US3598803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-phenylazo-2,3-hydroxynaphtholic acid phenyl amide containing a sulfonic acid imido-ureide group
Assignee: Sandoz AG
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Filing: 1967-12-19
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Granted: 1971-08-10
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Expires: 1987-12-19
Abstract
Abstract PIGMENTS OF THE MONOAZO SERIES WHICH CONTAIN A NUCLEARLY BOUND SULFONIC ACID IMIDO-UREIDE GROUP ARE USEFUL FOR THE COLORATION OF PLASTICS, TEXTILES, PAPER, NATURAL RESINS AND RUBBER.
Inventors
- 👤 Armand Henrard
- 👤 Fritz Kehrer
- 👤 Hans Wasem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:13
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/58
Claims Analysis
Total Claims: 0
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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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |