Patent US5862316A successfully refreshed from Google Patents.
US4683166A
Expired / Lapsed
US
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Foamed plastic insulated wire and method for producing same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1986-04-01
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Granted: 1987-07-28
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Expires: 2006-04-01
Abstract
Abstract A foamed plastic insulated wire having a foamed plastic material insulation layer formed over a conductor. The plastic material includes at least one component having a swelling ratio greater than 55%, and the component comprises at least 20% by weight of the insulation layer. The insulated wire is produced by adding a blowing agent such as a chemical blowing agent and an inert gas and extruding the mixture over a conductor.
Inventors
- 👤 Masso Yuto
- 👤 Yoichi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:52
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; H01B13/00; H01B13/06; H01B13/14; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285; H01B7/2855; Y; Y02; Y02A; Y02A30/00; Y02A30/14; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249977; Y10T428/249987; Y10T428/249988; Y10T428/249989; Y10T428/24999; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A foamed plastic insulated wire comprising a foamed plastic material insulation layer formed over a conductor, said plastic material consisting essentially of a foamed low density polyethylene made from (a) a foamable low density polyethylene having a melt flow swelling ratio greater than 55%, and (b) a chemical blowing agent, an inert gas blowing agent, or a combination thereof, said foamed low density polyethylene comprising at least 20% by weight of said insulation layer, and having a cell size of 50 microns or less.
Claim 2
Dependent Claim
84 words
A foamed plastic insulated wire comprising a foamed plastic material insulation layer formed over a conductor, said plastic material consisting essentially of a foamed low density polyethylene made from (a) a foamable low density polyethylene having a melt flow swelling ratio greater than 55%, and (b) a chemical blowing agent, an inert gas blowing agent, or a combination thereof, said foamed low density polyethylene comprising at least 20% by weight of said insulation layer, and having a cell size of 50 microns or less.
Claim 3
Dependent Claim
27 words
A foamed plastic insulated wire as defined in claim 1, further comprising a solid layer formed over said insulation layer, said solid layer consisting essentially of polyolefin.
Claim 4
Dependent Claim
15 words
A foamed plastic insulated wire as defined in claim 2, wherein said polyolefin is polyethylene.
Claim 5
Dependent Claim
15 words
A foamed plastic insulated wire as defined in claim 2, wherein said polyolefin is polypropylene.
Claim 6
Dependent Claim
22 words
A foamed plastic insulated wire according to claim 1, wherein the foamed plastic material has an expansion degree of at least 60%.
Claim 7
Dependent Claim
22 words
A foamed plastic insulated wire according to claim 1, wherein the foamed plastic material has an expansion degree of at least 55%.
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) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |