C08G 18/4638
Containing heterocyclic rings having at least one nitrogen atom in the ring
Official title: {containing heterocyclic rings having at least one nitrogen atom in the ring}
C08G18/4638 (Containing heterocyclic rings having at least one nitrogen atom in the ring) appears on 41 US grants and 35 published applications in this corpus.
Search patents in C08G- Granted patents
- 41
- Published applications
- 35
- Assignees
- 34
- Inventors
- 123
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 1 | 4 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 2 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 2 | 2 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 2 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 5 |
| 2023 | 0 | 4 |
| 2024 | 1 | 3 |
| 2025 | 3 | 2 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Imide-containing polyester polyols and intumescent rigid foams26 May 2026US 12,637,534 B2Stepan Company
- Polycarbonate polyol composition12 May 2026US 12,624,151 B2Asahi Kasei Kabushiki Kaisha
- Composition and cured product thereof20 Jan 2026US 12,528,970 B2Daicel Corporation
- Water-based compositions13 May 2025US 12,297,315 B2Arkema France
- Polyurethane foam composition comprising an aromatic polyester polyol compound and products made therefrom18 Mar 2025US 12,252,578 B2Huntsman International LLC
- Imide-containing polyols, methods for making imide-containing polyols and methods for using imide-containing polyols9 Apr 2026US 2026/0098120 A1Dow Global Technologies LLC
- Imide-containing polyester polyols and intumescent rigid foams5 Feb 2026US 2026/0035505 A1Stepan Company
- Imide-containing polyols, method for making imide-containing polyols and method for using the imide polyols6 Feb 2025US 2025/0043058 A1Dow Global Technologies LLC
- Process for preparing polyoxyalkylene polyester polyols16 Jan 2025US 2025/0019486 A1Covestro Deutschland AG
- Polyester polymer19 Sep 2024US 2024/0309150 A1PPG Industries Ohio, Inc.
Most cited
By later US patents
- UV curable high tensile strength resin composition15US 4,618,632 AWestinghouse Electric Corp. · 1986
- Cross-linkable compounds14US 4,032,565 AI.W.S. Nominee Company Limited · 1977
- Articles coated with a cured composition of hydroxy(polyalkylenecarbonyloxy)alkyleneoxazolidine and a polyisocyanate13US 4,032,686 ARohm and Haas Company · 1977
- Modified polyurethanes with increased light stability13US 4,102,870 ACiba-Geigy Corporation · 1978
- Hydrocurable compositions of hydroxy(polyalkylenecarbonyloxy)-alkyleneoxazolidine and an isocyanate12US 4,024,117 ARohm and Haas Company · 1977