US3801678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonopropionic acid amides
Assignee: Novartis AG
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Filing: 1972-05-02
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Granted: 1974-04-02
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Expires: 1992-05-02
Abstract
Abstract THE SUBJECT OF THE INVENTION ARE PHOSPHORUS COMPOUNDS OF THE FORMULA (-N(-CO-CH(-X)-CH2-P(=O)(-O-R1)-O-R2)-CH2-N(-CO-A)-) (-H) (-Y) WHEREIN R1 AND R2 EACH DENOTE ALKYL, ALKENYL OR HALOGENOALKYL WITH AT MOST 4 CARBON ATOMS, X DENOTES HYDROGEN OR METHYL, Y DENOTES HYDROGEN OR -CH2-O-Z, Z DENOTES HYDROGEN OR ALKYL WITH 1 TO 4 CARBON ATOMS AND A DENOTES ALKYL OR HALOENOALKYL WITH AT MOST 4 CARBON ATOMS. THESE PHOSPHOROUS COMPOUNDS ARE ABOVE ALL SUITABLE AS FLAMEPROOFING, AGENTS, PARTICULARLY FOR POLYURETHANE AND CELLULOSE CONTAINING TEXTILES.
Inventors
- 👤 H Nachbur
- 👤 A Maeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:20
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; C08J2375/00; C08J2375/04
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |