Patent US3993967A successfully refreshed from Google Patents.
US3993967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance-capacitance network
Assignee: AT&T Inc
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Filing: 1975-03-31
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Granted: 1976-11-23
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Expires: 1995-03-31
Abstract
Abstract A windable resistance-capacitance (R-C) network having at least three terminals and formed of adjacent first and second alternating layers of dielectric and electrically conductive low-resistance material is disclosed, in which discrete resistance and capacitance network elements of predetermined value are interconnected and formed by removing portions of the layers of conductive material along appropriately positioned lines. The present network can be economically mass produced and the formed resistance and capacitance elements exhibit a minimal distributive effect.
Inventors
- 👤 Mansoor Ali Saifi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:30
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/40; H03; H03H; H03H7/00; H03H7/01; H03H7/06; H03H7/075
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
213 words
A network including discrete resistance and capacitance elements connected in a series-parallel relationship, the network comprising: first and second layers of dielectric material and first and second layers of low-resistance electrically conductive material, said layers of dielectric material and layers of conductive material being arranged face-to-face adjacent to each other in alternating sequence, said first and second layers of conductive material defining a first and a second conductive path, respectively, one of said conductive paths comprising discrete alternate sections of the associated layer of conductive material and a discrete resistive element pattern formed in said associated layer of conductive material, each section being capacitively coupled to an adjacent corresponding discrete section of the other layer of conductive material to form a discrete capacitor element; first means electrically connected to the first section of said first layer of conductive material, said first section forming one plate of a first capacitor element; second means electrically connected to a section of one of said first and second layers of conductive material, which section forms one plate of another capacitor element, to complete the series path of said series-parallel relationship; and third means electrically connected to said second layer of conductive material to connect to the elements on said second layer to complete said series-parallel resistance-capacitance network.
Claim 2
Dependent Claim
213 words
A network including discrete resistance and capacitance elements connected in a series-parallel relationship, the network comprising: first and second layers of dielectric material and first and second layers of low-resistance electrically conductive material, said layers of dielectric material and layers of conductive material being arranged face-to-face adjacent to each other in alternating sequence, said first and second layers of conductive material defining a first and a second conductive path, respectively, one of said conductive paths comprising discrete alternate sections of the associated layer of conductive material and a discrete resistive element pattern formed in said associated layer of conductive material, each section being capacitively coupled to an adjacent corresponding discrete section of the other layer of conductive material to form a discrete capacitor element; first means electrically connected to the first section of said first layer of conductive material, said first section forming one plate of a first capacitor element; second means electrically connected to a section of one of said first and second layers of conductive material, which section forms one plate of another capacitor element, to complete the series path of said series-parallel relationship; and third means electrically connected to said second layer of conductive material to connect to the elements on said second layer to complete said series-parallel resistance-capacitance network.
Claim 3
Dependent Claim
30 words
A resistance-capacitance network according to claim 1, wherein the adjacent first and second alternate layers of dielectric and low-resistance electrically conductive material are convoluted to form a wound resistance-capacitance network.
Claim 4
Dependent Claim
78 words
A resistance-capacitance network according to claim 1, wherein: said one conductive path comprises first and second sections and is said second conductive path formed in said second layer of conductive material, the resistive pattern comprising part of said one conductive path being connected at one end to a common electrical connection between said first and second sections; and said third means is terminated on the other end of the resistive path on said second layer of conductive material.
Claim 5
Dependent Claim
31 words
A resistance-capacitance network according to claim 3, wherein: said second means is terminated on the second section forming part of the first conductive path on said first layer of conductive material.
Claim 6
Dependent Claim
52 words
A resistance-capacitance network according to claim 3, wherein: portions of said first layer of conductive material are removed along closely spaced parallel lines which overlie said resistive pattern on said second layer of conductive material, thereby to electrically isolate from each other the first and second sections of said first conductive path.
Claim 7
Dependent Claim
114 words
A resistance-capacitance network according to claim 3, wherein: said first conductive path further comprises a third section of said first layer of conductive material and a second resistive pattern positioned between said second and third sections, the second resistive pattern being connected at one end to a common electrical connection between said second and third sections and at the other end to said third means, and said third section being capacitively coupled to a corresponding third section formed in said second layer of conductive material to form a third capacitor; and the second means is terminated on the third section forming part of the second conductive path on said second layer of conductive material.
Claim 8
Dependent Claim
85 words
A resistance-capacitance network according to claim 6, wherein: portions of said first layer of conductive material are removed along closely spaced parallel lines which overlie the first resistive pattern, thereby to electrically isolate from each other the first and second sections of said first conductive path; and portions of said second layer of conductive material are removed along closely spaced parallel lines which underlie the second resistive pattern, thereby to electrically isolate from each other the second and third sections of said second conductive path.
Claim 9
Dependent Claim
63 words
A resistance-capacitance network according to claim 1, wherein: said one conductive path is said first conductive path formed in said first layer of conductive material, the first conductive path having said first section, resistive pattern, and second section connected in series; and the third means is connected to a common electrical connection between said first and second sections of said second conductive path.
Claim 10
Dependent Claim
24 words
A resistance-capacitance network according to claim 8, wherein: the second means is terminated on the second section of said first layer of conductive material.
Claim 11
Dependent Claim
46 words
A resistance-capacitance network according to claim 8, wherein: portions of said first layer of conductive material are removed along closely spaced parallel lines running lengthwise in said first layer of conductive material, to form said resistive pattern at least one resistive path having a serpentine configuration.
Claim 12
Dependent Claim
42 words
A resistance-capacitance network according to claim 10, wherein: the resistive pattern comprises first and second resistive paths forming first and second resistors, respectively, said resistive paths being connected in parallel with one another to provide a combined resistance value equal to R.
