C07D 311/92
Naphthopyrans
Official title: Naphthopyrans; Hydrogenated naphthopyrans
C07D311/92 (Naphthopyrans) appears on 407 US grants and 239 published applications in this corpus.
Search patents in C07D- Granted patents
- 407
- Published applications
- 239
- Assignees
- 201
- Inventors
- 864
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 12 | 0 |
| 1978 | 3 | 0 |
| 1979 | 6 | 0 |
| 1980 | 7 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 10 | 0 |
| 1988 | 5 | 0 |
| 1989 | 10 | 0 |
| 1990 | 9 | 0 |
| 1991 | 8 | 0 |
| 1992 | 12 | 0 |
| 1993 | 21 | 0 |
| 1994 | 10 | 0 |
| 1995 | 9 | 0 |
| 1996 | 18 | 0 |
| 1997 | 19 | 0 |
| 1998 | 17 | 0 |
| 1999 | 17 | 0 |
| 2000 | 13 | 0 |
| 2001 | 15 | 5 |
| 2002 | 15 | 11 |
| 2003 | 13 | 13 |
| 2004 | 7 | 15 |
| 2005 | 8 | 12 |
| 2006 | 3 | 11 |
| 2007 | 12 | 10 |
| 2008 | 4 | 5 |
| 2009 | 5 | 10 |
| 2010 | 8 | 9 |
| 2011 | 2 | 15 |
| 2012 | 9 | 15 |
| 2013 | 13 | 8 |
| 2014 | 7 | 13 |
| 2015 | 8 | 6 |
| 2016 | 7 | 8 |
| 2017 | 7 | 8 |
| 2018 | 5 | 8 |
| 2019 | 7 | 4 |
| 2020 | 4 | 10 |
| 2021 | 5 | 8 |
| 2022 | 5 | 5 |
| 2023 | 4 | 8 |
| 2024 | 2 | 6 |
| 2025 | 2 | 12 |
| 2026 | 7 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ring closure of benzoquinones containing an unsaturated side chain using a basic catalyst8 Sep 2026US 12,729,188 B2Dsm IP Assets B.V.
- Quinone protected forms and conjugates4 Aug 2026US 12,697,392 B2Cambridge Enterprise Limited
- Photochromic compound, naphthol derivative, curable composition, optical article, lens, and eyeglasses7 Apr 2026US 12,595,408 B2Tokuyama Corporation
- Photoinitiators, photohardenable compositions, and methods for forming an object in a volume17 Feb 2026US 12,552,761 B2Quadratic 3D, Inc.
- Compound as PPAR agonist and application thereof10 Feb 2026US 12,545,653 B2USA Elixiria Biotech Inc.
- Photochromic compound, naphthol derivative, curable composition, optical article, lens, and eyeglass1 Oct 2026US 2026/0297421 A1Tokuyama Corporation
- Novel compound, organic electroluminescence device using the same, and electronic apparatus12 Mar 2026US 2026/0071120 A1Idemitsu Kosan Co., Ltd.
- Photochromic compound, photochromic composition, photochromic article and eyeglasses12 Feb 2026US 2026/0042742 A1Hoya Lens Thailand Ltd.
- Organic electroluminescence element, electronic device, composition, and mixture powder15 Jan 2026US 2026/0020491 A1Idemitsu Kosan Co., Ltd.
- Squalene hopene cyclase (shc) variants27 Nov 2025US 2025/0361536 A1Givaudan SA
Most cited
By later US patents
- Recombinant production of novel polyketides221US 5,672,491 ALeland Stanford Junior University · 1997
- Photochromic naphthopyran compounds213US 5,274,132 ATransitions Optical, Inc. · 1993
- Photochromic naphthopyran compounds191US 5,066,818 APPG Industries, Inc. · 1991
- Polymerizable polyalkoxylated naphthopyrans186US 6,113,814 ATransitions Optical, Inc. · 2000
- Photochromic substituted naphthopyran compounds177US 5,466,398 ATransitions Optical, Inc. · 1995