C09K 19/322
Compounds containing a naphthalene ring or a completely or partially hydrogenated naphthalene
Official title: {Compounds containing a naphthalene ring or a completely or partially hydrogenated naphthalene ring}
C09K19/322 (Compounds containing a naphthalene ring or a completely or partially hydrogenated naphthalene) appears on 542 US grants and 531 published applications in this corpus.
Search patents in C09K- Granted patents
- 542
- Published applications
- 531
- Assignees
- 129
- Inventors
- 962
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 8 | 0 |
| 1992 | 13 | 0 |
| 1993 | 10 | 0 |
| 1994 | 17 | 0 |
| 1995 | 12 | 0 |
| 1996 | 7 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 6 | 2 |
| 2002 | 2 | 4 |
| 2003 | 6 | 10 |
| 2004 | 13 | 9 |
| 2005 | 2 | 10 |
| 2006 | 13 | 15 |
| 2007 | 8 | 9 |
| 2008 | 9 | 15 |
| 2009 | 13 | 27 |
| 2010 | 26 | 26 |
| 2011 | 19 | 27 |
| 2012 | 18 | 22 |
| 2013 | 29 | 28 |
| 2014 | 22 | 43 |
| 2015 | 34 | 50 |
| 2016 | 38 | 44 |
| 2017 | 29 | 36 |
| 2018 | 25 | 41 |
| 2019 | 25 | 25 |
| 2020 | 25 | 18 |
| 2021 | 10 | 10 |
| 2022 | 17 | 14 |
| 2023 | 11 | 16 |
| 2024 | 12 | 11 |
| 2025 | 8 | 13 |
| 2026 | 7 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Liquid crystal compounds16 Jun 2026US 12,655,349 B2Rolic Technologies AG
- Polymerizable liquid crystal composition, optically anisotropic layer, optical film, polarizing plate, and image display device9 Jun 2026US 12,649,878 B2FUJIFILM Corporation
- Device for the regulation of light transmission5 May 2026US 12,619,110 B2Merck Patent GmbH
- Optically anisotropic layer, optical film, polarizing plate, and image display device28 Apr 2026US 12,612,553 B2FUJIFILM Corporation
- Optically anisotropic layer, optical film, polarizing plate, and image display device24 Feb 2026US 12,559,679 B2FUJIFILM Corporation
- Chiral reactive mesogen mixture24 Sep 2026US 2026/0286221 A1Merck Patent GmbH
- Polymerizable liquid crystal formulations20 Aug 2026US 2026/0242666 A1Merck Patent GmbH
- Reactive mesogens with high birefringence13 Aug 2026US 2026/0234472 A1Merck Patent GmbH
- Polymerizable compound, liquid crystal composition comprising same and liquid crystal display device9 Jul 2026US 2026/0193537 A1Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.
- Liquid crystal compounds18 Jun 2026US 2026/0167867 A1Rolic Technologies AG
Most cited
By later US patents
- Hydrogenated naphthalenes137US 4,391,731 AHoffmann-La Roche Inc. · 1983
- Smectic liquid crystals132US 4,613,209 AAT&T Bell Laboratories · 1986
- Polymerizable, chiral compounds and their use70US 5,780,629 ABASF SE · 1998
- Fluorine-containing chiral smectic liquid crystals65US 4,886,619 AMinnesota Mining and Manufacturing Company · 1989
- Liquid crystalline materials62US 4,113,647 AThe Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland · 1978