Patent US3892765A successfully refreshed from Google Patents.
US3892765A
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Dialkoxyphosphonoalkyl derivatives of cyclic ureides
Assignee: Novartis Corp
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Filing: 1973-11-27
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Granted: 1975-07-01
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Expires: 1993-11-27
Abstract
Abstract The invention relates to 3-dialkoxyphosphonoalkyl-hydantoins and 3-dialkoxyphosphonoalkyl-dihydrouracils. These compounds are manufactured by reacting the hydantoins or dihydroaracils substituted in 3-position by a halogenalkyl group with a trialkyl phosphite. They can be incorporated into polymeric materials or their starting substances and impart to them non-inflammability.
Inventors
- 👤 Daniel Porret
- 👤 Jurgen Habermeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5373; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/80; C07D233/82; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/645; C07F9/6503; C07F9/6506; C07F9/6509; C07F9/6512; C07F9/6558; C07F9/65583; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1488
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
7 words
A DIALKOXYPHOSPHONALKYL DERIVATIVE OF THE FORMULA I
Claim 2
Dependent Claim
7 words
A DIALKOXYPHOSPHONALKYL DERIVATIVE OF THE FORMULA I
Claim 3
Dependent Claim
13 words
A compound according to claim 1 in which Z denotes the propylidene-(2,2) group.
Claim 4
Dependent Claim
13 words
A compound according to claim 1 in which Z denotes the cyclohexylidene group.
Claim 5
Dependent Claim
27 words
A compound according to claim 1 in which R1 and R2 is alkyl of 1 to 4 carbon atoms or alkenyl of 3 to 4 carbon atoms.
Claim 6
Dependent Claim
17 words
A compound according to claim 4 in which R1 and R2 denote the ethyl or methyl group.
Claim 7
Dependent Claim
29 words
A compound according to claim 1 in which A denotes an alkylene group with 2 to 6 carbon atoms, especially the ethylene group, or the radical of diethyl ether.
References Cited (Backward Citations)
US3741978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |