US3639232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-retardant finish for nylon
Assignee: Wyeth Holdings LLC
•
Filing: 1968-04-24
•
Granted: 1972-02-01
•
Expires: 1988-04-24
Abstract
Abstract A composition for imparting fire retardancy to nylon textiles, comprising highly methylolated urea, thiourea and ammonium chloride; the method of imparting fire retardancy to nylon textiles; and a nylon textile having fire-retardant properties.
Inventors
- 👤 Claus Wyman Busch Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:31
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31761; Y10T428/31942; Y10T428/31946; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2721
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
The composition of claim 1 wherein the amount of methylolated urea is from about 3 to 10 percent; said thiourea is from about 1 to 8 percent; and said ammonium chloride is from about 0.10 to 0.35 percent.
Claim 2
Dependent Claim
57 words
A nylon textile material having a fire retardant finish thereon, comprising a deposit by weight of from about 1 to 15 percent of methylolated urea, having at least 3.5 mols of combined formaldehyde per mol of urea; from about 0.5 to 15 percent of thiourea; and from about 0.035 to 0.55 percent by weight of ammonium chloride.
References Cited (Backward Citations)
US2415112A
Cited
US2466457A
Cited
US2795513A
Cited
US2922726A
Cited
US3335113A
Cited
US3317345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |