C07D 251/26
With only hetero atoms directly attached to ring carbon atoms
Official title: with only hetero atoms directly attached to ring carbon atoms
C07D251/26 (With only hetero atoms directly attached to ring carbon atoms) appears on 1,947 US grants and 1,130 published applications in this corpus.
Search patents in C07D- Granted patents
- 1,947
- Published applications
- 1,130
- Assignees
- 741
- Inventors
- 4,190
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 35 | 0 |
| 1977 | 45 | 0 |
| 1978 | 51 | 0 |
| 1979 | 37 | 0 |
| 1980 | 52 | 0 |
| 1981 | 70 | 0 |
| 1982 | 38 | 0 |
| 1983 | 41 | 0 |
| 1984 | 45 | 0 |
| 1985 | 35 | 0 |
| 1986 | 35 | 0 |
| 1987 | 41 | 0 |
| 1988 | 29 | 0 |
| 1989 | 42 | 0 |
| 1990 | 43 | 0 |
| 1991 | 35 | 0 |
| 1992 | 47 | 0 |
| 1993 | 55 | 0 |
| 1994 | 39 | 0 |
| 1995 | 40 | 0 |
| 1996 | 35 | 0 |
| 1997 | 37 | 0 |
| 1998 | 45 | 0 |
| 1999 | 29 | 0 |
| 2000 | 44 | 0 |
| 2001 | 54 | 10 |
| 2002 | 50 | 42 |
| 2003 | 38 | 63 |
| 2004 | 46 | 59 |
| 2005 | 32 | 46 |
| 2006 | 31 | 46 |
| 2007 | 35 | 49 |
| 2008 | 31 | 43 |
| 2009 | 24 | 49 |
| 2010 | 22 | 44 |
| 2011 | 38 | 42 |
| 2012 | 27 | 54 |
| 2013 | 39 | 55 |
| 2014 | 49 | 56 |
| 2015 | 48 | 49 |
| 2016 | 46 | 50 |
| 2017 | 48 | 49 |
| 2018 | 40 | 34 |
| 2019 | 35 | 35 |
| 2020 | 25 | 41 |
| 2021 | 27 | 39 |
| 2022 | 23 | 27 |
| 2023 | 19 | 50 |
| 2024 | 20 | 38 |
| 2025 | 38 | 38 |
| 2026 | 17 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Triazine silane compound and its usage as adhesion promotor6 Oct 2026US 12,753,194 B2Atotech Deutschland GmbH
- Compound, method for preparing same, and single molecule, oligomer and polymer derived from same29 Sep 2026US 12,747,216 B2LG Chem.Ltd.
- Poly (melamine-co-oxalyl), methods of synthesizing and using same and articles treated with same18 Aug 2026US 12,709,661 B2State of Israel Prime Minister's Office Israel Institute for Biological Research
- Ionizable lipid compounds and lipid nanoparticle compositions16 Jun 2026US 12,655,114 B2SunVax mRNA Therapeutics Inc.
- Gas generant compositions comprising melamine oxalate for use in automotive restraint devices9 Jun 2026US 12,649,701 B2Autoliv ASP, Inc.
- Process for the synthesis of melamine with an optimized dissolution and ammonolysis step8 Oct 2026US 2026/0308133 A1Eurotecnica Contractors & Engineers S.p.A.
- Process for the production of high-purity melamine from the pyrolysis of urea, with optimization of the deammoniation step of the mother liquors8 Oct 2026US 2026/0308134 A1Eurotecnica Contractors & Engineers S.p.A.
- Melamine process with urea melt-based washing of melamine offgas1 Oct 2026US 2026/0297039 A1Casale SA
- Novel tag for liquid-phase peptide synthesis17 Sep 2026US 2026/0274806 A1Cordenpharma International
- Nonaqueous electrolyte solution, nonaqueous electrolyte solution battery, and compound27 Aug 2026US 2026/0253953 A1Central Glass Company, Limited
Most cited
By later US patents
- Novel polytriazine compounds135US 4,086,204 AChimosa Chimica Organica S.p.A. · 1978
- Herbicidal sulfonamides124US 4,127,405 AE. I. Du Pont de Nemours and Company · 1978
- Process for the preparation of polyisocyanates containing isocyanurate groups and the use thereof112US 4,324,879 ABayer Aktiengesellschaft · 1982
- Herbicidal sulfonamides102US 4,169,719 AE. I. Du Pont de Nemours and Company · 1979
- Isocyanate trimers containing iminooxadiazine dione groups, their preparation and use99US 5,914,383 ABayer Aktiengesellschaft · 1999