C10L 1/233
Containing nitrogen and oxygen in the ring
Official title: containing nitrogen and oxygen in the ring, e.g. oxazoles {(C10L1/221 takes precedence)}
C10L1/233 (Containing nitrogen and oxygen in the ring) appears on 178 US grants and 94 published applications in this corpus.
Search patents in C10L- Granted patents
- 178
- Published applications
- 94
- Assignees
- 61
- Inventors
- 292
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 9 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 7 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 3 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 1 | 6 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 2 |
| 2010 | 1 | 8 |
| 2011 | 1 | 4 |
| 2012 | 3 | 5 |
| 2013 | 7 | 6 |
| 2014 | 2 | 3 |
| 2015 | 6 | 6 |
| 2016 | 5 | 7 |
| 2017 | 5 | 2 |
| 2018 | 5 | 3 |
| 2019 | 2 | 9 |
| 2020 | 5 | 7 |
| 2021 | 5 | 7 |
| 2022 | 8 | 2 |
| 2023 | 1 | 7 |
| 2024 | 5 | 2 |
| 2025 | 3 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Organic ammonium salts with traceability and detergent dispersant properties to liquid fuels and processes for their synthesis23 Sep 2025US 12,421,186 B2Instituto Mexicano Del Petroleo
- Supramolecular surfactants with detergent-dispersant and corrosion inhibitor properties19 Aug 2025US 12,391,895 B2Instituto Mexicano Del Petroleo
- Friction reducing additives and process for preparing the same8 Jul 2025US 12,351,774 B2ENI S. p. A.
- Catalysis of the reaction between hydrogen sulfide scavengers and hydrogen sulfide using tertiary amines15 Oct 2024US 12,116,542 B2Canadian Energy Services L.P.
- Mannich-based quaternary ammonium salt fuel additives18 Jun 2024US 12,012,564 B2Afton Chemical Corporation
- Hydrogen Sulphide and Mercaptan Scavenging Additive Concentrate Comprising an Oxazolidine Compound and an (Ethoxylated) Phenol Compound17 Sep 2026US 2026/0275216 A1Totalenergies Onetech
- Organic ammonium salts with traceability and detergent dispersant properties to liquid fuels and processes for their synthesis30 Oct 2025US 2025/0333374 A1Instituto Mexicano Del Petroleo
- Organic ammonium salts with traceability and detergent dispersant properties to liquid fuels and processes for their synthesis13 Jun 2024US 2024/0190812 A1Instituto Mexicano Del Petroleo
- Hydrogen sulphide and mercaptans scavenging compositions8 Feb 2024US 2024/0043762 A1Totalenergies Onetech
- Catalysis of the reaction between hydrogen sulfide scavengers and hydrogen sulfide using tertiary amines28 Dec 2023US 2023/0416630 A1Canadian Energy Services L.P.
Most cited
By later US patents
- Suppression of the evolution of hydrogen sulfide gases97US 5,074,991 APetrolite Corporation · 1991
- Method for tagging petroleum products91US 5,525,516 AEastman Chemical Company · 1996
- Oxazoline additives useful in oleaginous compositions70US 4,102,798 AExxon Research & Engineering Co. · 1978
- Fuel composition containing a quaternary ammonium salt65US 5,254,138 AUop LLC · 1993
- Anilines as markers for mineral oils59US 5,627,077 ABASF SE · 1997