Claims
- 1. An electrically insulated conductor comprising an electrically conductive element surrounded by ultramicrocellular foamed polymer insulation having a void volume greater than about 75%, wherein the velocity of propagation of the insulated conductor is greater than 90% of the speed of light.
- 2. The electrically insulated conductor of claim 1 wherein the foamed polymer insulation has a void volume of greater than 85%.
- 3. The electrically insulated conductor of claim 2 wherein the foamed polymer insulation has a void volume of greater than 94%.
- 4. The electrically insulated conductor of claim 3 wherein the velocity of propagation of the insulated conductor is greater than 95% of the speed of light.
- 5. The electrically insulated conductor of claim 4 wherein the polymer is selected from the group consisting of polyethylene, polypropylene, poly(ethylene terephthalate) and copolymers thereof.
- 6. The electrically insulated conductor of claim 5 wherein the conductive element is a wire having a median diameter of about 0.006 inch to about 0.013 inch.
- 7. A cable comprising a plurality of electrically conductive elements each surrounded by ultramicrocellular foamed polymer insulation having a void volume greater than about 75%, wherein the velocity of propagation of the insulated conductor is greater than 90% of the speed of light.
- 8. The cable of claim 7 wherein the foamed polymer insulation has a void volume of greater than 85%.
- 9. The cable of claim 8 wherein the foamed polymer insulation has a void volume of greater than 94%.
- 10. The cable of claim 9 wherein the velocity of propagation of the insulated conductor is greater than 95% of the speed of light.
- 11. The cable of claim 10 wherein the polymer is selected from the group consisting of polyethylene, polypropylene, poly(ethylene terephthalate) and copolymers thereof.
- 12. The cable of claim 11 wherein each conductive element is a wire having a median diameter of about 0.006 inch to about 0.013 inch.
Parent Case Info
This is a continuation-in-part of application Ser. No. 07/476,333 filed Feb. 7, 1990, now abandoned.
US Referenced Citations (15)
Foreign Referenced Citations (4)
Number |
Date |
Country |
211505 |
Feb 1987 |
EPX |
35355 |
May 1973 |
JPX |
167201 |
Dec 1981 |
JPX |
2143237 |
Feb 1985 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Autorenkollektiv "Kabel und Leitungsfertigung", VEB Verlag Technik, Berlin, 1976, pp. 24-25. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
476333 |
Feb 1990 |
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