D21C 1/02
Pretreatment of the finely-divided materials before digesting: with water or steam
Official title: with water or steam
D21C1/02 (Pretreatment of the finely-divided materials before digesting: with water or steam) appears on 216 US grants and 291 published applications in this corpus.
Search patents in D21C- Granted patents
- 216
- Published applications
- 291
- Assignees
- 155
- Inventors
- 574
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 2 |
| 2003 | 1 | 2 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 2 | 5 |
| 2008 | 0 | 5 |
| 2009 | 2 | 9 |
| 2010 | 3 | 6 |
| 2011 | 3 | 14 |
| 2012 | 6 | 15 |
| 2013 | 7 | 14 |
| 2014 | 9 | 13 |
| 2015 | 14 | 20 |
| 2016 | 14 | 14 |
| 2017 | 11 | 20 |
| 2018 | 11 | 13 |
| 2019 | 14 | 18 |
| 2020 | 7 | 18 |
| 2021 | 18 | 27 |
| 2022 | 9 | 20 |
| 2023 | 14 | 16 |
| 2024 | 20 | 16 |
| 2025 | 15 | 9 |
| 2026 | 9 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method for producing a biofuel by steam cracking18 Aug 2026US 12,709,715 B2Europeenne De Biomasse
- Process and system for producing pulp, energy, and bioderivatives from plant-based and recycled materials14 Jul 2026US 12,678,759 B2Circ, LLC
- Process and system for producing pulp, energy, and bioderivatives from plant-based and recycled materials28 Apr 2026US 12,611,644 B2Circ, LLC
- High yield cooking method14 Apr 2026US 12,601,114 B2AMPPC Finland Oy
- Biomass processing system for treatment of biomass material8 Oct 2026US 2026/0308845 A1Valmet Corporation
- Process and System for Producing Pulp, Energy, and Bioderivatives from Plant-Based and Recycled Materials10 Sep 2026US 2026/0264040 A1Circ, LLC
- Preparation of Maple Wood for CTMP Production30 Jul 2026US 2026/0218448 A1Billerud Aktiebolag (publ)
- Maple HT-CTMP30 Jul 2026US 2026/0218449 A1Billerud Aktiebolag (publ)
- Production of ctmp from a hardwood/softwood mixture23 Jul 2026US 2026/0210039 A1Billerud Aktiebolag (publ)
Most cited
By later US patents
- Method of treating lignocellulosic biomass to produce cellulose109US 6,419,788 B1PureVision Technology, Inc. · 2002
- Cellulose production from lignocellulosic biomass93US 6,620,292 B2PureVision Technology, Inc. · 2003
- System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process51US 8,057,639 B2Andritz Inc. · 2011
- Method of continuous processing of lignocellulosic feedstock44US 7,754,457 B2Iogen Energy Corporation · 2010
- Process to produce a high quality paper product and an ethanol product from bamboo40US 5,198,074 ACompanhia Industreas Brasileiras Portela · 1993