Patent US3780149A successfully refreshed from Google Patents.
US3780149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conjugate spinning process
Assignee: Celanese Corp
•
Filing: 1966-02-07
•
Granted: 1973-12-18
•
Expires: 1986-02-07
Abstract
Abstract CRIMPED FILAMENTS ARE PREPARED BY SUBJECTING TWO STREAMS OF THE SAME POLYMER TO DIFFERENT TEMPERATURE OR SHEAR FORCES AND EXTRUDING THE POLYMER AS SEPARATE STREAMS THROUGH THE SAME SPINNERETTE ORIFICES.
Inventors
- 👤 H Keuchel
- 👤 W Polestak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:00
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/32; B; B29; B29C; B29C48/00; B29C48/03; B29C48/12; B29C48/16; B29C48/18; B29C48/21; D01D5/22; B29C48/05; B29C48/17; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |