B01J 31/2208
Oxygen
Official title: {Oxygen, e.g. acetylacetonates}
B01J31/2208 (Oxygen) appears on 1,699 US grants and 1,596 published applications in this corpus.
Search patents in B01J- Granted patents
- 1,699
- Published applications
- 1,596
- Assignees
- 831
- Inventors
- 4,390
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 26 | 0 |
| 1977 | 12 | 0 |
| 1978 | 12 | 0 |
| 1979 | 12 | 0 |
| 1980 | 18 | 0 |
| 1981 | 17 | 0 |
| 1982 | 23 | 0 |
| 1983 | 19 | 0 |
| 1984 | 16 | 0 |
| 1985 | 15 | 0 |
| 1986 | 11 | 0 |
| 1987 | 16 | 0 |
| 1988 | 11 | 0 |
| 1989 | 19 | 0 |
| 1990 | 14 | 0 |
| 1991 | 16 | 0 |
| 1992 | 25 | 0 |
| 1993 | 20 | 0 |
| 1994 | 18 | 0 |
| 1995 | 13 | 0 |
| 1996 | 23 | 0 |
| 1997 | 22 | 0 |
| 1998 | 28 | 0 |
| 1999 | 21 | 0 |
| 2000 | 30 | 0 |
| 2001 | 41 | 10 |
| 2002 | 43 | 37 |
| 2003 | 50 | 52 |
| 2004 | 36 | 39 |
| 2005 | 37 | 64 |
| 2006 | 36 | 36 |
| 2007 | 31 | 36 |
| 2008 | 21 | 36 |
| 2009 | 15 | 57 |
| 2010 | 41 | 52 |
| 2011 | 30 | 63 |
| 2012 | 39 | 39 |
| 2013 | 36 | 59 |
| 2014 | 44 | 62 |
| 2015 | 60 | 68 |
| 2016 | 60 | 79 |
| 2017 | 76 | 75 |
| 2018 | 50 | 72 |
| 2019 | 76 | 98 |
| 2020 | 68 | 83 |
| 2021 | 69 | 107 |
| 2022 | 72 | 94 |
| 2023 | 73 | 80 |
| 2024 | 77 | 84 |
| 2025 | 39 | 73 |
| 2026 | 22 | 41 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01J 31/2226Anionic ligands, i.e. the overall ligand carries at least one formal negative1,267
- B01J 31/2213At least two complexing oxygen atoms present in an at least bidentate124
- B01J 31/2217At least one oxygen and one nitrogen atom present as complexing atoms87
- B01J 31/2221At least one oxygen and one phosphorous atom present as complexing atoms13
Recent patents
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Most cited
By later US patents
- Silica-coated alumina activator-supports for metallocene catalyst compositions292US 7,884,163 B2Chevron Phillips Chemical Company LP · 2011
- Highly active double metal cyanide catalysts250US 5,482,908 AARCO Chemical Technology, L. P. · 1996
- Polymerization of .alpha.-olefins with transition metal catalysts based on bidentate ligands containing pyridine or quinoline moiety209US 5,637,660 ALyondell Petrochemical Company · 1997
- Metal nanocrystals and synthesis thereof117US 6,645,444 B2Nanospin Solutions · 2003
- Method of preparing ruthenium and osmium carbene complexes104US 5,710,298 ACalifornia Institute of Technology · 1998