US3577499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing permanently opaque fibers
Assignee: Monsanto Co
•
Filing: 1967-09-05
•
Granted: 1971-05-04
•
Expires: 1987-09-05
Abstract
Abstract SMOOTH DELUSTERED ACRYLIC FIBERS HAVING A HIGHLY POROUS INTERNAL MICROVOID STRUCTURE WHICH IS PERMANENTLY SEALED AND NOT COLLAPSED BY DRYING HAVE BEEN PREPARED BY COAGULATION OF SOLUTION SPUN ACRYLIC POLYMERS IN A COAGULATION BATH CONTAINING VOLATILE FLUORINATED ALIPHATIC COMPOUNDS DISSOLVED THEREIN AND THEREAFTER HEATING THE FIBER.
Inventors
- 👤 John P Knudsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:48
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/247; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38; D01F6/44; D01F6/54
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |