C08K 5/16
Nitrogen-containing compounds
Official title: Nitrogen-containing compounds {(C08K5/0091 takes precedence)}
C08K5/16 (Nitrogen-containing compounds) appears on 12,124 US grants and 12,400 published applications in this corpus.
Search patents in C08K- Granted patents
- 12,124
- Published applications
- 12,400
- Assignees
- 3,687
- Inventors
- 28,785
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 259 | 0 |
| 1977 | 216 | 0 |
| 1978 | 282 | 0 |
| 1979 | 146 | 0 |
| 1980 | 167 | 0 |
| 1981 | 139 | 0 |
| 1982 | 137 | 0 |
| 1983 | 143 | 0 |
| 1984 | 159 | 0 |
| 1985 | 156 | 0 |
| 1986 | 112 | 0 |
| 1987 | 136 | 0 |
| 1988 | 165 | 0 |
| 1989 | 173 | 0 |
| 1990 | 175 | 0 |
| 1991 | 222 | 0 |
| 1992 | 215 | 0 |
| 1993 | 231 | 0 |
| 1994 | 181 | 0 |
| 1995 | 140 | 0 |
| 1996 | 138 | 0 |
| 1997 | 157 | 0 |
| 1998 | 173 | 0 |
| 1999 | 174 | 0 |
| 2000 | 169 | 0 |
| 2001 | 167 | 45 |
| 2002 | 191 | 171 |
| 2003 | 172 | 261 |
| 2004 | 167 | 261 |
| 2005 | 122 | 258 |
| 2006 | 123 | 283 |
| 2007 | 127 | 252 |
| 2008 | 104 | 305 |
| 2009 | 134 | 353 |
| 2010 | 213 | 451 |
| 2011 | 200 | 434 |
| 2012 | 232 | 449 |
| 2013 | 271 | 502 |
| 2014 | 333 | 458 |
| 2015 | 383 | 714 |
| 2016 | 419 | 598 |
| 2017 | 454 | 565 |
| 2018 | 403 | 644 |
| 2019 | 449 | 757 |
| 2020 | 529 | 866 |
| 2021 | 511 | 788 |
| 2022 | 451 | 733 |
| 2023 | 473 | 663 |
| 2024 | 471 | 614 |
| 2025 | 394 | 497 |
| 2026 | 266 | 478 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C08K 5/34Heterocyclic compounds having nitrogen in the ring6,240
- C08K 5/17Amines3,157
- C08K 5/20Carboxylic acid amides1,440
- C08K 5/29Compounds containing one or more carbon-to-nitrogen double bonds1,004
- C08K 5/22Compounds containing nitrogen bound to another nitrogen atom599
- C08K 5/32Compounds containing nitrogen bound to oxygen409
- C08K 5/21Urea327
- C08K 5/315Compounds containing carbon-to-nitrogen triple bonds297
All 9 subgroupsShow fewer
Recent patents
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- Optical laminate and display apparatus8 Oct 2026US 2026/0307377 A1Nitto Denko Corporation
- Tire Comprising a Sidewall with at Least One High-Contrast Sidewall Element8 Oct 2026US 2026/0307434 A1Compagnie Generale Des Etablissements Michelin
- Dispersion of titanium dioxide fine particles in organic solvent, method for producing same, and use of same8 Oct 2026US 2026/0308008 A1Ishihara Sangyo Kaisha, Ltd.
- Antidegradant bis(dihydro and tetrahydroquinoline) compounds and uses thereof8 Oct 2026US 2026/0308127 A1Flexsys IP Holdings, LLC
- Foamable Polyurethane Composition Comprising a Fatty Amide8 Oct 2026US 2026/0308307 A1Henkel AG & Co. KGaA
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
- Radio-opaque polymer biomaterials182US 6,475,477 B1Rutgers, The State University · 2002
- Fluorochemical oxazolidinones161US 5,025,052 AMinnesota Mining and Manufacturing Company · 1991
- Base resistant fluoroelastomers153US 4,694,045 AE. I. Du Pont de Nemours and Company · 1987