D21C 9/1036
Use of compounds accelerating or improving the efficiency of the processes
Official title: {Use of compounds accelerating or improving the efficiency of the processes}
D21C9/1036 (Use of compounds accelerating or improving the efficiency of the processes) appears on 156 US grants and 133 published applications in this corpus.
Search patents in D21C- Granted patents
- 156
- Published applications
- 133
- Assignees
- 115
- Inventors
- 418
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 7 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 11 | 0 |
| 2001 | 9 | 4 |
| 2002 | 6 | 3 |
| 2003 | 4 | 7 |
| 2004 | 3 | 2 |
| 2005 | 1 | 3 |
| 2006 | 3 | 5 |
| 2007 | 1 | 4 |
| 2008 | 2 | 4 |
| 2009 | 2 | 11 |
| 2010 | 2 | 6 |
| 2011 | 4 | 11 |
| 2012 | 6 | 7 |
| 2013 | 5 | 12 |
| 2014 | 9 | 8 |
| 2015 | 4 | 5 |
| 2016 | 3 | 6 |
| 2017 | 5 | 5 |
| 2018 | 8 | 6 |
| 2019 | 2 | 4 |
| 2020 | 4 | 6 |
| 2021 | 6 | 3 |
| 2022 | 1 | 2 |
| 2023 | 3 | 6 |
| 2024 | 1 | 0 |
| 2025 | 2 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Xylanase variants14 Apr 2026US 12,600,960 B2AB Enzymes Finland Oy
- Process and apparatus for producing bleached cellulose24 Feb 2026US 12,559,885 B2Messer Austria GmbH
- High yield chemical pulping and bleaching process7 Oct 2025US 12,435,469 B2GPCP IP Holdings LLC
- Oxygen treatment of high kappa fibers29 Apr 2025US 12,286,751 B2GPCP IP Holdings LLC
- Oxygen bleaching method of pulp1 Oct 2024US 12,104,321 B2Beijing Forestry University
- Chemical wood pulp with enhanced tensile strength6 Aug 2026US 2026/0226685 A1SöDra SkogsäGarna Ekonomisk FöRening
- Method for bleaching cellulose pulp formed from recycled textile material9 Jul 2026US 2026/0193838 A1Valmet Corporation
- Xylanase Variants16 Jan 2025US 2025/0019682 A1AB Enzymes Oy
- Method for bleaching pulp from recycled textile material7 Dec 2023US 2023/0392320 A1Valmet Corporation
- Oxygen bleaching method of pulp31 Aug 2023US 2023/0272580 A1Beijing Forestry University
Most cited
By later US patents
- Method for the alkaline bleaching of pulp with a peroxyacid based oxygen bleaching species using an agglomerated bleach activator89US 6,569,286 B1Warwick International Group Limited · 2003
- Method for using an all solid-state fluorometer in industrial water system applications77US 6,255,118 B1Nalco Chemical Company · 2001
- Use of metal complex compounds as oxidation catalysts57US 7,161,005 B2Ciba Specialty Chemicals Corporation · 2007
- Thermostable xylanases55US 6,083,733 AGist-Brocades N. V. · 2000
- Metal ligand containing bleaching compositions55US 6,241,779 B1Carnegie Mellon University · 2001