C07C 273/189
Purification, separation, stabilisation, use of additives
Official title: {Purification, separation, stabilisation, use of additives}
C07C273/189 (Purification, separation, stabilisation, use of additives) appears on 32 US grants and 21 published applications in this corpus.
Search patents in C07C- Granted patents
- 32
- Published applications
- 21
- Assignees
- 22
- Inventors
- 90
- Latest grant
- 4 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 3 | 3 |
| 2013 | 0 | 0 |
| 2014 | 3 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 3 | 3 |
| 2021 | 0 | 2 |
| 2022 | 3 | 3 |
| 2023 | 0 | 2 |
| 2024 | 2 | 2 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of synthesis and purification of citrulline4 Mar 2025US 12,240,801 B2Asklepion Pharmaceuticals, LLC
- Process for producing biuret from urea9 Jul 2024US 12,030,837 B2Casale SA
- High pressure strippers for use in urea plants7 May 2024US 11,976,027 B2Yara International Asa
- Urea plant with stripper and stripping method17 May 2022US 11,331,593 B2Stamicarbon B. V.
- Organic reactions carried out in aqueous solution in the presence of a hydroxyalkyl(alkyl)cellulose or an alkylcellulose26 Apr 2022US 11,312,668 B2AbbVie Deutschland GmbH & Co. KG
- Process to produce a melt of urea and biuret and system to produce such a melt2 Jul 2026US 2026/0184674 A1Yara International Asa
- Improved method of synthesis and purification of citrulline5 Jun 2025US 2025/0179011 A1Asklepion Pharmaceuticals, LLC
- Method for producing isocyanate compound, method for producing carbamate compound, method for recovering amine compound, and isocyanate composition26 Dec 2024US 2024/0425448 A1Asahi Kasei Kabushiki Kaisha
- Continuous Methods for Forming Methylene Urea-Isobutylene Diurea Granules19 Dec 2024US 2024/0416305 A1Sabic Agri-Nutrients Company
- Process for producing biuret from urea12 Oct 2023US 2023/0322660 A1Casale SA
Most cited
By later US patents
- Particle size control for acetylenic agents useful in condition monitoring systems15US 7,019,171 B1Temptime Corporation · 2006
- Removal of water from a mixture of water, CO.sub.2 and amines9US 5,051,188 ABASF SE · 1991
- Quenching reagents for solution phase synthesis7US 6,121,488 AWarner-Lambert Company · 2000
- Rapid purification by polymer supported quench7US 6,306,959 B1Warner-Lambert Company · 2001
- Manufacture of symmetrical dialkylureas4US 4,178,309 ABASF SE · 1979