C08K 5/34
Heterocyclic compounds having nitrogen in the ring
C08K5/34 (Heterocyclic compounds having nitrogen in the ring) appears on 6,240 US grants and 6,204 published applications in this corpus.
Search patents in C08K- Granted patents
- 6,240
- Published applications
- 6,204
- Assignees
- 2,055
- Inventors
- 15,042
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 122 | 0 |
| 1977 | 102 | 0 |
| 1978 | 139 | 0 |
| 1979 | 68 | 0 |
| 1980 | 97 | 0 |
| 1981 | 73 | 0 |
| 1982 | 81 | 0 |
| 1983 | 83 | 0 |
| 1984 | 72 | 0 |
| 1985 | 77 | 0 |
| 1986 | 55 | 0 |
| 1987 | 73 | 0 |
| 1988 | 94 | 0 |
| 1989 | 96 | 0 |
| 1990 | 96 | 0 |
| 1991 | 130 | 0 |
| 1992 | 113 | 0 |
| 1993 | 128 | 0 |
| 1994 | 101 | 0 |
| 1995 | 88 | 0 |
| 1996 | 87 | 0 |
| 1997 | 92 | 0 |
| 1998 | 110 | 0 |
| 1999 | 99 | 0 |
| 2000 | 95 | 0 |
| 2001 | 99 | 25 |
| 2002 | 108 | 106 |
| 2003 | 91 | 148 |
| 2004 | 96 | 134 |
| 2005 | 66 | 130 |
| 2006 | 68 | 161 |
| 2007 | 62 | 113 |
| 2008 | 56 | 145 |
| 2009 | 59 | 161 |
| 2010 | 117 | 232 |
| 2011 | 91 | 214 |
| 2012 | 113 | 225 |
| 2013 | 129 | 243 |
| 2014 | 161 | 229 |
| 2015 | 183 | 400 |
| 2016 | 197 | 304 |
| 2017 | 257 | 284 |
| 2018 | 208 | 311 |
| 2019 | 218 | 359 |
| 2020 | 234 | 432 |
| 2021 | 268 | 377 |
| 2022 | 226 | 357 |
| 2023 | 223 | 323 |
| 2024 | 232 | 291 |
| 2025 | 188 | 269 |
| 2026 | 119 | 231 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Resin composition, prepreg, film provided with resin, metal foil provided with resin, metal-clad laminate, and wiring board6 Oct 2026US 12,753,301 B2Panasonic Intellectual Property Management Co., Ltd.
- Release coating compositions and articles therefrom6 Oct 2026US 12,753,325 B23M Innovative Properties Company
- Polyester film for window attachment, and polyester film layered body for window attachment29 Sep 2026US 12,747,327 B2Mitsubishi Chemical Corporation
- Compositions for elastomeric compounds comprising tetrazole compatibilizing agents and tyres comprising the same29 Sep 2026US 12,747,335 B2Pirelli Tyre S. P. A.
- Polymerizable composition for optical material, optical material, and use thereof29 Sep 2026US 12,747,336 B2Mitsui Chemicals, Inc.
- Tire Comprising a Sidewall with at Least One High-Contrast Sidewall Element8 Oct 2026US 2026/0307434 A1Compagnie Generale Des Etablissements Michelin
- Antidegradant bis(dihydro and tetrahydroquinoline) compounds and uses thereof8 Oct 2026US 2026/0308127 A1Flexsys IP Holdings, LLC
- Polycarbonate-based resin composition and molded article8 Oct 2026US 2026/0308318 A1Idemitsu Kosan Co., Ltd.
- Elastomer compositions comprising at least one sp2 hybridized carbon allotrope and a 2,5-disubstituted pyrrole derivative8 Oct 2026US 2026/0308352 A1Pirelli Tyre S. P. A.
- Polymer composition for moulded article8 Oct 2026US 2026/0308357 A1Borealis AG
Most cited
By later US patents
- Ultraviolet absorbing polymers comprising 2-hydroxy-5-acrylyloxyphenyl-2H-benzotriazoles297US 4,528,311 AIolab Corporation · 1985
- Photochromic naphthopyran compounds213US 5,274,132 ATransitions Optical, Inc. · 1993
- Fluorochemical oxazolidinones161US 5,025,052 AMinnesota Mining and Manufacturing Company · 1991
- Flame-retardant combination152US 6,255,371 B1Clariant GmbH · 2001
- Benzofuranone or indolinone compounds useful as stabilizers for organic materials149US 4,325,863 ASandoz Ltd. · 1982