C10M 2215/225
The rings containing both nitrogen and oxygen
Official title: the rings containing both nitrogen and oxygen
C10M2215/225 (The rings containing both nitrogen and oxygen) appears on 1,412 US grants and 177 published applications in this corpus.
Search patents in C10M- Granted patents
- 1,412
- Published applications
- 177
- Assignees
- 298
- Inventors
- 1,782
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 63 | 0 |
| 1977 | 51 | 0 |
| 1978 | 82 | 0 |
| 1979 | 66 | 0 |
| 1980 | 48 | 0 |
| 1981 | 53 | 0 |
| 1982 | 50 | 0 |
| 1983 | 45 | 0 |
| 1984 | 28 | 0 |
| 1985 | 26 | 0 |
| 1986 | 21 | 0 |
| 1987 | 34 | 0 |
| 1988 | 32 | 0 |
| 1989 | 60 | 0 |
| 1990 | 44 | 0 |
| 1991 | 45 | 0 |
| 1992 | 48 | 0 |
| 1993 | 46 | 0 |
| 1994 | 62 | 0 |
| 1995 | 43 | 0 |
| 1996 | 65 | 0 |
| 1997 | 50 | 0 |
| 1998 | 73 | 0 |
| 1999 | 44 | 0 |
| 2000 | 34 | 0 |
| 2001 | 41 | 6 |
| 2002 | 28 | 22 |
| 2003 | 21 | 16 |
| 2004 | 10 | 13 |
| 2005 | 10 | 11 |
| 2006 | 3 | 6 |
| 2007 | 1 | 5 |
| 2008 | 2 | 4 |
| 2009 | 4 | 9 |
| 2010 | 6 | 14 |
| 2011 | 3 | 6 |
| 2012 | 3 | 7 |
| 2013 | 6 | 7 |
| 2014 | 8 | 12 |
| 2015 | 11 | 8 |
| 2016 | 12 | 6 |
| 2017 | 9 | 5 |
| 2018 | 5 | 4 |
| 2019 | 2 | 2 |
| 2020 | 1 | 4 |
| 2021 | 5 | 3 |
| 2022 | 3 | 1 |
| 2023 | 1 | 3 |
| 2024 | 2 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 1,4-benzoxazine compounds and lubricant compositions containing the same21 Apr 2026US 12,606,767 B2The Lubrizol Corporation
- Friction reducing additives and process for preparing the same8 Jul 2025US 12,351,774 B2ENI S. p. A.
- Benzazepine compounds as antioxidants for lubricant compositions26 Nov 2024US 12,152,216 B2The Lubrizol Corp tion
- Oil-well metal pipe, and method for producing oil-well metal pipe1 Oct 2024US 12,104,085 B2Nippon Steel Corporation
- Ionic liquids containing quaternary ammonium and phosphonium cations, and their use as environmentally friendly lubricant additives19 Sep 2023US 11,760,766 B2UT-Battelle, LLC
- Hydraulic fluid composition21 May 2026US 2026/0139197 A1The Lubrizol Corporation
- 1,4-Benzoxazine Compounds And Lubricant Compositions Containing The Same10 Apr 2025US 2025/0115823 A1The Lubrizol Corporation
- Benzazepine compounds as antioxidants for lubricant compositions15 Feb 2024US 2024/0052256 A1The Lubrizol Corporation
- Friction reducing additives and process for preparing the same26 Oct 2023US 2023/0340358 A1ENI S. p. A.
- Oil-well metal pipe, and method for producing oil-well metal pipe5 Oct 2023US 2023/0312946 A1Nippon Steel Corporation
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