US3994907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coumarin derivatives, their preparation and their use as optical brightening agents
Assignee: Produits Chimiques Ugine Kuhlmann
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Filing: 1975-01-14
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Granted: 1976-11-30
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Expires: 1995-01-14
Abstract
Abstract Coumarin of the formula:
Inventors
- 👤 Annick Marthe Suzanne Simone Domergue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:05
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/12; C07C; C07C259/00; C07C259/12; C07C259/18; D; D06; D06L; D06L4/00; D06L4/60; D06L4/607
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
79 words
Coumarin of the formula: ##SPC6## in which R 1 is alkyl containing 1 to 5 carbon atoms, said alkyl being unsubstituted or substituted by one chlorine, bromine, hydroxy or alkoxy containing 1-4 carbon atoms, R 2 is unsubstituted phenyl, phenyl substituted by one or two chlorine, bromine, alkyl containing 1-4 carbon atoms, alkylsulphonyl containing 1-4 carbon atoms, alkoxy containing 1-4 carbon atoms or fluoroalkoxy containing 1-4 carbon atoms or is 3- or 4-pyridyl, pyrazolyl, oxadiazolyl, or 3', 5'-dimethyl-4-pyrazolyl (1')-phenyl.
Claim 2
Dependent Claim
79 words
Coumarin of the formula: ##SPC6## in which R 1 is alkyl containing 1 to 5 carbon atoms, said alkyl being unsubstituted or substituted by one chlorine, bromine, hydroxy or alkoxy containing 1-4 carbon atoms, R 2 is unsubstituted phenyl, phenyl substituted by one or two chlorine, bromine, alkyl containing 1-4 carbon atoms, alkylsulphonyl containing 1-4 carbon atoms, alkoxy containing 1-4 carbon atoms or fluoroalkoxy containing 1-4 carbon atoms or is 3- or 4-pyridyl, pyrazolyl, oxadiazolyl, or 3', 5'-dimethyl-4-pyrazolyl (1')-phenyl.
Claim 3
Dependent Claim
42 words
Coumarin according to claim 1 in which R 2 is unsubstituted phenyl or phenyl substituted by one or two chlorine, bromine, alkyl containing 1-4 carbon atoms, alkylsulphonyl containing 1-4 carbon atoms, alkoxy containing 1-4 carbon atoms or fluoroalkoxy containing 1-4 carbon atoms.
Claim 4
Dependent Claim
42 words
Coumarin according to claim 1 in which R 2 is the radical of formula: ##SPC7## wherein X is hydrogen, chlorine, bromine, alkyl containing 1-4 carbon atoms, alkylsulphonyl containing 1-4 carbon atoms, alkoxy containing 1-4 carbon atoms or fluoroalkoxy containing 1-4 carbon atoms.
Claim 5
Dependent Claim
13 words
Coumarin according to claim 1 in which R 3 is 3- or 4-pyridyl.
Claim 6
Dependent Claim
2 words
7-methoxy-3-(3-phenyl-1,2,4-oxadiazol-5-yl) coumarin.
Claim 7
Dependent Claim
2 words
7-methoxy-3-(3-phenyl-1,2,4-oxadiazol-5-yl) coumarin.
Claim 8
Dependent Claim
2 words
7-methoxy-3-(3-p-tolyl-1,2,4-oxadiazol-5-yl) coumarin.
Claim 9
Dependent Claim
2 words
7-methoxy-3-(3-p-tolyl-1,2,4-oxadiazol-5-yl) coumarin.
Claim 10
Dependent Claim
2 words
7-methoxy-3-[3-(2-chlorophenyl)-1,2,4-oxadiazol-5-yl] coumarin.
Claim 11
Dependent Claim
2 words
7-methoxy-3-[3-(2-chlorophenyl)-1,2,4-oxadiazol-5-yl] coumarin.
Claim 12
Dependent Claim
2 words
7-methoxy-3-[3-(3-pyridinyl)-1,2,4-oxadiazol-5-yl] coumarin.
Claim 13
Dependent Claim
2 words
7-methoxy-3-[3-(3-pyridinyl)-1,2,4-oxadiazol-5-yl] coumarin.
Claim 14
Dependent Claim
2 words
7-methoxy-3-{3-[2-(2,2,2-trifluoroethoxy)phenyl]-1,2,4-oxadiazol-5-yl} coumarin.
Claim 15
Dependent Claim
2 words
7-methoxy-3-{3-[2-(2,2,2-trifluoroethoxy)phenyl]-1,2,4-oxadiazol-5-yl} coumarin.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |