C07C 273/1836
From derivatives of carbamic acid
Official title: {from derivatives of carbamic acid}
C07C273/1836 (From derivatives of carbamic acid) appears on 40 US grants and 17 published applications in this corpus.
Search patents in C07C- Granted patents
- 40
- Published applications
- 17
- Assignees
- 29
- Inventors
- 105
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 3 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 2 |
| 2019 | 2 | 3 |
| 2020 | 2 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Preparation method of supercritical carbon dioxide thickener for tight oil and gas reservoir1 Mar 2022US 11,261,373 B2Southwest Petroleum University
- Process to prepare higher ethylene amines and ethylene amine derivatives24 Nov 2020US 10,844,001 B2Nouryon Chemicals International B. V.
- Synthesis of carbamate or urea compounds24 Mar 2020US 10,597,358 B2Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Safe and efficient process for the preparation of carmustine31 Dec 2019US 10,519,104 B2NerPharMa S.r.l.
- Carbamate production method, carbamate ester production method, and urea derivative production method6 Jul 2023US 2023/0212110 A1National Institute of Advanced Industrial Science and Technology
- Preparation Method of Supercritical Carbon Dioxide Thickener for Tight Oil and Gas Reservoir10 Dec 2020US 2020/0385631 A1Southwest Petroleum University
- Method of converting carbon dioxide into carbonyl compounds19 Sep 2019US 2019/0284171 A1
- Process to prepare higher ethylene amines and ethylene amine derivatives7 Feb 2019US 2019/0039993 A1Akzo Nobel Chemicals International B.V.
- Process to prepare higher ethylene amines and ethylene amine derivatives31 Jan 2019US 2019/0031597 A1Akzo Nobel Chemicals International B.V.
Most cited
By later US patents
- Process for the preparation of N-aryl-N'-(mono- or di substituted)-urea derivatives38US 4,410,697 AReanal Finomvegyszergyar · 1983
- Process for the preparation of polyisocyanates containing allophanate groups31US 4,177,342 ABayer Aktiengesellschaft · 1979
- Method preparing amino acid-derived diaminopropanols29US 5,475,138 APharm-Eco Laboratories, Inc. · 1995
- Process for the production of light-stable polyisocyanates containing allophanate groups29US 6,392,001 B1Bayer Aktiengesellschaft · 2002
- Light-sensitive silver halide color photographic material27US 4,609,619 AKonishiroku Photo Industry Co., Ltd. · 1986