Patent US4625194A successfully refreshed from Google Patents.
Patent US3824222A successfully refreshed from Google Patents.
US3824222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameproof modacrylic fibers
Assignee: Asahi Kasei Corp
•
Filing: 1971-11-05
•
Granted: 1974-07-16
•
Expires: 1991-11-05
Abstract
Abstract MODACRYLIC FIBERS HAVING EXCELLENT FLAMEPROOF PROPERTY AND RETAINING THE SUPERIOR WHITENESS, HEAT-STABILITY ETC. OFF ACRYLONITRILE POLYMER FIBERS ARE PRODUCED FROM THE POLYFMERS CONTAINING AS PRINCIPAL COMPONENTS, 50% BY WEIGHT OR MORE OF ACRYLONITRILE 25% BY WEIGHT OR MORE OF VINYLIDENE CHLORIDE AND 0.1-3-% BY WEIGHT OF BIS(2-CHLOROETHYL)VVINYLPHONATE AND IF NECESSARY, AS ADDITIONAL COMPONENT, AT LEAST ONE COPOLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND.
Inventors
- 👤 Y Shichijo
- 👤 H Sato
- 👤 T Iwasa
- 👤 Y Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:22
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/40; C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; D01F1/00; D01F1/02; D01F1/07; Y; Y10; Y10S; Y10S260/00; Y10S260/24
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |