C09B 5/62
Cyclic imides or amidines of peri-dicarboxylic acids of the anthracene, benzanthrene, or
Official title: Cyclic imides or amidines of peri-dicarboxylic acids of the anthracene, benzanthrene, or perylene series
C09B5/62 (Cyclic imides or amidines of peri-dicarboxylic acids of the anthracene, benzanthrene, or) appears on 304 US grants and 236 published applications in this corpus.
Search patents in C09B- Granted patents
- 304
- Published applications
- 236
- Assignees
- 142
- Inventors
- 612
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 10 | 0 |
| 1999 | 8 | 0 |
| 2000 | 18 | 0 |
| 2001 | 11 | 2 |
| 2002 | 10 | 4 |
| 2003 | 3 | 6 |
| 2004 | 4 | 7 |
| 2005 | 4 | 10 |
| 2006 | 7 | 10 |
| 2007 | 5 | 10 |
| 2008 | 7 | 26 |
| 2009 | 4 | 11 |
| 2010 | 15 | 30 |
| 2011 | 9 | 12 |
| 2012 | 11 | 8 |
| 2013 | 26 | 13 |
| 2014 | 8 | 10 |
| 2015 | 13 | 10 |
| 2016 | 12 | 11 |
| 2017 | 7 | 17 |
| 2018 | 10 | 4 |
| 2019 | 6 | 9 |
| 2020 | 5 | 9 |
| 2021 | 6 | 4 |
| 2022 | 9 | 5 |
| 2023 | 0 | 4 |
| 2024 | 4 | 2 |
| 2025 | 2 | 1 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Dichroic light polarizers162US 6,049,428 AOptiva, Inc. · 2000
- Method and materials for thermostable and lightfast dichroic light polarizers82US 5,739,296 ARussian Technology Group · 1998
- Fluorescent aryloxy-substituted perylene-3,4,9,10-tetracarboxylic acid diimides74US 4,845,223 ABASF SE · 1989
- Concentration of light over a particular area, and novel perylene-3,4,9,10-tetracarboxylic acid diimides63US 4,667,036 ABASF SE · 1987
- Method for thermostable and lightfast dichroic light polarizers54US 6,174,394 B1Optiva, Inc. · 2001