US3627748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monodazo pigments containing a benzoxazolone or benzithiazalone radical
Assignee: BASF Schweiz AG
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Filing: 1968-12-24
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Granted: 1971-12-14
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Expires: 1988-12-24
Abstract
Abstract Azo dyestuffs of the formula IN WHICH R1 represents an aryl residue, R2 represents a naphthalene residue in which the azo, hydroxyl and carboxylic acid amide groups are in 1,2,3-position and R3 represents a benzoxazolone or benzthiazolone radical bound to the -NH- group in 5- of 6-position or R3 represents an acridone radical are valuable pigments which are useful for coloring plastic masses in orange to red shades of high fastness to light and migration.
Inventors
- 👤 Armand Roueche
- 👤 Willy Mueller
- 👤 Rudolf Mory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:12
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/32; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437; C08K5/35
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
An azo pigment of the formula
References Cited (Backward Citations)
US2725375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |