Patent US3619113A successfully refreshed from Google Patents.
US3619113A
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US
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Flame-retardant finish for cellulosic textile materials
Assignee: Wyeth Holdings LLC
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Filing: 1969-09-26
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Granted: 1971-11-09
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Expires: 1989-09-26
Abstract
Abstract A flame-retardant finish for cellulosic textile materials, the method of applying it and the textile materials treated with the flame retardant. More particularly, the flame-retardant finish comprises an aqueous solution of tris(hydroxymethyl)phosphine (THP) or tris(alkoxymethyl)phosphine (formula I), a methylolated nitrogenous cellulose reactant and, optionally, urea. P(CH2OR)
Inventors
- 👤 Richard Frederick Stockel
- 👤 Samuel James O'brien
- 👤 Robert George Weyker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:59
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/431; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/2689
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
16 words
A finish as in claim 1 where the methylolated nitrogenous cellulose reactant is a methylolated melamine.
Claim 2
Dependent Claim
36 words
A process for imparting a flame-retardant finish, as in claim 1, to cellulosic textile materials comprising applying tris(hydroxymethyl)phosphine or tris(alkoxymethyl)phosphine of the formula P(CH2OR)3 where R is hydrogen or lower alkyl, and methylolated nitrogenous cellulose reactant.
Claim 3
Dependent Claim
11 words
A cellulosic textile material treated by the process of claim 3.
Claim 4
Dependent Claim
10 words
A finish as in claim 1 comprising in addition, formaldehyde.
Claim 5
Dependent Claim
15 words
A finish as in claim 5 wherein said ingredients are at least partially reacted together.
Claim 6
Dependent Claim
10 words
The finish of claim 1 where the phosphine is tris(hydroxymethyl)phosphine.
Claim 7
Dependent Claim
11 words
The finish of claim 1 where the nitrogenous reactant is melamine.
Claim 8
Dependent Claim
9 words
The finish of claim 1 containing in addition, urea.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |