C07C 263/06
From or via ureas
Official title: from or via ureas
C07C263/06 (From or via ureas) appears on 23 US grants and 12 published applications in this corpus.
Search patents in C07C- Granted patents
- 23
- Published applications
- 12
- Assignees
- 15
- Inventors
- 58
- Latest grant
- 29 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 2 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 3 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 1 |
| 2018 | 2 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for preparing diisocyanates based on lysine29 Aug 2023US 11,739,055 B2Evonik Operations GmbH
- Reaction method accompanied by production of gas component6 Nov 2018US 10,118,110 B2Asahi Kasei Chemicals Corporation
- Carbodiimides, method for the production and use thereof4 Sep 2018US 10,065,925 B2LANXESS Deutschland GmbH
- Method for producing meta-xylylenediisocyanates6 Jun 2017US 9,670,148 B2Mitsui Chemicals, Inc.
- Process for the production of polyisocyanates28 Oct 2014US 8,871,969 B2BASF SE
- Process for preparing diisocyanates based on lysine30 Dec 2021US 2021/0403417 A1Evonik Operations GmbH
- Novel carbodiimides, method for the production and use thereof23 Nov 2017US 2017/0334839 A1LANXESS Deutschland GmbH
- Reaction Method Accompanied by Production of Gas Component16 Jun 2016US 2016/0166950 A1Asahi Kasei Chemicals Corporation
- Method for producing meta-xylylenediisocyanates26 May 2016US 2016/0145201 A1Mitsui Chemicals, Inc.
- Method for producing tolylene diisocyanate13 Mar 2014US 2014/0073811 A1Mitsui Chemicals, Inc.
Most cited
By later US patents
- Production of isocyanates from substituted ureas10US 3,936,484 AAtlantic Richfield Company · 1976
- Preparation of aliphatic isocyanates6US 4,354,979 ABASF SE · 1982
- Process for the preparation of aromatic mono- and polyisocyanates6US 4,871,871 AARCO Chemical Technology, L. P. · 1989
- Process for the preparation of methylene diphenylene diisocyanates and polymethylene polyphenylene poly (diisocyanates)6US 4,873,364 AARCO Chemical Technology, L. P. · 1989
- Process for the preparation of aromatic isocyanates from dialkyl ureas using an organic sulfonic acid promoter6US 4,883,908 AARCO Chemical Technology, L. P. · 1989