US3681275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile composition improved in yellowness and brightness and production of fibers therefrom
Assignee: Japan Exlan Co Ltd
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Filing: 1970-01-16
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Granted: 1972-08-01
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Expires: 1990-01-16
Abstract
Abstract ACRYLONITRILE FIBERS IMPROVED IN YELLOWNESS AND BRIGHTNESS ARE OBTAINED BY INCLUDING THEREIN A MONOESTER OF GLYCERIN WITH A HIGHER FATTY ACID OR A DERIVATIVE OF ITS MONOESTER.
Inventors
- 👤 Kenji Takeya
- 👤 Hideto Sekiguchi
- 👤 Kunio Tanahashi
- 👤 Junji Tsuge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:41
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 0
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |