C08G 18/2036
Having at least three nitrogen atoms in the ring
Official title: {having at least three nitrogen atoms in the ring}
C08G18/2036 (Having at least three nitrogen atoms in the ring) appears on 88 US grants and 82 published applications in this corpus.
Search patents in C08G- Granted patents
- 88
- Published applications
- 82
- Assignees
- 46
- Inventors
- 244
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 3 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 3 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 2 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 4 |
| 2017 | 1 | 4 |
| 2018 | 3 | 5 |
| 2019 | 2 | 12 |
| 2020 | 5 | 2 |
| 2021 | 6 | 15 |
| 2022 | 7 | 6 |
| 2023 | 2 | 6 |
| 2024 | 7 | 7 |
| 2025 | 2 | 2 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Polyol premixes, thermally insulating rigid polyurethane foams and methods for their production22 Sep 2026US 12,742,034 B2Covestro LLC
- Method for improving the flame, smoke and/or toxicity retardancy in polyisocyanurate / polyurethane (PIR/PUR) comprising materials4 Nov 2025US 12,460,041 B2Huntsman International LLC
- Expanded foam solution and thermosetting expanded foam having excellent flame retardancy using the same25 Mar 2025US 12,258,434 B2Kyung Dong One Corporation
- Production of polyurethane systems29 Oct 2024US 12,129,329 B2Evonik Operations GmbH
- Hybrid foam formulations8 Oct 2024US 12,110,361 B2Dow Global Technologies LLC
- Polyurethane foam-forming reaction mixtures, polyurethane foams formed therefrom, and methods for their production and use16 Jul 2026US 2026/0201107 A1Covestro LLC
- Low-odor phosphazene catalyst and use thereof30 Apr 2026US 2026/0115705 A1Changhua Chemical Technology Co., Ltd.
- A process for producing one or more polymers selected from the group consisting of polyurethanes, polyurethane ureas, polyisocyanurates, and a mixture of two or more thereof, from a solid material w1 Jan 2026US 2026/0001990 A1BASF SE
- Method of fast curing a polythiourethane based substrate using a delayed-action catalyst2 Oct 2025US 2025/0304740 A1Essilor International
- Modified arylhydroxy compounds for the production of polyurethane or polyisocyanurate2 Jan 2025US 2025/0002635 A1Bakelite AG
Most cited
By later US patents
- Synthesis of polysaccharide covered superparamagnetic oxide colloids143US 5,262,176 AAdvanced Magnetics, Inc. · 1993
- Biologically degradable superparamagnetic particles for use as nuclear magnetic resonance imaging agents136US 4,770,183 AAdvanced Magnetics, Inc. · 1988
- Biologically degradable superparamagnetic materials for use in clinical applications95US 4,827,945 AAdvanced Magnetics, Inc. · 1989
- Vascular magnetic imaging method and agent comprising biodegradeable superparamagnetic metal oxides64US 5,055,288 AAdvanced Magnetics, Inc. · 1991
- Vascular magnetic resonance imaging agent comprising nanoparticles54US 5,314,679 AAdvanced Magnetics, Inc. · 1994