C07C 263/04
From or via carbamates or carbamoyl halides
Official title: from or via carbamates or carbamoyl halides
C07C263/04 (From or via carbamates or carbamoyl halides) appears on 157 US grants and 95 published applications in this corpus.
Search patents in C07C- Granted patents
- 157
- Published applications
- 95
- Assignees
- 76
- Inventors
- 349
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 7 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 3 |
| 2004 | 1 | 1 |
| 2005 | 1 | 5 |
| 2006 | 2 | 1 |
| 2007 | 3 | 1 |
| 2008 | 3 | 2 |
| 2009 | 2 | 3 |
| 2010 | 0 | 8 |
| 2011 | 4 | 10 |
| 2012 | 2 | 8 |
| 2013 | 3 | 7 |
| 2014 | 14 | 4 |
| 2015 | 11 | 4 |
| 2016 | 7 | 5 |
| 2017 | 5 | 2 |
| 2018 | 2 | 4 |
| 2019 | 2 | 0 |
| 2020 | 3 | 8 |
| 2021 | 4 | 5 |
| 2022 | 4 | 3 |
| 2023 | 3 | 5 |
| 2024 | 1 | 3 |
| 2025 | 1 | 0 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for producing 1, 5-pentamethylene diisocyanate from cadaverine salt11 Aug 2026US 12,703,678 B2Mojia Biotech Ltd.
- Process for the decomposition of polyurethane31 Mar 2026US 12,590,198 B2Neveon Germany GMBH
- Method for the synthesis of isocyanates24 Feb 2026US 12,559,452 B2CYNIO GmbH
- Synthetic methods of preparing esketamine25 Feb 2025US 12,234,200 B2Janssen Pharmaceutica NV
- Organic amine collection method31 Dec 2024US 12,180,136 B2Asahi Kasel Kabushiki Kaisha
- Preparation method of dual-anion catalyst, and use of dual-anion catalyst in catalytic degradation of polyurethane material7 May 2026US 2026/0124609 A1Zhejiang University of Technology
- 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
- Process for the decomposition of polyurethane12 Sep 2024US 2024/0301161 A1Neveon Germany GMBH
- Two-stage chemical recycling of polyurethanes5 Sep 2024US 2024/0294728 A1Universiteit Antwerpen
- Improved process for producing 1, 5-pentamethylene diisocyanate from cadaverine salt28 Dec 2023US 2023/0416194 A1Mojia Biotech Ltd.
Most cited
By later US patents
- Circulation process for the production of aliphatic and cycloaliphatic diisocyanates76US 5,087,739 AHuels Aktiengesellschaft · 1992
- Multiple-step process for the preparation of hexamethylene diisocyanate-1,6 and/or isomeric aliphatic diisocyanates with six carbon atoms in the alkylene residue70US 4,596,678 ABASF SE · 1986
- Process for preparation of aromatic isocyanates49US 4,081,472 AMitsui Toatsu Chemicals, Inc. · 1978
- Production of isocyanates from esters of carbamic acids (urethanes)38US 3,962,302 AAtlantic Richfield Company · 1976
- Process for the preparation of polyisocyanates33US 4,388,246 ABayer Aktiengesellschaft · 1983