C09B 35/227
The tetrazo component being a derivative of a diaryl sulfide or a
Official title: the tetrazo component being a derivative of a diaryl sulfide or a diaryl polysulfide
C09B35/227 (The tetrazo component being a derivative of a diaryl sulfide or a) appears on 4 US grants and 0 published applications in this corpus.
Search patents in C09B- Granted patents
- 4
- Published applications
- 0
- Assignees
- 2
- Inventors
- 5
- Latest grant
- 1 May 1990
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 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
- Photoreceptor for electrophotography1 May 1990US 4,921,770 A
- Monoazo and disazo colorants1 Nov 1983US 4,412,950 ASterling Drug Inc.
- Novel monoazo and disazo colorants15 Mar 1983US 4,376,729 ASterling Drug Inc.
- Liquid disazo dyestuffs derived from diphenylsulphide16 Aug 1977US 4,042,579 AProduits Chimiques Ugine Kuhlmann
No published applications in this class yet.
Most cited
By later US patents
- Photoreceptor for electrophotography9US 4,921,770 A1990
- Novel monoazo and disazo colorants4US 4,376,729 ASterling Drug Inc. · 1983
- Monoazo and disazo colorants2US 4,412,950 ASterling Drug Inc. · 1983
- Liquid disazo dyestuffs derived from diphenylsulphide1US 4,042,579 AProduits Chimiques Ugine Kuhlmann · 1977