US3555805A
Expired / Lapsed
US
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Filaments of a synthetic organic polymer
Assignee: Imperial Chemical Industries Ltd
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Filing: 1966-09-14
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Granted: 1971-01-19
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Expires: 1986-09-14
Abstract
Abstract A POLYAMIDE YARN IS DESCRIBED COMPRISING AT LEAST ONE POLYAMIDE FILAMENT WHICH HAS AN AS-SPUN MOLECULAR ORIENTATION EXHIBITING AN X-RAY DEFFRACTION PATTERN OF CONCENTRIC RINGS IN WHICH THE ORIENTATION FACTOR OF THE INNER RING MINUS THE ORIENTATION FACTOR OF THE OUTER RING IS GREATER THAN 0.2. THE ORIENTATION IN THE AS-SPUN POLYAMIDE FILAMENT IS OBTAINED BY THE ADDITION OF A SMALL AMOUNT OF A POLYAMIDE NUCLEATING AGENT IN FINELY DIVIDED PARTICLE SIZE PRIOR TO SPINNING INTO A FILAMENT. THE POLYMERIC NUCLEATING AGENT IS PREFERABLY A POLYAMIDE HAVING A HIGHER MELTING POINT THAN THE MELT HOLDING TEMPERATURE OF THE FILAMENT FORMING POLYAMIDE.
Inventors
- 👤 Peter R Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:03
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; D01F1/00; D01F1/02; D01F1/10; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/2971
Claims Analysis
Total Claims: 0
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |