Patent US3623940A successfully refreshed from Google Patents.
US3623940A
Expired / Lapsed
US
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Insulated wire and manufacture thereof
Assignee: AT&T Inc
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Filing: 1969-06-16
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Granted: 1971-11-30
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Expires: 1989-06-16
Abstract
Abstract Abrasion-resistant, fire-retardant conductive wire utilizes a single insulating layer of irradiation cross-linked PVC. Crosslinking is brought about by means of a difunctional monomer. Plasticizers necessary in ordinary cross-linked PVC may be eliminated in certain compositions.
Inventors
- 👤 Harold M Gladstone
- 👤 Leonard D Loan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:17
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/308; H01B3/44; H01B3/443; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
137 words
Method of producing an insulated wire member comprising the steps of extruding a coating about said wire, said coating comprising a polymeric material consisting essentially of at least 80 percent by weight of polyvinyl chloride, characterized in that said coating additionally contains from about 10 parts by weight to about 50 parts by weight of a cross-linking medium based on 100 parts by weight of said polymeric material and said cross-linking medium consists of at least about 75 percent by weight of a difunctional monomer consisting of CH2C(CH3)COO(CH2CH2O)yCOC(CH3)CH2 in which y is an average value of 4, and in that the resulting extruded article is subjected to an irradiation dose of from about 0.01 to about 15 megarads of an energy of at least 300 Kev. and in which said coating contains no additional polyvinyl chloride plasticizer.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |