Patent US5521333A successfully refreshed from Google Patents.
US5521333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-core balanced transmission cable
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1994-06-21
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Granted: 1996-05-28
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Expires: 2014-06-21
Abstract
Abstract A four-core balanced transmission cable of the present invention includes four insulated electric wires, a low dielectric center interposition member having a diameter 0.35 to 0.45 times as great as an external diameter of the insulated electric wire, a pressing winding material for compressedly winding the four insulated electric wires and the center interposition member and a covering member for covering an external circumference of the pressing winding material. Accordingly, the four-core balanced transmission cable of the present invention is thin, soft and light so as to meet the standards or requirements for a cabling system of a computer.
Inventors
- 👤 Seie Kobayashi
- 👤 Tetsuo Harada
- 👤 Seiji Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:58
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A four-core balanced transmission cable comprising: four insulated electric wires; a low dielectric center interposition member having a diameter which is from 0.35 to 0.45 times as great as an external diameter of any one of said insulated electric wires, the dielectric constant of said center interposition member being from 2.28 to 2.35; a pressing winding material compressively winding said four insulated electric wires and said center interposition member; and a covering member covering an external circumference of said pressing winding material.
Claim 2
Dependent Claim
82 words
A four-core balanced transmission cable comprising: four insulated electric wires; a low dielectric center interposition member having a diameter which is from 0.35 to 0.45 times as great as an external diameter of any one of said insulated electric wires, the dielectric constant of said center interposition member being from 2.28 to 2.35; a pressing winding material compressively winding said four insulated electric wires and said center interposition member; and a covering member covering an external circumference of said pressing winding material.
Claim 3
Dependent Claim
18 words
A four-core balanced transmission cable according to claim 1, wherein said center interposition member is made of polyolefin.
Claim 4
Dependent Claim
117 words
A four-core balanced transmission cable a four-core balanced transmission cable comprising: four insulated electric wires; a low dielectric center interposition member having a diameter which is from 0.35 to 0.45 times as great as an external diameter of any one of said insulated electric wires; a pressing winding material compressively winding said four insulated electric wires and said center interposition member; and a covering member covering an external circumference of said pressing winding material, each of said insulated electric wires including a central conductor and a coating material coating said central conductor, said coating material being made of polyolefin having a dielectric constant of from 1.3 to 1.6 and a foaming rate of from 55 to 60%.
Claim 5
Dependent Claim
117 words
A four-core balanced transmission cable a four-core balanced transmission cable comprising: four insulated electric wires; a low dielectric center interposition member having a diameter which is from 0.35 to 0.45 times as great as an external diameter of any one of said insulated electric wires; a pressing winding material compressively winding said four insulated electric wires and said center interposition member; and a covering member covering an external circumference of said pressing winding material, each of said insulated electric wires including a central conductor and a coating material coating said central conductor, said coating material being made of polyolefin having a dielectric constant of from 1.3 to 1.6 and a foaming rate of from 55 to 60%.
Claim 6
Dependent Claim
23 words
A four-core balanced transmission cable according to claim 3, wherein the dielectric constant of said center interposition member is from 2.28 to 2.35.
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) | 1999-05-28 | 1999-11-27 | 2000-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-28 | 2003-11-27 | 2004-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-28 | 2007-11-27 | 2008-05-28 | $7700.00 | Window Closed / Lapsed |