C07C 273/1809
With formation of the n-c-n moiety
Official title: {with formation of the N-C(O)-N moiety}
C07C273/1809 (With formation of the n-c-n moiety) appears on 221 US grants and 95 published applications in this corpus.
Search patents in C07C- Granted patents
- 221
- Published applications
- 95
- Assignees
- 153
- Inventors
- 586
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 7 | 0 |
| 1978 | 10 | 0 |
| 1979 | 7 | 0 |
| 1980 | 7 | 0 |
| 1981 | 7 | 0 |
| 1982 | 6 | 0 |
| 1983 | 9 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 10 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 1 | 1 |
| 2002 | 5 | 1 |
| 2003 | 2 | 1 |
| 2004 | 2 | 2 |
| 2005 | 1 | 4 |
| 2006 | 5 | 3 |
| 2007 | 0 | 4 |
| 2008 | 0 | 2 |
| 2009 | 1 | 2 |
| 2010 | 0 | 6 |
| 2011 | 4 | 3 |
| 2012 | 1 | 2 |
| 2013 | 3 | 2 |
| 2014 | 3 | 2 |
| 2015 | 2 | 1 |
| 2016 | 6 | 7 |
| 2017 | 2 | 3 |
| 2018 | 4 | 3 |
| 2019 | 4 | 8 |
| 2020 | 4 | 10 |
| 2021 | 6 | 4 |
| 2022 | 3 | 7 |
| 2023 | 3 | 8 |
| 2024 | 4 | 3 |
| 2025 | 5 | 1 |
| 2026 | 2 | 5 |
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
- 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.
- One pot synthesis of urea (meth)acrylates24 Jun 2025US 12,338,202 B2Evonik Operations GmbH
- 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.
- Phenoxycarbamoyl chloride compound and method for producing same16 Jul 2026US 2026/0200839 A1Nippon Soda Co., Ltd.
- Method for producing blocked isocyanate compound and method for producing isocyanate compound11 Jun 2026US 2026/0159476 A1Asahi Kasei Kabushiki Kaisha
- Urea-based ice recrystallization inhibitor compounds and compositions, and uses thereof for cryopreservation28 May 2026US 2026/0146238 A1PanTHERA CryoSolutions Inc.
- Method for self-catalytic directional degradation of polyurethane material, polyol prepared thereof and polyurethane material14 May 2026US 2026/0132267 A1Swancor Innovation & Incubation Co., Ltd.
Most cited
By later US patents
- Phase transfer catalysis of heterogeneous reactions by quaternary salts123US 3,992,432 AContinental Oil Company · 1976
- Process for the preparation of allophanates which contain isocyanate groups72US 4,160,080 ABayer Aktiengesellschaft · 1979
- Process for the production of polyisocyanates with biuret structures67US 4,837,359 ABayer Aktiengesellschaft · 1989
- Process for the production of polyisocyanates containing allophanate groups56US 4,810,820 AMobay Corporation · 1989
- Stainproofing agent and process for its preparation49US 4,504,401 AAsahi Glass Company, Limited · 1985