C07D 223/08
Oxygen atoms
C07D223/08 (Oxygen atoms) appears on 435 US grants and 336 published applications in this corpus.
Search patents in C07D- Granted patents
- 435
- Published applications
- 336
- Assignees
- 230
- Inventors
- 1,189
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 11 | 0 |
| 1980 | 10 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 8 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 10 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 9 | 0 |
| 1994 | 4 | 0 |
| 1995 | 8 | 0 |
| 1996 | 10 | 0 |
| 1997 | 14 | 0 |
| 1998 | 10 | 0 |
| 1999 | 13 | 0 |
| 2000 | 8 | 0 |
| 2001 | 8 | 1 |
| 2002 | 11 | 19 |
| 2003 | 15 | 12 |
| 2004 | 9 | 21 |
| 2005 | 10 | 15 |
| 2006 | 16 | 13 |
| 2007 | 7 | 10 |
| 2008 | 10 | 8 |
| 2009 | 7 | 16 |
| 2010 | 6 | 15 |
| 2011 | 8 | 10 |
| 2012 | 3 | 8 |
| 2013 | 11 | 21 |
| 2014 | 11 | 12 |
| 2015 | 16 | 18 |
| 2016 | 16 | 17 |
| 2017 | 19 | 20 |
| 2018 | 12 | 15 |
| 2019 | 15 | 15 |
| 2020 | 9 | 8 |
| 2021 | 8 | 12 |
| 2022 | 8 | 13 |
| 2023 | 4 | 6 |
| 2024 | 4 | 8 |
| 2025 | 9 | 17 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for producing epsilon-caprolactam by depolymerization of polycaprolactam (PA6)18 Aug 2026US 12,709,599 B2Aquafil S.P.A.
- Method for introducing deuterated lower alkyl into amine moiety of compound containing secondary amine19 May 2026US 12,630,487 B2Otsuka Pharmaceutical Co., Ltd.
- Inorganic solid silicon-based sulfonic acid and/or phosphoric acid catalyst, preparation method therefor, and application thereof24 Mar 2026US 12,582,970 B2Xiangtan University
- Selective depolymerisation of polyamide 6 to produce caprolactam from mixtures of caprolactam-containing polymers and polyurethane-containing polymers, in particular polyurethane block copolymers23 Dec 2025US 12,503,565 B2BASF SE
- Process and plant for the production of ε-Caprolactam and ammonium sulfate on industrial scale2 Dec 2025US 12,486,225 B2Cap III B. V.
- Method for purifying a crystalline substance1 Oct 2026US 2026/0297051 A1China Petroleum & Chemical Corporation
- Gba1 and gcs dual modulator20 Aug 2026US 2026/0242368 A1Ono Pharmaceutical Co., Ltd.
- Method for manufacturing cyclic lactam and device for manufacturing cyclic lactam13 Aug 2026US 2026/0234105 A1Mitsubishi Gas Chemical Company, Inc.
- Hierarchical porous all-silica molecular sieve and its preparation method and application25 Jun 2026US 2026/0175205 A1China Petroleum & Chemical Corporation
- Titanium silicalite molecular sieve with hierarchical porous structure and its preparation and application18 Jun 2026US 2026/0166536 A1China Petroleum & Chemical Corporation
Most cited
By later US patents
- Apparatus for manufacturing profile pipes used in well construction123US 5,119,661 A1992
- Arylsulfonamido-substituted hydroxamic acids110US 5,455,258 ACiba-Geigy Corporation · 1995
- Retroviral protease inhibiting compounds86US 5,914,332 AAbbott Laboratories · 1999
- Arylsulfonamido-substituted hydroxamic acids85US 5,552,419 ACiba-Geigy Corporation · 1996
- Arylsufonamido-substituted hydroxamic acids78US 5,506,242 ACiba-Geigy Corporation · 1996