US3579379A
Expired / Lapsed
US
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Process for producing conductors insulated with polyethylene terephthalate
Assignee: FRANCISCUS C A A VAN BERKEL
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Filing: 1966-12-01
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Granted: 1971-05-18
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Expires: 1986-12-01
Abstract
Abstract PROCESS FOR PRODUCING INSULATED ELECTRICAL CONDUCTORS COMPRISING APPLYING A COATING OF POLYMERIC ETHYLENE TEREPHTHALATE TO ELECTRICAL CONDUCTORS, THE IMPROVEMENT COMPRISING (1) UTILIZING MOLTEN POLYETHYLENE TEREPHTHALATE HAVING AN INITIAL RELATIVE VISCOSITY OF AT LEAST 1.80 AND CONTAINING FROM 0.01 TO 5% BY WEIGHT OF A LIQUID CRYSTALLIZATION PROMOTING COMPOUND, (2) FOLLOWED BY COOLING THE COATING AND THEN (3) HEATING THE COOLED COATING TO A TEMPERATURE OF AT LEAST 100*C. TO EFFECT A CRYSTALLIZATION OF AT LEAST 15% IN SAID POLYMERIC COATING. IN THE PRACTICE OF THIS PROCESS, LENGTHY INJECTION MOLDING CYCLES AND/OR UNDULY LONG COOLING CYCLES ARE AVOIDED.
Inventors
- 👤 Franciscus C A A Van Berkel
- 👤 Stanley F Luques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:24
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/08; B; B29; B29C; B29C48/00; B29C48/15; H; H01; H01B; H01B13/00; H01B13/06; H01B13/10; H01B13/103; H01B13/14; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/421; H01B3/422; H01B3/423; B29C48/03; B29C48/05; C08J2367/00; C08J2367/02; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927
Claims Analysis
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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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |