US3565679A
Expired / Lapsed
US
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Leachproof fire-resistant complex for cellulosic substrates
Assignee: Dow Chemical Co
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Filing: 1968-06-03
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Granted: 1971-02-23
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Expires: 1988-06-03
Abstract
Abstract CELLULOSIC SUBSTRATES, E.G. WOOD, TEXTILES OR PAPER, HAVE INCREASED FIRE-RESISTANCE WHEN TREATED WITH AN AQUEOUS SOLUTION OF A COMPLEX OF A POLYALKYLENE-POLYAMINE, E.G. POLYETHYLENIMINE, AND A CONDENSATION PRODUCT OF PHOSPHORUS PENTOXIDE AND AMMONIA. APPLICATION OF THE COMPLEX IS BY CONVENTIONAL METHODS, E.G. SPRAYING, PAINTING, OR DIPPING, AND RESULTS IN LEACHPROOF PROTECTION.
Inventors
- 👤 Greene W Strother Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:11
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08L; C08L97/00; C08L97/02; D06M15/61; D06M15/673; D21; D21H; D21H21/00; D21H21/14; D21H21/34; B; B27; B27K; B27K2240/00; B27K2240/30; B27K3/00; B27K3/02; B27K3/15; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/28; C08L79/00; C08L79/02; D06M2200/00; D06M2200/30; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/56; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/4935; Y10T428/662; 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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |