Patent US3989702A successfully refreshed from Google Patents.
US3989702A
Expired / Lapsed
US
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Flame retardant
Assignee: Monsanto Research Corp
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Filing: 1974-07-22
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Granted: 1976-11-02
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Expires: 1994-07-22
Abstract
Abstract Mixtures comprising compounds of the formula A ¦ C ANGLE NN ¦ PARALLEL A-CC-A ANGLE N wherein A is either NH2 or N=P(NH2)3, provided at least one A is N=P(NH2)3, have been found to be good flame-retardants for material made from cotton or polyester-cotton having about 30 to 70% by weight cotton. Conveniently the material can be treated with an aqueous solution containing a sufficient amount of said mixtures and the material dried to make the material self extinguishing. Then the treated and dried material is cured at a sufficient temperature to bond said compounds to the material. Alternatively and usually preferably the drying and curing can be accomplished as a single operation.
Inventors
- 👤 Albert Y. Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:04
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/44; C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6515; C07F9/6521; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/268
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A mixture comprising compounds of the formula ##EQU2## wherein A is NH 2 or N=P(NH 2 ) 3 , provided at least one A is N=P(NH 2 ) 3 .
Claim 2
Dependent Claim
30 words
A mixture comprising compounds of the formula ##EQU2## wherein A is NH 2 or N=P(NH 2 ) 3 , provided at least one A is N=P(NH 2 ) 3 .
References Cited (Backward Citations)
US2782133A
Cited
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US3050522A
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US3296265A
Cited
US3787407A
Cited
US3887553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |