Patent US6364905B1 successfully refreshed from Google Patents.
US3672802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing multilayer filament
Assignee: Kanegafuchi Spinning Co Ltd
•
Filing: 1970-05-25
•
Granted: 1972-06-27
•
Expires: 1990-05-25
Abstract
Abstract A SPINNERET IS DISCLOSED FOR THE PRODUCTION OF MIXED FILAMENTS WHICH ARE MADE FROM AT LEAST TWO SPINNING MATERIALS EXTENDING SUBSTANTIALLY CONTINUOUSLY ALONG THE FILAMENT AXIS HAVING AT LEAST TEN THIN LAYERS IN ARBITRARY CROSS SECTION. THE SPINNERET CONTAINS A PLURALITY OF LAYER MULTIPLYING MIXERS FOR SEPARATION AND JOINING OF THE FILAMENT COMPONENTS IN DIFFERENT PHASE.
Inventors
- 👤 Maso Matsui
- 👤 Yutaka Utsuhara
- 👤 Masahiro Yamabe
- 👤 Susuma Tokura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:23
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D1/00; D01D1/06; D01D1/065; D01D5/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |