US3556927A
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Compound filament of two polymers with different shrinkage capacities
Assignee: Glanzstoff AG
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Filing: 1968-05-17
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Granted: 1971-01-19
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Expires: 1988-05-17
Abstract
Abstract N BEING 2,3 OR 4 AND THE MOL PERCENT BEING TAKEN WITH REFERENCE TO THE MOLS OF ADIPIC ACID. H2N-(CH2)3-0-(CH2A-0-(CH2)3-NH2 AN IMPROVED COMPOUND FILAMENT HAVING AN ACCENTRIC CORE AND MANTLE STRUCTURE IN WHICH THE MANTLE IS A HOMOPOLYAMIDE SUCH AS POLYHEXAMETHYLENE ADIPAMIDE OR POLYCAPROLACTAM, AND THE CORE IS A COPOLYETHERAMIDE OF (A) ADIPIC ACID WITH (B) 25-80 MOL PRECNET OF HEXAMETHYLENE DIAMINE AND 75-20 MOL PRECENT OF AN ETHERDIAMINE OF THE FORMULA H2N-(CH2)3-NH2 OR
Inventors
- 👤 Erwin Sommer
- 👤 Fritz Wiloth
- 👤 Helmut Werner
- 👤 Rudolf Lotz
- 👤 Gerhard Wick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:18
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
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 |