Patent US5263442A successfully refreshed from Google Patents.
Patent US3243391A successfully refreshed from Google Patents.
US3243391A
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Composition and process for treating cellulosic materials to make them flame-retardant
Assignee: Hooker Chemical Corp
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Filing: 1963-11-29
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Granted: 1966-03-29
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 George M Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:49
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/0002; C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C08G79/00; C08G79/02; C08G79/06; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L61/00; C08L61/20; C08L61/32; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/431; D21H17/00; D21H17/71; D21H17/72; D21H21/00; D21H21/14; D21H21/34; C08L85/00; C08L85/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
A FLAMEPROOFING COMPOSITION COMPRISING A POLYVINYL CHLORIDE LATEX, IN AN AMOUNT SUFFICIENT TO PROVIDE FROM ABOUT TWO TO ABOUT TWENTY-FIVE PERCENT BY WEIGHT OF POLYVINYL CHLORIDE IN THE COMPOSITION, A RESINOUS PRECONDENSATE FORMED BY THE REACTION OF TETRAKIS(HYDROXYMETHYL)PHOSPHONIUM CHLORIDE, UREA, AND FORMALDEHYDE IN AN AMOUNT WITHIN THE RANGE OF ABOUT TEN TO ABOUT FORTY PERCENT BY WEIGHT OF THE TOTAL COMPOSITION, THE MOLAR RATIO OF THE UREA TO TETRAKIS(HYDROXYMETHYL)PHOSPHONIUM CHLORIDE IN THE PRECONDENSATE BEING WITHIN THE RANGE OF ABOUT 14:1 TO ABOUT 3:1 AND THE MOLAR RATIO OF TOTAL FORMALDEHYDE TO UREA IN THE PRECONDENSATE BEING WITHIN THE RANGE OF ABOUT 1.5:1 TO ABOUT 2.5:1, ANTIMONY OXIDE IN AN AMOUNT WITHIN THE RANGE OF ABOUT TWO TO ABOUT FIFTEEN PERCENT BY WEIGHT OF THE TOTAL COMPOSITION, AND A LOWER ALIPHATIC ALCOHOL IN AN AMOUNT SUFFICIENT TO MAKE UP THE BALANCE OF THE COMPOSITION TO ONE HUNDRED PERCENT BY WEIGHT.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |