C10M 133/48
The ring containing both nitrogen and oxygen
Official title: the ring containing both nitrogen and oxygen
C10M133/48 (The ring containing both nitrogen and oxygen) appears on 93 US grants and 42 published applications in this corpus.
Search patents in C10M- Granted patents
- 93
- Published applications
- 42
- Assignees
- 42
- Inventors
- 187
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 6 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 0 |
| 2005 | 2 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 2 | 6 |
| 2011 | 0 | 4 |
| 2012 | 1 | 3 |
| 2013 | 2 | 3 |
| 2014 | 4 | 4 |
| 2015 | 2 | 1 |
| 2016 | 2 | 1 |
| 2017 | 3 | 1 |
| 2018 | 1 | 4 |
| 2019 | 0 | 1 |
| 2020 | 4 | 3 |
| 2021 | 2 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
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
- Azaphenothiazines and azaphenoxazines as antioxidants29 Nov 2022US 11,512,262 B2University of Ottawa
- Metal working fluid27 Apr 2021US 10,988,703 B2Italmatch Chemicals SC LLC
- Composition containing heterocyclic compounds and a method of lubricating an internal combustion engine9 Feb 2021US 10,913,915 B2The Lubrizol Corporation
- Polymeric viscosity modifiers for use in lubricants17 Nov 2020US 10,836,976 B2Afton Chemical Corporation
- 1,4-Benzoxazine Compounds And Lubricant Compositions Containing The Same10 Apr 2025US 2025/0115823 A1The Lubrizol Corporation
- Organoboron compound, preparation method thereof, and use thereof9 Jan 2025US 2025/0011341 A1China Petroleum & Chemical Corporation
- Metal Working Fluid21 Jan 2021US 2021/0017465 A1Italmatch Chemicals SC LLC
- Composition Containing Heterocyclic Compounds And A Method Of Lubricating An Internal Combustion Engine23 Apr 2020US 2020/0123463 A1The Lubrizol Corporation
- Polymeric viscosity modifiers for use in lubricants23 Jan 2020US 2020/0024542 A1Afton Chemical Corporation
Most cited
By later US patents
- Lactone oxazolines as oleaginous additives51US 4,062,786 AExxon Research & Engineering Co. · 1977
- Lubricating oil composition44US 4,375,418 ATexaco Inc. · 1983
- Method for reducing piston deposits31US 4,906,389 AExxon Research & Engineering Co. · 1990
- Turbine lubricant and method25US 3,931,022 ATexaco Inc. · 1976
- Stabilized polymers, novel stabilizers, and synthesis thereof25US 4,310,429 AThe B. F. Goodrich Company · 1982