C08G 18/20
Heterocyclic amines
Official title: Heterocyclic amines; Salts thereof
C08G18/20 (Heterocyclic amines) appears on 759 US grants and 916 published applications in this corpus.
Search patents in C08G- Granted patents
- 759
- Published applications
- 916
- Assignees
- 407
- Inventors
- 2,348
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 11 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 8 | 0 |
| 1983 | 6 | 0 |
| 1984 | 11 | 0 |
| 1985 | 8 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 14 | 0 |
| 1989 | 9 | 0 |
| 1990 | 11 | 0 |
| 1991 | 13 | 0 |
| 1992 | 18 | 0 |
| 1993 | 21 | 0 |
| 1994 | 12 | 0 |
| 1995 | 14 | 0 |
| 1996 | 14 | 0 |
| 1997 | 11 | 0 |
| 1998 | 9 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 0 |
| 2002 | 3 | 8 |
| 2003 | 8 | 13 |
| 2004 | 9 | 12 |
| 2005 | 5 | 9 |
| 2006 | 7 | 6 |
| 2007 | 0 | 15 |
| 2008 | 1 | 5 |
| 2009 | 2 | 5 |
| 2010 | 4 | 12 |
| 2011 | 1 | 14 |
| 2012 | 2 | 16 |
| 2013 | 7 | 13 |
| 2014 | 12 | 22 |
| 2015 | 17 | 34 |
| 2016 | 25 | 39 |
| 2017 | 21 | 49 |
| 2018 | 30 | 60 |
| 2019 | 38 | 70 |
| 2020 | 45 | 70 |
| 2021 | 60 | 100 |
| 2022 | 36 | 103 |
| 2023 | 53 | 74 |
| 2024 | 51 | 73 |
| 2025 | 47 | 49 |
| 2026 | 21 | 45 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Polyol premixes, thermally insulating rigid polyurethane foams and methods for their production22 Sep 2026US 12,742,034 B2Covestro LLC
- Liquid moisture curable polyurethane with improved adhesion to aluminum11 Aug 2026US 12,703,808 B2Henkel AG & Co. KGaA
- Additive for reducing polyurethane foam degradation14 Jul 2026US 12,679,943 B2Huntsman International LLC
- Two-part interface materials, systems including the interface material, and methods thereof16 Jun 2026US 12,655,243 B2Ddp Specialty Electronic Materials US, LLC
- Two component coating compositions16 Jun 2026US 12,655,247 B2PPG Industries Ohio, Inc.
- Polyisocyanates with improved properties3 Sep 2026US 2026/0258190 A1Covestro Deutschland AG
- Prepolymer composition, polyurethane resin, elastic molded article, and method for producing prepolymer composition20 Aug 2026US 2026/0242528 A1Mitsui Chemicals, Inc.
- Liquid, One Component, Moisture Curable Polyurethane for Bonding Untreated Metals20 Aug 2026US 2026/0242645 A1Henkel AG & Co. KGaA
- Two-component polyurethane adhesive with durable adhesion to inorganic substrates13 Aug 2026US 2026/0234453 A1Ddp Specialty Electronic Materials US, LLC
- Acid-blocked pyrrolidine catalysts for polyurethane foam30 Jul 2026US 2026/0217893 A1Huntsman Petrochemical Corporation
Most cited
By later US patents
- At least partially resorbable reticulated elastomeric matrix elements and methods of making same952US 9,050,176 B2Biomerix Corporation · 2015
- 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
- Polyurethane casting material108US 4,433,680 AJohnson & Johnson Products, Inc. · 1984
- Metabolically acceptable polyisocyanate adhesives96US 4,829,099 ABioResearch Inc. · 1989