US3919188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo dyes of the benzisothiazole series which are not soluble in water
Assignee: BASF SE
•
Filing: 1970-09-23
•
Granted: 1975-11-11
•
Expires: 1990-09-23
Abstract
Abstract Monoazo dyes having a diazo component derived from a 4-amino-7nitro-1,2-benzisothiazole optionally substituted in the 5position by chlorine, bromine, nitro or cyano and a substituted aniline as coupling component. The dyes are eminently suitable for dyeing synthetic linear polyesters.
Inventors
- 👤 Helmut Hagen
- 👤 Guenter Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:56
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/06; C; C09; C09B; C09B29/00; C09B29/0025; D06; D06P; D06P1/00; D06P1/16; D06P1/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
6 words
A MONOAZO DYE HAVING THE FORMULA:
Claim 2
Dependent Claim
6 words
A MONOAZO DYE HAVING THE FORMULA:
Claim 3
Dependent Claim
6 words
A monoazo dye having the formula:
Claim 4
Dependent Claim
6 words
A monoazo dye having the formula:
Claim 5
Dependent Claim
5 words
The dye having the formula:
Claim 6
Dependent Claim
5 words
The dye having the formula:
References Cited (Backward Citations)
US3455898A
Cited
US3573273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |