C07C 273/18
Preparation of urea or its derivatives, i.e. compounds containing any of the
Official title: of substituted ureas
C07C273/18 (Preparation of urea or its derivatives, i.e. compounds containing any of the) appears on 395 US grants and 196 published applications in this corpus.
Search patents in C07C- Granted patents
- 395
- Published applications
- 196
- Assignees
- 246
- Inventors
- 1,036
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 13 | 0 |
| 1978 | 15 | 0 |
| 1979 | 11 | 0 |
| 1980 | 11 | 0 |
| 1981 | 12 | 0 |
| 1982 | 11 | 0 |
| 1983 | 12 | 0 |
| 1984 | 11 | 0 |
| 1985 | 8 | 0 |
| 1986 | 6 | 0 |
| 1987 | 13 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 2 | 0 |
| 1991 | 10 | 0 |
| 1992 | 17 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 6 | 0 |
| 2000 | 11 | 0 |
| 2001 | 2 | 1 |
| 2002 | 7 | 2 |
| 2003 | 3 | 3 |
| 2004 | 4 | 4 |
| 2005 | 3 | 10 |
| 2006 | 8 | 6 |
| 2007 | 0 | 5 |
| 2008 | 0 | 2 |
| 2009 | 3 | 9 |
| 2010 | 5 | 9 |
| 2011 | 5 | 10 |
| 2012 | 4 | 7 |
| 2013 | 8 | 5 |
| 2014 | 11 | 8 |
| 2015 | 7 | 6 |
| 2016 | 13 | 16 |
| 2017 | 7 | 7 |
| 2018 | 9 | 7 |
| 2019 | 8 | 11 |
| 2020 | 9 | 16 |
| 2021 | 7 | 10 |
| 2022 | 9 | 11 |
| 2023 | 6 | 13 |
| 2024 | 8 | 8 |
| 2025 | 7 | 2 |
| 2026 | 2 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Synthesis of prostate specific membrane antigen (PSMA) ligands30 Jun 2026US 12,668,569 B2Novartis AG
- Carbamate production method, carbamate ester production method, and urea derivative production method12 May 2026US 12,623,999 B2National Institute of Advanced Industrial Science and Technology
- Process for preparing 5-(fluoro-4-imino-3-methyl)-1-tosyl-3,4 dihydropyrimidine-(1H)-one and derivatives of the compound11 Nov 2025US 12,466,796 B2Adama Makhteshim Ltd.
- Processes for the preparation of (S)-tert-butyl 4,5-diamino-5-oxopentanoate7 Oct 2025US 12,435,028 B2Celgene Corporation
- Method for producing halogenated carbonyl23 Sep 2025US 12,421,121 B2Mitsubishi Gas Chemical Company, Inc.
- 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.
- Process for the preparation of sulfonylurea based compounds23 Jul 2026US 2026/0209174 A1Zydus Lifesciences Limited
- Phenoxycarbamoyl chloride compound and method for producing same16 Jul 2026US 2026/0200839 A1Nippon Soda Co., Ltd.
- Process to produce a melt of urea and biuret and system to produce such a melt2 Jul 2026US 2026/0184674 A1Yara International Asa
- Method for producing blocked isocyanate compound and method for producing isocyanate compound11 Jun 2026US 2026/0159476 A1Asahi Kasei Kabushiki Kaisha
Most cited
By later US patents
- Production process of N-substituted amide compounds141US 4,835,312 AMitsui Chemicals, Inc. · 1989
- 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
- Process for the partial carbodiimidization of organic isocyanates76US 4,088,665 ABayer Aktiengesellschaft · 1978
- Process for the preparation of allophanates which contain isocyanate groups72US 4,160,080 ABayer Aktiengesellschaft · 1979