C10L 1/2227
Urea
Official title: {urea; derivatives thereof; urethane (C10L1/221 takes precedence)}
C10L1/2227 (Urea) appears on 63 US grants and 43 published applications in this corpus.
Search patents in C10L- Granted patents
- 63
- Published applications
- 43
- Assignees
- 42
- Inventors
- 129
- Latest grant
- 25 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 3 |
| 2004 | 0 | 7 |
| 2005 | 3 | 2 |
| 2006 | 0 | 1 |
| 2007 | 3 | 1 |
| 2008 | 2 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 5 |
| 2012 | 2 | 2 |
| 2013 | 1 | 4 |
| 2014 | 1 | 1 |
| 2015 | 2 | 1 |
| 2016 | 2 | 2 |
| 2017 | 0 | 0 |
| 2018 | 0 | 3 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 2 |
| 2023 | 0 | 2 |
| 2024 | 2 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Additive for the combustion of solid fuels and production process of this additive25 Mar 2025US 12,258,529 B2National Key Laboratory For Petrochemical and Refinery Technologies
- Phase change materials to address reversion problems in heavy oils8 Oct 2024US 12,110,464 B2Baker Hughes Oilfield Operations LLC
- Method for reducing intake valve deposits27 Feb 2024US 11,912,949 B2Shell USA, Inc.
- Methods to reduce frequency of diesel particulate filter regeneration26 Apr 2022US 11,312,915 B2Afton Chemical Corporation
- Thermo-thickening compounds for non-polar liquid2 Nov 2021US 11,161,807 B2Centre National De La Recherche Scientifique
- Additive for the combustion of solid fuels and production process of this additive30 Nov 2023US 2023/0383207 A1National Key Laboratory For Petrochemical and Refinery Technologies
- Phase change materials to address reversion problems in heavy oils2 Nov 2023US 2023/0348806 A1Baker Hughes Oilfield Operations LLC
- Method for reducing intake valve deposits8 Dec 2022US 2022/0389339 A1Shell Oil Company
- Universal additive19 May 2022US 2022/0154090 A1
- Methods to reduce frequency of diesel particulate filter regeneration21 Jan 2021US 2021/0017464 A1Afton Chemical Corporation
Most cited
By later US patents
- Methods for reducing harmful emissions from a diesel engine61US 6,003,303 AClean Diesel Technologies, Inc. · 1999
- Anilines as markers for mineral oils59US 5,627,077 ABASF SE · 1997
- Reduction of nitrogen oxides emissions from diesel engines58US 5,535,708 APlatinum Plus, Inc. · 1996
- Operation of diesel engines with reduced particulate emission by utilization of platinum group metal fuel additive and pass-through catalytic oxidizer57US 5,501,714 APlatinum Plus, Inc. · 1996
- Method for reducing emissions of NO.sub.x and particulates from a diesel engine55US 6,051,040 AClean Diesel Technologies, Inc. · 2000