Claim 13
Dependent Claim
44 words
A resistance-capacitance network according to claim 8, wherein: portions of the first layer of conductive material are removed along closely spaced parallel lines running crosswise in said first layer of conductive material to form the resistive pattern constituting a path having a serpentine configuration.
Claim 14
Dependent Claim
51 words
A resistance-capacitance network according to claim 12, wherein: portions of the second layer of conductive material are removed along closely spaced parallel lines which partially underlie the resistive pattern on said first layer of conductive material to substantially reduce the distributed capacitance between the first and second layers of conductive materials.
Claim 15
Dependent Claim
121 words
A resistance-capacitance network according to claim 9, wherein: the first conductive path further comprises a third section of said first layer of conductive material and a second resistive pattern positioned both between the first resistive pattern and the second section, said third section being capacitively coupled to a corresponding third section on said second layer of conductive material to form a third capacitor and said first conductive path comprises said first section, the first resistive path, the third section, the second resistive path, and the second section connected in series between said first and second means; and the third means is connected to a common electrical connection between said first, second, and third sections on the second layer of conductive material.
Claim 16
Dependent Claim
197 words
In a resistance-capacitance network; first and second interleaved and convoluted strips of insulating materials; a first layer of electrically conductive material on a first surface of said first insulating strip, portions of the first layer of conductive material being removed along closely spaced parallel lines extending for nearly the entire length of said first layer of conductive material from one end thereof and positioned near the center of said first layer; a second layer of electrically conductive material on a first surface of said second insulating strip, portions of the first layer of conductive material being removed along closely spaced parallel lines which extend for the entire length of said second layer of conductive material to overlie the parallel lines formed in said first layer of conductive material and separate said second layer of conductive material into first and second sections; first means for electrically contacting only the first section on said second layer of conductive material; second means for electrically contacting only the second section on said second layer of conductive material; and third means for electrically contacting only said first layer of conductive material near the end thereof and between said closely spaced parallel lines.
Claim 17
Dependent Claim
197 words
In a resistance-capacitance network; first and second interleaved and convoluted strips of insulating materials; a first layer of electrically conductive material on a first surface of said first insulating strip, portions of the first layer of conductive material being removed along closely spaced parallel lines extending for nearly the entire length of said first layer of conductive material from one end thereof and positioned near the center of said first layer; a second layer of electrically conductive material on a first surface of said second insulating strip, portions of the first layer of conductive material being removed along closely spaced parallel lines which extend for the entire length of said second layer of conductive material to overlie the parallel lines formed in said first layer of conductive material and separate said second layer of conductive material into first and second sections; first means for electrically contacting only the first section on said second layer of conductive material; second means for electrically contacting only the second section on said second layer of conductive material; and third means for electrically contacting only said first layer of conductive material near the end thereof and between said closely spaced parallel lines.
Claim 18
Dependent Claim
149 words
In a resistance-capacitance network: first and second interleaved and convoluted strips of insulating material; a first layer of electrically conductive material on a first surface of said first strip of insulating material, portions of said first layer of conductive material being removed along at least three closely spaced parallel lines to both form a resistive path having a serpentine configuration and divide said first layer of conductive material into a first and a second section, each section being connected to a separate end of said resistive path; a second layer of electrically conductive material on a first surface of said second strip of insulating material; first means for electrically contacting only the first section of said first layer of conductive material; second means for electrically contacting only the second section of said first layer of conductive material; and third means for electrically contacting the second layer of conductive material.
Claim 19
Dependent Claim
149 words
In a resistance-capacitance network: first and second interleaved and convoluted strips of insulating material; a first layer of electrically conductive material on a first surface of said first strip of insulating material, portions of said first layer of conductive material being removed along at least three closely spaced parallel lines to both form a resistive path having a serpentine configuration and divide said first layer of conductive material into a first and a second section, each section being connected to a separate end of said resistive path; a second layer of electrically conductive material on a first surface of said second strip of insulating material; first means for electrically contacting only the first section of said first layer of conductive material; second means for electrically contacting only the second section of said first layer of conductive material; and third means for electrically contacting the second layer of conductive material.
Claim 20
Dependent Claim
182 words
In a resistance-capacitance network: first and second interleaved and convoluted strips of insulating material; a first layer of electrically conductive material on a first surface of the first strip of insulating material, portions of said first layer of conductive material being removed along a plurality of sets of at least three parallel lines to form a similar plurality of resistive paths having a serpentine configuration which divide said first layer of conductive material into a similar plurality plus one of alternate sections thereof, the first layer of conductive material forming a conductive path comprising alternate sections of said first layer of conductive material and said resistive paths connected in series; a second layer of electrically conductive material on a first surface of said second strip of insulating material; first means for electrically contacting only the first section of said first layer of conductive material in said serial conductive path; second means for electrically contacting only the last section of said first layer of conductive material in said serial conductive path; and third means for electrically contacting said second layer of conductive material.
Claim 21
Dependent Claim
182 words
In a resistance-capacitance network: first and second interleaved and convoluted strips of insulating material; a first layer of electrically conductive material on a first surface of the first strip of insulating material, portions of said first layer of conductive material being removed along a plurality of sets of at least three parallel lines to form a similar plurality of resistive paths having a serpentine configuration which divide said first layer of conductive material into a similar plurality plus one of alternate sections thereof, the first layer of conductive material forming a conductive path comprising alternate sections of said first layer of conductive material and said resistive paths connected in series; a second layer of electrically conductive material on a first surface of said second strip of insulating material; first means for electrically contacting only the first section of said first layer of conductive material in said serial conductive path; second means for electrically contacting only the last section of said first layer of conductive material in said serial conductive path; and third means for electrically contacting said second layer of conductive material.
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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) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |