US4046777A
Expired / Lapsed
US
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Fluorine substituted maleimides
Assignee: Novartis Corp
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Filing: 1975-09-03
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Granted: 1977-09-06
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Expires: 1995-09-03
Abstract
Abstract Fluorine-containing maleic and derivative of the formula <IMAGE> WHEREIN A DENOTES 1 OR 2 AND R denotes either the radical -NHxCO-D-COxOH or the radical <IMAGE> wherein D represents a divalent radical containing a carbon-carbon double bond, and in which b denotes a number from 3 to 5 if a = 1, or b denotes 3 or 4 if a = 2, and if a = 2 the two radicals R are preferably in the p- or in the m-position to one another, are prepared.
Inventors
- 👤 Albrecht Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:08
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/44; C07D207/444; C07D207/448; C07D207/452; C08; C08F; C08F22/00; C08F22/36; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/123
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A fluorine-containing imide of the formula ##STR21## in which a denotes 1 or 2 and R denotes the radical ##STR22## wherein D represents a divalent radical ##STR23## R 1 is hydrogen or methyl, and in which b denotes a number from 3 to 5 if a = 1, or b denotes 3 or 4 if a = 2, and if a = 2 the two radicals are preferably in the p- or in the m-position to one another.
Claim 2
Dependent Claim
78 words
A fluorine-containing imide of the formula ##STR21## in which a denotes 1 or 2 and R denotes the radical ##STR22## wherein D represents a divalent radical ##STR23## R 1 is hydrogen or methyl, and in which b denotes a number from 3 to 5 if a = 1, or b denotes 3 or 4 if a = 2, and if a = 2 the two radicals are preferably in the p- or in the m-position to one another.
Claim 3
Dependent Claim
11 words
A compound according to claim 1, wherein R 1 denotes hydrogen.
Claim 4
Dependent Claim
10 words
The compound according to claim 1, of the formula ##STR24##
Claim 5
Dependent Claim
10 words
The compound according to claim 1, of the formula ##STR25##
References Cited (Backward Citations)
US3660408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |