US3591565A
Expired / Lapsed
US
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Polyamides containing alkali metal halide additives as void formation inhibitors
Assignee: EIDP Inc
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Filing: 1969-08-15
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Granted: 1971-07-06
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Expires: 1989-08-15
Abstract
Abstract POLYAMIDE COMPOSITIONS CONTAINING A SYNTHETIC POLYAMIDE INTIMATELY MIXED WITH 1.0 TO 10 PERCENT BY WEIGHT OF CERTAIN LITHIUM HALIDES ARE SPUN INTO LARGE DIAMETER, VOID-FREE, HIGH TENACITY MONOFILAMENTS WHICH ARE USEFUL, FOR EXAMPLE, IN ZIPPERS AND TIRE CORD.
Inventors
- 👤 John Edward Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:56
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; C; C08; C08K; C08K3/00; C08K3/16; D01F6/00; D01F6/58; D01F6/60
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |