US3219478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameproofing of cellulosic material
Assignee: Hooker Chemical Corp
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Filing: 1962-05-14
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Granted: 1965-11-23
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Expires: 1982-05-14
Abstract
No abstract record available.
Inventors
- 👤 George M Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:01
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/431; D06M15/21; D06M15/244; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2656
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR PREPARING A FLAME-RETARDANT CELLALOSIC MATERIAL WHICH COMPRISES IMPREGNATING THE CELLULOSIC MATERIAL TO BE TREATED WITH AN AQUEOUS DISPERSION OF A HYDROXYMETHYLPHOSPHONIUM CHLORIDE COMPOUND, A WATER-SOLUBLE CYCLIC NTIROGEN-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF TRIAZINE AND DIMETHYLOL CYCLIC ALKYLENE UREAS, A WATER-SOLUBLE TERTIARY LOWER ALKYL AMINE, A COMPOUND SELECTGED FROM THE GROUP CONSISTING OF THIOUREA AND UREA, A POLYVINYL CHLORIDE RESIN HAVING A SOFTENING POINT BETWEEN ABOUT 170 AND ABOUT 200*C., AND ANTIMONY OXIDE, AND DRYING AND CURING THE CELLULOSIC MATERIAL.
Claim 2
Dependent Claim
84 words
A PROCESS FOR PREPARING A FLAME-RETARDANT CELLALOSIC MATERIAL WHICH COMPRISES IMPREGNATING THE CELLULOSIC MATERIAL TO BE TREATED WITH AN AQUEOUS DISPERSION OF A HYDROXYMETHYLPHOSPHONIUM CHLORIDE COMPOUND, A WATER-SOLUBLE CYCLIC NTIROGEN-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF TRIAZINE AND DIMETHYLOL CYCLIC ALKYLENE UREAS, A WATER-SOLUBLE TERTIARY LOWER ALKYL AMINE, A COMPOUND SELECTGED FROM THE GROUP CONSISTING OF THIOUREA AND UREA, A POLYVINYL CHLORIDE RESIN HAVING A SOFTENING POINT BETWEEN ABOUT 170 AND ABOUT 200*C., AND ANTIMONY OXIDE, AND DRYING AND CURING THE CELLULOSIC MATERIAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |