US3754981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for flameproofing cellulose-containing fibre material
Assignee: Novartis AG
•
Filing: 1971-06-09
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Granted: 1973-08-28
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Expires: 1991-06-09
Abstract
Abstract A process for the flame-proofing of cellulose-containing fibrous materials by applying to the substrates aqueous preparations containing a self-condensation product of an N-methylolamide of a dialkyl, dihalogenalkyl or dialkenyl phosphonopropionic acid advantageously together with a curable aminoplast precondensate.
Inventors
- 👤 H Nachbur
- 👤 Emden H Huber
- 👤 J Kern
- 👤 A Maeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:38
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; Y; Y10; Y10T; Y10T428/00; Y10T428/8305; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/268
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
Process according to claim 1, wherein the reaction product is a self-condensation product obtained in the presence of an acid catalyst.
Claim 2
Dependent Claim
15 words
Process according to claim 1, wherein the aqueous preparation contains additionally a curable aminoplast precondensate.
Claim 3
Dependent Claim
14 words
Process according to claim 1, wherein the elevated temperature is between 130* and 200*C.
Claim 4
Dependent Claim
27 words
Process according to claim 1, wherein the reaction product is a self-condensation product obtained by separating 0.9 to 1 mol of water per 1 mol of N-methylolamide.
Claim 5
Dependent Claim
19 words
Process according to claim 1, wherein the reaction product is a self-condensation product of a N-methylolamide of the formula
Claim 6
Dependent Claim
19 words
Process according to claim 1, wherein the reaction product is a self-condensation product of a N-methylolamide of the formula
Claim 7
Dependent Claim
19 words
Process according to claim 1, wherein the reaction product is a self-condensation product of the N-methylolamide of the formula
Claim 8
Dependent Claim
23 words
Process according to claim 1, wherein the reaction product is obtained by carrying out the condensation reaction at temperatures from 80* to 140*C.
References Cited (Backward Citations)
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US3577270A
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US3639539A
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US3634422A
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US3658952A
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US3679778A
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US3671611A
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US3669725A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |