C10M 2215/221
Six-membered rings containing nitrogen and carbon only
C10M2215/221 (Six-membered rings containing nitrogen and carbon only) appears on 1,488 US grants and 374 published applications in this corpus.
Search patents in C10M- Granted patents
- 1,488
- Published applications
- 374
- Assignees
- 368
- Inventors
- 2,075
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 64 | 0 |
| 1977 | 54 | 0 |
| 1978 | 82 | 0 |
| 1979 | 66 | 0 |
| 1980 | 48 | 0 |
| 1981 | 54 | 0 |
| 1982 | 49 | 0 |
| 1983 | 44 | 0 |
| 1984 | 27 | 0 |
| 1985 | 26 | 0 |
| 1986 | 20 | 0 |
| 1987 | 33 | 0 |
| 1988 | 30 | 0 |
| 1989 | 60 | 0 |
| 1990 | 43 | 0 |
| 1991 | 42 | 0 |
| 1992 | 43 | 0 |
| 1993 | 45 | 0 |
| 1994 | 62 | 0 |
| 1995 | 39 | 0 |
| 1996 | 61 | 0 |
| 1997 | 46 | 0 |
| 1998 | 72 | 0 |
| 1999 | 41 | 0 |
| 2000 | 32 | 0 |
| 2001 | 34 | 4 |
| 2002 | 22 | 21 |
| 2003 | 21 | 14 |
| 2004 | 10 | 18 |
| 2005 | 8 | 16 |
| 2006 | 3 | 11 |
| 2007 | 3 | 15 |
| 2008 | 4 | 16 |
| 2009 | 10 | 22 |
| 2010 | 12 | 23 |
| 2011 | 13 | 14 |
| 2012 | 14 | 14 |
| 2013 | 12 | 14 |
| 2014 | 16 | 25 |
| 2015 | 15 | 26 |
| 2016 | 16 | 16 |
| 2017 | 15 | 18 |
| 2018 | 15 | 21 |
| 2019 | 11 | 10 |
| 2020 | 8 | 11 |
| 2021 | 10 | 8 |
| 2022 | 8 | 7 |
| 2023 | 7 | 6 |
| 2024 | 4 | 9 |
| 2025 | 8 | 11 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Anti-stiction ionic lubricants in MEMS devices11 Aug 2026US 12,703,834 B1Texas Instruments Incorporated
- Multipurpose oxypyridinones and their functional use—121 Apr 2026US 12,606,765 B2Infineum International Limited
- Multipurpose oxypyridinones and their functional use-421 Apr 2026US 12,606,766 B2Infineum International Limited
- Refrigerator oil composition and mixed composition for refrigerator27 Jan 2026US 12,534,656 B2Idemitsu Kosan Co., Ltd.
- Grease composition, pivot assembly bearing, and bearing apparatus including the bearing27 Jan 2026US 12,534,680 B2MINEBEA MITSUMI Inc.
- Antidegradant bis(dihydro and tetrahydroquinoline) compounds and uses thereof8 Oct 2026US 2026/0308127 A1Flexsys IP Holdings, LLC
- Polyamide resin composition8 Oct 2026US 2026/0308472 A1Ube Corporation
- Grease composition10 Sep 2026US 2026/0265636 A1Adeka Corporation
- Hydraulic fluid composition21 May 2026US 2026/0139197 A1The Lubrizol Corporation
- Quinolineamine antidegradant compounds and uses thereof4 Dec 2025US 2025/0368607 A1
Most cited
By later US patents
- Lubricating composition228US 4,956,122 AUniroyal Chemical Company, Inc. · 1990
- Polybutyl-and polyisobutylamines, their preparation, and fuel compositions containing these135US 4,832,702 ABASF SE · 1989
- Oil-soluble phosphorus antiwear additives for lubricants118US 4,857,214 AEthylk Petroleum Additives, Inc. · 1989
- Stabilized imide graft of ethylene copolymeric additives for lubricants117US 4,137,185 AExxon Research & Engineering Co. · 1979
- Extended life functional fluid116US 3,933,659 AChevron Research Company · 1976