C09K 2323/027
Polyimide
C09K2323/027 (Polyimide) appears on 506 US grants and 403 published applications in this corpus.
Search patents in C09K- Granted patents
- 506
- Published applications
- 403
- Assignees
- 160
- Inventors
- 891
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 10 | 0 |
| 1995 | 18 | 0 |
| 1996 | 15 | 0 |
| 1997 | 18 | 0 |
| 1998 | 13 | 0 |
| 1999 | 15 | 0 |
| 2000 | 13 | 0 |
| 2001 | 17 | 5 |
| 2002 | 12 | 12 |
| 2003 | 11 | 12 |
| 2004 | 17 | 24 |
| 2005 | 5 | 7 |
| 2006 | 18 | 21 |
| 2007 | 11 | 18 |
| 2008 | 7 | 12 |
| 2009 | 13 | 13 |
| 2010 | 16 | 27 |
| 2011 | 12 | 23 |
| 2012 | 14 | 23 |
| 2013 | 24 | 21 |
| 2014 | 29 | 24 |
| 2015 | 15 | 19 |
| 2016 | 20 | 21 |
| 2017 | 21 | 21 |
| 2018 | 22 | 19 |
| 2019 | 11 | 27 |
| 2020 | 19 | 26 |
| 2021 | 21 | 21 |
| 2022 | 23 | 3 |
| 2023 | 8 | 1 |
| 2024 | 4 | 0 |
| 2025 | 0 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Polyimide-based polymer film, substrate for display device, and optical device using the same17 Feb 2026US 12,552,900 B2LG Chem.Ltd.
- Liquid crystal display device and manufacturing method thereof27 Aug 2024US 12,072,581 B2Japan Display Inc.
- Polyimide-based polymer film, substrate for display device, and optical device using the same20 Aug 2024US 12,065,543 B2LG Chem.Ltd.
- Polyimide precursor composition and polyimide film, substrate for display device, and optical device prepared by using same13 Aug 2024US 12,060,456 B2LG Chem.Ltd.
- Polyimide-based polymer film, substrate for display device, and optical device using the same4 Jun 2024US 11,999,823 B2LG Chem.Ltd.
- Display panel, alignment film composition and display device18 Dec 2025US 2025/0382418 A1Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., LTd.
- Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element14 Aug 2025US 2025/0257265 A1Nissan Chemical Corporation
- Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display element8 May 2025US 2025/0145888 A1Nissan Chemical Corporation
- Liquid crystal display device and manufacturing method thereof31 Aug 2023US 2023/0273483 A1Japan Display Inc.
- Liquid crystal display device and manufacturing method thereof13 Oct 2022US 2022/0326577 A1Japan Display Inc.
Most cited
By later US patents
- Negative birefringent polyimide films102US 5,344,916 AThe University of Akron · 1994
- Alignment layer with reactive mesogens for aligning liquid crystal molecules90US 8,481,130 B2Merck Patent GmbH · 2013
- Plastic substrates for electronic display applications50US 6,322,860 B1Rohm and Haas Company · 2001
- Polyimide angularity enhancement layer49US 5,750,641 AMinnesota Mining and Manufacturing Company · 1998
- Liquid crystal device and liquid crystal apparatus48US 5,686,019 ACanon Kabushiki Kaisha · 1997