US3558420A
Expired / Lapsed
US
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Hollow filaments
Assignee: Honeywell International Inc
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Filing: 1967-08-17
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Granted: 1971-01-26
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Expires: 1987-08-17
Abstract
Abstract A HOLLOW FILAMENT OF SYNTHETIC POLYMER MATERIAL IS DISCLOSED CONSISTING OF A SHEATH SURROUNDING A LINGITUDINALLY EXTENDED CAVITY. THE SHEATH COMPRISES A CONTINUOUS PHASE POLYAMIDE POLYMER CONTAINING DISPERSED THEREIN A POLYESTER IN THE FORM OF MICROFIBERS LYING PREDOMINANTLY IN THE DIRECTION OF THE AXIS OF THE FILAMENT.
Inventors
- 👤 James E Opfell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:38
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/345; D01D5/253; D01D5/28; B29C48/03; B29C48/05; B29C48/09; B29C48/11; B29C48/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975; Y10T428/31504; Y10T428/31725; Y10T428/31736
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |