patterns, impedance layers printed on a second side of said board at predetermined areas thereon, conductors applied in through holes in said board for electrically connecting between selected ones of said copper layers and said impedance layers, and a printed insulating resin coating applied over the ends of selected ones of said copper layers and conductive coatings.
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |