US3784511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilization of fibers from acrylonitrile polymers
Assignee: Monsanto Co
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Filing: 1972-03-28
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Granted: 1974-01-08
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Expires: 1992-03-28
Abstract
Abstract COLOR STABILIZATION OF ACRYLONITRILE-CONTAINING POLYMERS MAY BE ACCOMPLISHED THROUGH TREATING ACRYLONTRILE-CONTAINING POLYMERS AND ARTICLES FORMED THEREFROM WITH AN ORGANOPHOSPHORUS COMPOUND NOT EXCEEDING 5 WEIGHT PERCENT OF SAID POLYMER, SAID COMPOUND HAVING THE GENERAL FORMULA: M-O-P(=0)(-O-M)-C(-R)(-OH)-P(=O)(-O-M)2 WHEREIN M IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, SODIUM, LITHIUM, POTASSIUM, AND R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALKYL RADICAL HAVING ONE TO ELEVEN CARBON ATOMS, A PHENYL RADICAL, AND AN ALKYL PHENYL RADICAL NO MORE THAN EIGHT CARBON ATOMS.
Inventors
- 👤 J Kirby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:49
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; 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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |