US4033973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxadiazol-5-yl-coumarin derivatives
Assignee: Novartis Corp
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Filing: 1976-03-25
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Granted: 1977-07-05
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Expires: 1996-03-25
Abstract
Abstract Dyestuffs of the formula ##STR1## wherein R 1 and R 2 represent optionally substituted alkyl groups which can be interrupted by heteroatoms, and R 1 and R 2 together with the nitrogen atom at the aromatic nucleus are able to form a 5- or 6-membered ring, X represents a NH group or an oxygen atom and R represents an organic radical. the dyestuffs dye polyester fibers in brilliant yellow shades.
Inventors
- 👤 Hansrudolf Schwander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:50
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/008; C09B57/00; C09B57/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
A dyestuff of the formula ##STR49## wherein R 1 and R 2 independently represent methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, β-chloroethyl, β-hydroxyethyl, β-cyanoethyl, γ-cyanopropyl, β-methoxyethyl, β-acetoxyethyl, β-butyryloxyethyl, methoxycarbonylethyl, ethoxycarbonylethyl, phenylethyl or benzyl; and Y and Z independently represent lower alkyl, lower alkoxy, hydroxy, halo or hydrogen.
Claim 2
Dependent Claim
50 words
A dyestuff of the formula ##STR49## wherein R 1 and R 2 independently represent methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, β-chloroethyl, β-hydroxyethyl, β-cyanoethyl, γ-cyanopropyl, β-methoxyethyl, β-acetoxyethyl, β-butyryloxyethyl, methoxycarbonylethyl, ethoxycarbonylethyl, phenylethyl or benzyl; and Y and Z independently represent lower alkyl, lower alkoxy, hydroxy, halo or hydrogen.
Claim 3
Dependent Claim
36 words
A dyestuff of the formula ##STR50## wherein R 1 and R 2 independently represent methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, β-chloroethyl, β-hydroxyethyl, β-cyanoethyl, γ-cyanopropyl, β-methoxyethyl, β-acetoxyethyl, β-butylryloxyethyl, methoxycarbonylethyl, ethoxycarbonylethyl, phenylethyl or benzyl.
Claim 4
Dependent Claim
36 words
A dyestuff of the formula ##STR50## wherein R 1 and R 2 independently represent methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, β-chloroethyl, β-hydroxyethyl, β-cyanoethyl, γ-cyanopropyl, β-methoxyethyl, β-acetoxyethyl, β-butylryloxyethyl, methoxycarbonylethyl, ethoxycarbonylethyl, phenylethyl or benzyl.
Claim 5
Dependent Claim
36 words
A dyestuff of the formula ##STR51## wherein R 1 and R 2 independently represent methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, β-chloroethyl, β-hydroxyethyl, β-cyanoethyl, γ-cyanopropyl, β-methoxyethyl, β-acetoxyethyl, β-butyryloxyethyl, methoxycarbonylethyl, ethoxycarbonylethyl, phenylethyl or benzyl.
Claim 6
Dependent Claim
36 words
A dyestuff of the formula ##STR51## wherein R 1 and R 2 independently represent methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, β-chloroethyl, β-hydroxyethyl, β-cyanoethyl, γ-cyanopropyl, β-methoxyethyl, β-acetoxyethyl, β-butyryloxyethyl, methoxycarbonylethyl, ethoxycarbonylethyl, phenylethyl or benzyl.
Claim 7
Dependent Claim
10 words
The dyestuff according to claim 3 of the formula ##STR52##
Claim 8
Dependent Claim
10 words
The dyestuff according to claim 2 of the formula ##STR53##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |