C08L 79/04
Polycondensates having nitrogen-containing heterocyclic rings in the main chain
Official title: Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
C08L79/04 (Polycondensates having nitrogen-containing heterocyclic rings in the main chain) appears on 2,854 US grants and 3,070 published applications in this corpus.
Search patents in C08L- Granted patents
- 2,854
- Published applications
- 3,070
- Assignees
- 1,048
- Inventors
- 7,096
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 21 | 0 |
| 1978 | 17 | 0 |
| 1979 | 14 | 0 |
| 1980 | 15 | 0 |
| 1981 | 23 | 0 |
| 1982 | 27 | 0 |
| 1983 | 28 | 0 |
| 1984 | 33 | 0 |
| 1985 | 34 | 0 |
| 1986 | 29 | 0 |
| 1987 | 25 | 0 |
| 1988 | 23 | 0 |
| 1989 | 46 | 0 |
| 1990 | 48 | 0 |
| 1991 | 51 | 0 |
| 1992 | 78 | 0 |
| 1993 | 62 | 0 |
| 1994 | 56 | 0 |
| 1995 | 41 | 0 |
| 1996 | 55 | 0 |
| 1997 | 42 | 0 |
| 1998 | 30 | 0 |
| 1999 | 43 | 0 |
| 2000 | 38 | 0 |
| 2001 | 34 | 8 |
| 2002 | 31 | 46 |
| 2003 | 35 | 44 |
| 2004 | 32 | 60 |
| 2005 | 29 | 67 |
| 2006 | 38 | 66 |
| 2007 | 35 | 71 |
| 2008 | 24 | 95 |
| 2009 | 42 | 122 |
| 2010 | 59 | 162 |
| 2011 | 69 | 151 |
| 2012 | 84 | 147 |
| 2013 | 103 | 154 |
| 2014 | 107 | 129 |
| 2015 | 124 | 112 |
| 2016 | 100 | 136 |
| 2017 | 92 | 106 |
| 2018 | 83 | 172 |
| 2019 | 98 | 182 |
| 2020 | 147 | 169 |
| 2021 | 120 | 189 |
| 2022 | 104 | 184 |
| 2023 | 114 | 165 |
| 2024 | 112 | 144 |
| 2025 | 98 | 117 |
| 2026 | 53 | 72 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Synthesis of self-healing benzoxazine polymers through melt polymerization6 Oct 2026US 12,753,281 B2Kaneka Corporation
- Water based polyimide-powder coating composition and method for manufacturing composite separator for lithium secondary battery using same29 Sep 2026US 12,749,769 B2University Industry Foundation, Yonsei University Wonju Campus
- Resin mixture, method of producing resin mixture, stretch blow molded product, and method of producing stretch blow molded product22 Sep 2026US 12,742,040 B2Canon Kabushiki Kaisha
- Curable film composition, curable film, and cured product thereof22 Sep 2026US 12,742,059 B2Thintronics, Inc.
- All-aromatic liquid-crystalline homo-polyimides with aromatic endgroups and crosslinked products therefrom15 Sep 2026US 12,734,747 B2The United States of America as represented by the Secretary of the Air Force
- Maleimide resin, resin composition, cured product, sheet, laminate, and printed wiring board1 Oct 2026US 2026/0297264 A1Resonac Corporation
- Resin composition and article made therefrom1 Oct 2026US 2026/0297327 A1Elite Material Co., Ltd.
- Resin composition, and prepreg and use thereof10 Sep 2026US 2026/0265473 A1Guangdong Hinno-Tech Co., Ltd.
- Intermediate transfer body, transfer unit, and image forming apparatus27 Aug 2026US 2026/0252005 A1FUJIFILM Business Innovation Corp.
- Photosensitive composition, transfer film, method for manufacturing laminate, laminate, and semiconductor package27 Aug 2026US 2026/0256003 A1FUJIFILM Corporation
Most cited
By later US patents
- Kink-free spiral-wound catheter385US 5,454,795 ATarget Therapeutics, Inc. · 1995
- Kink-free spiral-wound catheter259US 5,695,483 ATarget Therapeutics, Inc. · 1997
- Adhesive tapes247US 5,277,972 ATomoegawa Paper Co., Ltd. · 1994
- Adhesive tapes220US 5,683,806 ATomoegawa Paper Co., Ltd. · 1997
- Packaging190US 5,021,515 ACMB Foodcan plc · 1991