US3816068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant for cellulosic fabrics
Assignee: Burlington Industries Inc
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Filing: 1971-07-12
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Granted: 1974-06-11
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Expires: 1991-07-12
Abstract
Abstract Flame retardants for cellulosic fabrics, especially polyester blends, comprise a limited phosphine oxide class of N-methylol propionamides, particularly N-methylol-3(dimethylphosphinyl)propionamide, closely related structurally to N-methylol-3-(dimethyl phosphono)propionamide, but markedly more effective as a flame retardant.
Inventors
- 👤 J Rivlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:58
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/285; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5304; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/92; Y10S428/921; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
The process of claim 1 wherein the cellulosic textile material is a 50/50 Polyester/cellulose blended textile fabric, X is hydrogen and R is hydrogen.
Claim 2
Dependent Claim
16 words
The process of claim 1 where the cellulosic textile material is a polyester/cellulose blended textile material.
Claim 3
Dependent Claim
17 words
The process of claim 3 where R is hydrogen and X is hydrogen or a methyl radical.
Claim 4
Dependent Claim
9 words
The process of claim 3 where X is hydrogen.
Claim 5
Dependent Claim
9 words
The product produced by the product of claim 1.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |