C09B 67/0017
Influencing the physical properties by treatment with an acid, h2so4
Official title: {Influencing the physical properties by treatment with an acid, H2SO4}
C09B67/0017 (Influencing the physical properties by treatment with an acid, h2so4) appears on 117 US grants and 72 published applications in this corpus.
Search patents in C09B- Granted patents
- 117
- Published applications
- 72
- Assignees
- 58
- Inventors
- 285
- Latest grant
- 18 Nov 2025
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| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 3 |
| 2003 | 2 | 3 |
| 2004 | 3 | 3 |
| 2005 | 2 | 1 |
| 2006 | 1 | 5 |
| 2007 | 2 | 3 |
| 2008 | 2 | 4 |
| 2009 | 0 | 2 |
| 2010 | 2 | 6 |
| 2011 | 5 | 4 |
| 2012 | 3 | 2 |
| 2013 | 1 | 4 |
| 2014 | 2 | 1 |
| 2015 | 0 | 3 |
| 2016 | 5 | 4 |
| 2017 | 3 | 2 |
| 2018 | 2 | 2 |
| 2019 | 1 | 3 |
| 2020 | 1 | 3 |
| 2021 | 2 | 2 |
| 2022 | 1 | 3 |
| 2023 | 1 | 1 |
| 2024 | 3 | 2 |
| 2025 | 2 | 2 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Disperse dyes for dyeing polyester fibres8 Oct 2026US 2026/0308841 A1University of Leeds
- Stabilized two-part hematoxylin solution utilizing ph adjustment12 Feb 2026US 2026/0043720 A1Ventana Medical Systems, Inc.
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- On-slide synthesis of a schiff reagent22 May 2025US 2025/0164360 A1Ventana Medical Systems, Inc.
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Most cited
By later US patents
- Quinacridone nanoscale pigment particles96US 7,427,323 B1Xerox Corporation · 2008
- Processes for the preparation of titanium-phthalocyanine Type X72US 5,189,156 AXerox Corporation · 1993
- Processes for the preparation of photogenerating pigments57US 5,153,094 AXerox Corporation · 1992
- Preparation of stable solutions of azo dyes of m-phenylenediamine by reaction with formic acid54US 4,952,680 ABASF SE · 1990
- Process for the preparation of pigment dispersion, pigment dispersion obtained by the same, ink jet recording ink comprising the same, and recording method and recorded material using the same52US 6,916,862 B2Seiko Epson Corporation · 2005