C09K 19/3402
Having oxygen as hetero atom
Official title: {having oxygen as hetero atom (sugars C09K19/0422)}
C09K19/3402 (Having oxygen as hetero atom) appears on 1,209 US grants and 1,225 published applications in this corpus.
Search patents in C09K- Granted patents
- 1,209
- Published applications
- 1,225
- Assignees
- 180
- Inventors
- 1,488
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 10 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 8 | 0 |
| 1987 | 14 | 0 |
| 1988 | 10 | 0 |
| 1989 | 12 | 0 |
| 1990 | 9 | 0 |
| 1991 | 12 | 0 |
| 1992 | 11 | 0 |
| 1993 | 16 | 0 |
| 1994 | 25 | 0 |
| 1995 | 17 | 0 |
| 1996 | 12 | 0 |
| 1997 | 11 | 0 |
| 1998 | 15 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 12 | 1 |
| 2002 | 8 | 15 |
| 2003 | 13 | 24 |
| 2004 | 23 | 28 |
| 2005 | 18 | 38 |
| 2006 | 30 | 31 |
| 2007 | 20 | 40 |
| 2008 | 34 | 32 |
| 2009 | 25 | 33 |
| 2010 | 36 | 44 |
| 2011 | 40 | 54 |
| 2012 | 37 | 31 |
| 2013 | 52 | 51 |
| 2014 | 43 | 68 |
| 2015 | 46 | 93 |
| 2016 | 74 | 129 |
| 2017 | 76 | 93 |
| 2018 | 67 | 107 |
| 2019 | 77 | 79 |
| 2020 | 61 | 56 |
| 2021 | 45 | 46 |
| 2022 | 51 | 29 |
| 2023 | 29 | 30 |
| 2024 | 30 | 19 |
| 2025 | 21 | 33 |
| 2026 | 24 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09K 2019/3422The heterocyclic ring being a six-membered ringIndexing code920
- C09K 19/3405The heterocyclic ring being a five-membered ring325
- C09K 19/3411The heterocyclic ring being a three-membered ring73
- C09K 2019/3416The heterocyclic ring being a four-membered ringIndexing code62
- C09K 2019/343The heterocyclic ring being a seven-membered ringIndexing code21
- C09K 2019/3438Crown ethersIndexing code15
Recent patents
- Liquid crystal medium and electronic component6 Oct 2026US 12,753,345 B2Merck Patent GmbH
- Liquid crystal composition and display panel29 Sep 2026US 12,747,393 B2Tcl China Star Optoelectronics Technology Co., Ltd.
- Liquid-crystalline medium4 Aug 2026US 12,698,444 B2Merck Patent GmbH
- Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element28 Jul 2026US 12,692,440 B2Nissan Chemical Corporation
- Liquid-crystal medium28 Jul 2026US 12,692,441 B2Merck Patent GmbH
- Nonlinear Optical Chromophores Having Tetrahydrocarbazole Donor Groups, Lyotropic Compositions Containing the Same, and Methods of Poling Such Compositions24 Sep 2026US 2026/0286223 A1Lightwave Logic, Inc.
- Liquid crystal composition and use thereof17 Sep 2026US 2026/0275193 A1Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.
- Liquid crystalline medium and compounds20 Aug 2026US 2026/0242665 A1Merck Patent GmbH
- Polymerizable liquid crystal formulations20 Aug 2026US 2026/0242666 A1Merck Patent GmbH
- Liquid-crystalline medium6 Aug 2026US 2026/0226350 A1Merck Patent GmbH
Most cited
By later US patents
- Trifluorobenzene derivative and liquid crystal composition containing the same83US 5,032,313 AChisso Corporation · 1991
- Novel liquid crystal mixtures79US 4,621,901 AHoffmann-La Roche Inc. · 1986
- Cyclohexane derivatives76US 4,510,069 AMerck Patent GmbH · 1985
- Polyhalogenoaromatic compounds for liquid crystal compositions73US 4,551,264 AMerck Patent GmbH · 1985
- Polymerizable, chiral compounds and their use70US 5,780,629 ABASF SE · 1998