US4730088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission line
Assignee: Junkosha Co Ltd
•
Filing: 1986-10-27
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Granted: 1988-03-08
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Expires: 2006-10-27
Abstract
Abstract A high speed electrical transmission line is provided comprising a signal conductor having an open cell, continuously porous, polymeric insulating material surrounding the conductor, the insulating material having a plurality of openings fused therein, the walls of the openings being solid, fused polymer which provide compressive strength for the otherwise highly compressible porous insulating material. The preferred polymer is expanded, porous polytetrafluoroethylene. The openings may be formed by a laser or by other means.
Inventors
- 👤 Hirosuke Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/02; H01B7/0233; H01B11/00; H01B11/18; H01B11/1834; H01B11/1839; H01B7/08; H01B7/0838
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
54 words
An electrical transmission line comprising a signal conductor, a porous polymeric insulating material surrounding said conductor, said insulating material having at least one opening therein having a wall, the polymeric material at and near said wall being solid, fused polymeric material, whereby said opening provides compressive strength for the otherwise highly compressible, porous material.
Claim 2
Dependent Claim
54 words
An electrical transmission line comprising a signal conductor, a porous polymeric insulating material surrounding said conductor, said insulating material having at least one opening therein having a wall, the polymeric material at and near said wall being solid, fused polymeric material, whereby said opening provides compressive strength for the otherwise highly compressible, porous material.
Claim 3
Dependent Claim
12 words
The transmission line of claim 1 having a plurality of said openings.
Claim 4
Dependent Claim
17 words
The transmission line of claim 1 wherein said opening is a groove oriented helically about said conductor.
Claim 5
Dependent Claim
16 words
The transmission line of claim 2 wherein said openings are oriented radially outwardly from said conductor.
Claim 6
Dependent Claim
15 words
The transmission line of claim 1 wherein said insulating material is porous, expanded, unsintered polytetrafluoroethylene.
Claim 7
Dependent Claim
16 words
The transmission line of claim 1 wherein said insulating material is porous, expanded, amorphously locked polytetrafluoroethylene.
Claim 8
Dependent Claim
13 words
The transmission line of claim 1 in the form of a round cable.
Claim 9
Dependent Claim
19 words
The transmission line of claim 7 having an outer conductor around said insulating material to form a coaxial cable.
Claim 10
Dependent Claim
26 words
The transmission line of claim 2 having a plurality of conductors oriented substantially in parallel between sheets of said insulating material to form a flat cable.
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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |