US4716073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin wall high performance insulation on wire
Assignee: EIDP Inc
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Filing: 1986-06-02
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Granted: 1987-12-29
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Expires: 2006-06-02
Abstract
Abstract This invention relates to the use of ethylene/tetrafluoroethylene (ETFE) or ethylene/chlorotrifluoroethylene (ECTFE) polymers to produce a foamed coating of insulation over wire and used as wire pairs for transmitting electronic signals, in which the foamed coating is surrounded by a protective jacket or skin made of one of the two polymers.
Inventors
- 👤 Stuart K. Randa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:21
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/02; H01B7/0233; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/443; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249988; Y10T428/249989; Y10T428/24999; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2935; Y10T428/294; Y10T428/2942; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
An electrical wire covered with an extruded fluoropolymer foam layer comprising ethylene/chlorotrifluoroethylene copolymer or ethylene/tetrafluoroethylene copolymer and an extruded fluoropolymer unfoamed skin layer around the foam comprising ethylene/chlorotrifluoroethylene copolymer or ethylene/tetrafluoroethylene copolymer; wherein the foam layer is between 0.05-0.76 mm thick and the skin layer is between 0.013-0.076 mm thick and wherein the foam layer and the skin layer are each formed by separate extrusions, which extrusions can be either simultaneous or in sequence.
Claim 2
Dependent Claim
74 words
An electrical wire covered with an extruded fluoropolymer foam layer comprising ethylene/chlorotrifluoroethylene copolymer or ethylene/tetrafluoroethylene copolymer and an extruded fluoropolymer unfoamed skin layer around the foam comprising ethylene/chlorotrifluoroethylene copolymer or ethylene/tetrafluoroethylene copolymer; wherein the foam layer is between 0.05-0.76 mm thick and the skin layer is between 0.013-0.076 mm thick and wherein the foam layer and the skin layer are each formed by separate extrusions, which extrusions can be either simultaneous or in sequence.
Claim 3
Dependent Claim
22 words
The wire of claim 1 wherein the wire is solid or stranded copper wire of 40 to 20 overall AWG gauge size.
Claim 4
Dependent Claim
10 words
Pairs of the wires defined in claims 1 or 2.
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) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |