C07C 273/00
Preparation of urea or its derivatives, i.e. compounds containing any of the
Official title: Preparation of urea or its derivatives, i.e. compounds containing any of the groups [IMAGE cpc-sch-C07C-0967.gif] , the nitrogen atoms not being part of nitro or nitroso groups
C07C273/00 (Preparation of urea or its derivatives, i.e. compounds containing any of the) appears on 897 US grants and 634 published applications in this corpus.
Search patents in C07C- Granted patents
- 897
- Published applications
- 634
- Assignees
- 404
- Inventors
- 1,752
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 33 | 0 |
| 1977 | 26 | 0 |
| 1978 | 29 | 0 |
| 1979 | 16 | 0 |
| 1980 | 20 | 0 |
| 1981 | 20 | 0 |
| 1982 | 21 | 0 |
| 1983 | 13 | 0 |
| 1984 | 15 | 0 |
| 1985 | 16 | 0 |
| 1986 | 12 | 0 |
| 1987 | 20 | 0 |
| 1988 | 9 | 0 |
| 1989 | 16 | 0 |
| 1990 | 3 | 0 |
| 1991 | 12 | 0 |
| 1992 | 18 | 0 |
| 1993 | 12 | 0 |
| 1994 | 11 | 0 |
| 1995 | 10 | 0 |
| 1996 | 9 | 0 |
| 1997 | 10 | 0 |
| 1998 | 18 | 0 |
| 1999 | 12 | 0 |
| 2000 | 21 | 0 |
| 2001 | 15 | 5 |
| 2002 | 16 | 11 |
| 2003 | 10 | 8 |
| 2004 | 11 | 10 |
| 2005 | 10 | 15 |
| 2006 | 12 | 11 |
| 2007 | 2 | 10 |
| 2008 | 2 | 11 |
| 2009 | 11 | 20 |
| 2010 | 14 | 20 |
| 2011 | 9 | 20 |
| 2012 | 13 | 20 |
| 2013 | 14 | 13 |
| 2014 | 19 | 27 |
| 2015 | 23 | 27 |
| 2016 | 32 | 45 |
| 2017 | 30 | 36 |
| 2018 | 24 | 33 |
| 2019 | 44 | 44 |
| 2020 | 38 | 49 |
| 2021 | 33 | 36 |
| 2022 | 24 | 37 |
| 2023 | 20 | 35 |
| 2024 | 31 | 36 |
| 2025 | 28 | 28 |
| 2026 | 10 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Reactor for the synthesis of urea14 Jul 2026US 12,679,803 B2Casale SA
- Processes and systems for converting a hydrocarbon-containing feed7 Jul 2026US 12,674,106 B2ExxonMobil Chemical Patents Inc.
- Synthesis of prostate specific membrane antigen (PSMA) ligands30 Jun 2026US 12,668,569 B2Novartis AG
- Method to produce a urea ammonium sulphate-based composition23 Jun 2026US 12,662,448 B2Yara International Asa
- System and process for the production of UAN19 May 2026US 12,630,435 B2Stamicarbon B. V.
- Method for producing urea, apparatus for producing urea, and method for improving existing apparatus for producing urea10 Sep 2026US 2026/0265183 A1Toyo Engineering Corporation
- Duplex stainless steel and use thereof20 Aug 2026US 2026/0242913 A1Stamicarbon B. V.
- Urea synthesis apparatus, urea synthesis method, and method for improving existing urea synthesis apparatus13 Aug 2026US 2026/0234100 A1Toyo Engineering Corporation
- Memantyl urea derivative, preparation method thereof, and use thereof in preparation of drug for treating soluble epoxide hydrolase-mediated disease6 Aug 2026US 2026/0224548 A1Guangdong Hongshanhu Pharmaceutical Co., Ltd.
- Method for prilling urea and urea prilling apparatus30 Jul 2026US 2026/0216676 A1Toyo Engineering Corporation
Most cited
By later US patents
- Process for producing methanol292US 4,277,416 AAminoil, USA, Inc. · 1981
- Production process of N-substituted amide compounds141US 4,835,312 AMitsui Chemicals, Inc. · 1989
- Integrated process for converting hydrocarbon gas to liquids124US 6,248,794 B1Atlantic Richfield Company · 2001
- Phase transfer catalysis of heterogeneous reactions by quaternary salts123US 3,992,432 AContinental Oil Company · 1976
- Copper-catalyzed formation of carbon-heteroatom and carbon-carbon bonds78US 6,759,554 B2Massachusetts Institute of Technology · 2004