C07D 323/04
Six-membered rings
C07D323/04 (Six-membered rings) appears on 93 US grants and 65 published applications in this corpus.
Search patents in C07D- Granted patents
- 93
- Published applications
- 65
- Assignees
- 52
- Inventors
- 227
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 2 |
| 2002 | 5 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 4 |
| 2005 | 1 | 3 |
| 2006 | 2 | 3 |
| 2007 | 3 | 6 |
| 2008 | 0 | 5 |
| 2009 | 3 | 2 |
| 2010 | 1 | 9 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 5 | 4 |
| 2014 | 1 | 7 |
| 2015 | 2 | 0 |
| 2016 | 4 | 4 |
| 2017 | 4 | 1 |
| 2018 | 2 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 2 |
| 2024 | 0 | 2 |
| 2025 | 0 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process and device for preparing trioxane from methanol7 Apr 2026US 12,595,242 B2Chengdu Organic Chemicals Co., Ltd. Chinese Academy of Sciences
- Energy recovery in a method for preparing 1,3,5-trioxane24 Aug 2021US 11,097,202 B2BASF SE
- Process for producing a cyclic acetal in a heterogeneous reaction system10 Nov 2020US 10,829,467 B2Celanese Sales Germany GmbH
- Trioxane composition and method for storing same12 Mar 2019US 10,227,448 B2Mitsubishi Gas Chemical Company, Inc.
- Method for preparing trioxane12 Jun 2018US 9,994,544 B2Arkema France
- Method for purifying a crystalline substance1 Oct 2026US 2026/0297051 A1China Petroleum & Chemical Corporation
- Use of Biomass to Produce Polyoxymethylene Copolymers13 Aug 2026US 2026/0234317 A1Celanese International Corporation
- Composition, and method for producing trioxane using same2 Oct 2025US 2025/0304548 A1Mitsubishi Gas Chemical Company, Inc.
- Method for preparing trioxane derivatives14 Aug 2025US 2025/0257047 A1Evonik Oxeno GmbH
- Drug delivery systems based on endoperoxides useful in diagnosis and therapy, and methods thereof27 Feb 2025US 2025/0064840 A1Faculdade De Farmacia Da Universidade De Lisboa
Most cited
By later US patents
- Process for removing methanol from formaldehyde-containing solutions19US 7,301,055 B2Ticona LLC · 2007
- Method of purifying polymerizable organic substances14US 3,969,344 ASocieta' Italiana Resine S.p.A. · 1976
- Sublimable aromatic compositions13US 4,045,551 AOgawa & Co., Ltd. · 1977
- 1,2,4-trioxane compounds having antimalarial activity11US 5,225,437 AThe Johns Hopkins University · 1993
- Process for the preparation of trioxane10US 5,508,448 AHoechst Aktiengesellschaft · 1996