G03C 1/685
Compositions containing spiro-condensed pyran compounds or derivatives thereof, as photosensitive substances
G03C1/685 (Compositions containing spiro-condensed pyran compounds or derivatives thereof, as photosensitive substances) appears on 161 US grants and 58 published applications in this corpus.
Search patents in G03C- Granted patents
- 161
- Published applications
- 58
- Assignees
- 64
- Inventors
- 255
- Latest grant
- 10 May 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 11 | 0 |
| 1994 | 4 | 0 |
| 1995 | 9 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 1 | 1 |
| 2002 | 5 | 2 |
| 2003 | 1 | 7 |
| 2004 | 3 | 2 |
| 2005 | 1 | 6 |
| 2006 | 1 | 5 |
| 2007 | 6 | 3 |
| 2008 | 1 | 3 |
| 2009 | 4 | 4 |
| 2010 | 4 | 4 |
| 2011 | 2 | 1 |
| 2012 | 3 | 6 |
| 2013 | 1 | 1 |
| 2014 | 3 | 2 |
| 2015 | 3 | 1 |
| 2016 | 2 | 4 |
| 2017 | 1 | 0 |
| 2018 | 4 | 3 |
| 2019 | 1 | 2 |
| 2020 | 2 | 0 |
| 2021 | 1 | 1 |
| 2022 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Composition for the manufacture of an ophthalmic lens comprising an encapsulated light-absorbing additive10 May 2022US 11,327,202 B2Essilor International
- Polymerizable composition for optical material and molded product15 Feb 2022US 11,248,077 B2Mitsui Chemicals, Inc.
- Ophthalmic lens comprising an encapsulated light-absorbing additive21 Dec 2021US 11,204,445 B2Essilor International
- Photochromic compounds14 Jan 2020US 10,532,997 B2Transitions Optical, Inc.
- Photochromic compounds14 Jan 2020US 10,532,998 B2Transitions Optical, Inc.
- Polymerizable composition for optical material and molded product25 Feb 2021US 2021/0054126 A1Mitsui Chemicals, Inc.
- Ophthalmic Lens Comprising an Encapsulated Light-Absorbing Additive11 Jul 2019US 2019/0212473 A1Essilor International
- Composition for the Manufacture of an Ophthalmic Lens Comprising an Encapsulated Light-Absorbing Additive6 Jun 2019US 2019/0169438 A1Essilor International
- Photochromic Compounds11 Oct 2018US 2018/0291007 A1Transitions Optical, Inc.
- Photochromic Compounds11 Oct 2018US 2018/0291008 A1Transitions Optical, Inc.
Most cited
By later US patents
- Photochromic naphthopyran compounds191US 5,066,818 APPG Industries, Inc. · 1991
- Photochromic compound and articles containing the same178US 4,637,698 APPG Industries, Inc. · 1987
- Photochromic composition resistant to fatigue169US 4,720,356 AAmerican Optical Corporation · 1988
- Photochromic plastic article and method for preparing same155US 4,880,667 APPG Industries, Inc. · 1989
- Stabilized photochromic materials137US 4,166,043 AAmerican Optical Corporation · 1979