US3787360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus containing aromatic poly-mers and process for producing flame-resistant textiles
Assignee: United States Department of Agriculture
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Filing: 1972-03-28
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Granted: 1974-01-22
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Expires: 1992-03-28
Abstract
Abstract SOLUBLE METHYLOL PHOSPHINE ADDUCTS ARE PREPARED BY REACTING TRIS(HYDROXYMETHYL)PHOSPHINE WITH SUBSTITUTED OR UNSUBSTITUTED PHENOL WHICH CONTAINS ONE OR MORE HYDROGENS ORTHO OR PARA TO THE PHENOLIC HYDROXYL GROUP. THESE ADDUCTS ARE CONVENIENT AND USEFUL FOR (A) THE PREPARATION OF FLAME RESISTANT POLYMERS AND (B) THE PREPARATION OF FLAME- AND GLOW -RESISTANT ORGANIC FIBROUS MATERIALS AND FLAME-, GLOW-, WRINKLE-, AND SHRINK-RESISTANT WOVEN AND KNIT TEXTILES WHICH CONTAIN ABOUT 25% OR MORE CELLULOSIC FIBERS.
Inventors
- 👤 W Reeves
- 👤 D Daigle
- 👤 G Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:32
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41; D06M15/415; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C08; C08G; C08G79/00; C08G79/02; C08G79/04; C08G79/06; D06M13/00; D06M13/244; D06M13/282; D06M13/285; Y; Y10; Y10S; Y10S260/00; Y10S260/24
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |