C09D 11/16
Writing inks
C09D11/16 (Writing inks) appears on 827 US grants and 625 published applications in this corpus.
Search patents in C09D- Granted patents
- 827
- Published applications
- 625
- Assignees
- 247
- Inventors
- 1,275
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 6 | 0 |
| 1979 | 6 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 13 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 14 | 0 |
| 1989 | 6 | 0 |
| 1990 | 14 | 0 |
| 1991 | 16 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 22 | 0 |
| 1995 | 11 | 0 |
| 1996 | 20 | 0 |
| 1997 | 30 | 0 |
| 1998 | 29 | 0 |
| 1999 | 36 | 0 |
| 2000 | 31 | 0 |
| 2001 | 24 | 10 |
| 2002 | 32 | 29 |
| 2003 | 35 | 36 |
| 2004 | 31 | 33 |
| 2005 | 13 | 45 |
| 2006 | 19 | 28 |
| 2007 | 26 | 30 |
| 2008 | 22 | 17 |
| 2009 | 19 | 16 |
| 2010 | 16 | 29 |
| 2011 | 18 | 14 |
| 2012 | 15 | 13 |
| 2013 | 19 | 22 |
| 2014 | 19 | 21 |
| 2015 | 11 | 19 |
| 2016 | 18 | 19 |
| 2017 | 24 | 21 |
| 2018 | 12 | 17 |
| 2019 | 9 | 19 |
| 2020 | 10 | 25 |
| 2021 | 13 | 26 |
| 2022 | 10 | 47 |
| 2023 | 25 | 33 |
| 2024 | 26 | 20 |
| 2025 | 32 | 19 |
| 2026 | 12 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Asymmetric donor-acceptor molecular dyes11 Aug 2026US 12,707,888 B2The University of North Carolina at Charlotte
- Non-sealing fluid-based writing instrument and non-drying writing fluid28 Jul 2026US 12,691,704 B2
- Writing gel ink28 Jul 2026US 12,692,409 B2Societe BIC
- Peelable ink composition with color-changing for porous substrates30 Jun 2026US 12,668,710 B2Societe BIC
- Oil-based ballpoint pen16 Jun 2026US 12,654,483 B2Kabushiki Kaisha Pilot Corporation
- Additive for invisible flexographic inks17 Sep 2026US 2026/0275141 A1Nocopi Technologies, Inc.
- Oil-in-water ink composition for writing utensils3 Sep 2026US 2026/0258263 A1Mitsubishi Pencil Company, Limited
- Functional particle dispersion20 Aug 2026US 2026/0242624 A1Mitsubishi Pencil Company, Limited
- A composition for dyeing a substrate and use thereof13 Aug 2026US 2026/0234426 A1Staedtler SE
- Composition for dyeing a substrate and use thereof6 Aug 2026US 2026/0226297 A1Staedtler SE
Most cited
By later US patents
- Process for preparing carbon materials with diazonium salts and resultant carbon products257US 5,554,739 ACabot Corporation · 1996
- Water-based pigment ink and process for producing the same195US 5,609,671 AOrient Chemical Industries, Ltd. · 1997
- Reaction of carbon black with diazonium salts, resultant carbon black products and their uses157US 5,851,280 ACabot Corporation · 1998
- Aqueous inks and coatings containing modified carbon products156US 5,672,198 ACabot Corporation · 1997
- Reaction of carbon black with diazonium salts, resultant carbon black products and their uses123US 6,042,643 ACabot Corporation · 2000