US3745191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistant organic textiles through treatment with halogen containing soluble methylol phosphine adducts
Assignee: United States Department of Agriculture
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Filing: 1971-05-07
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Granted: 1973-07-10
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Expires: 1991-05-07
Abstract
Abstract SOLUBLE METHYLOL PHOSPHINE ADDUCTS WHICH CONTAIN HALOGEN ATOMS ATTACHED TO AROMATIC CARBON ATOMS ARE PREPARED BY REACTING TRIS(HYDROXYMETHYL)PHOSPHINE WITH HALOGEN SUBSTITUTED PHENOLS WHICH CONTAIN ONE OR MORE HYDROGENS ORTHO OR PARA TO THE PHENOLIC HYDROXYL GROUP. THESE ADDUCTS ARE CONVENIENT AND USEFUL FOR (A) THE PREPARATION OF FLAMES-RESISTANT POLYMERS AND (B) THE PREPARATION OF FLAME-RESISTANT ORGANIC FIBROUS MATERIALS AND FLAME-, GLOW-, WRINKLE-, AND SHRINK-RESISTANT WOVEN AND KNIT TEXTILES WHICH CONTAIN ABOUT 25% OR MORE CELLULOSIC FIBERS.
Inventors
- 👤 G Drake
- 👤 D Daigle
- 👤 W Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:21
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C08G79/025; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/285; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/268
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |