C09B 35/469
D being derived from heterocyclic diamine
Official title: {D being derived from heterocyclic diamine}
C09B35/469 (D being derived from heterocyclic diamine) appears on 3 US grants and 0 published applications in this corpus.
Search patents in C09B- Granted patents
- 3
- Published applications
- 0
- Assignees
- 2
- Inventors
- 9
- Latest grant
- 17 Apr 1990
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Water-soluble black trisazo dyestuffs17 Apr 1990US 4,917,731 A
- Water-soluble trisazo 8-amino-naphthol-1 dyes5 Jul 1977US 4,033,945 ACassella Farbwerke Mainkur Aktiengesellschaft
- Asymmetrical frisazo dyestuffs derived from diazotized 2,7-diamino-carbazole29 Jun 1976US 3,966,703 ABayer Aktiengesellschaft
No published applications in this class yet.
Most cited
By later US patents