D21C 9/004
Inorganic compounds
Official title: {inorganic compounds}
D21C9/004 (Inorganic compounds) appears on 185 US grants and 215 published applications in this corpus.
Search patents in D21C- Granted patents
- 185
- Published applications
- 215
- Assignees
- 118
- Inventors
- 434
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 8 | 4 |
| 2002 | 14 | 22 |
| 2003 | 13 | 15 |
| 2004 | 11 | 7 |
| 2005 | 4 | 6 |
| 2006 | 7 | 5 |
| 2007 | 3 | 8 |
| 2008 | 1 | 3 |
| 2009 | 3 | 4 |
| 2010 | 3 | 3 |
| 2011 | 3 | 7 |
| 2012 | 5 | 2 |
| 2013 | 4 | 9 |
| 2014 | 5 | 8 |
| 2015 | 1 | 14 |
| 2016 | 9 | 8 |
| 2017 | 4 | 9 |
| 2018 | 5 | 16 |
| 2019 | 9 | 12 |
| 2020 | 10 | 12 |
| 2021 | 10 | 9 |
| 2022 | 10 | 12 |
| 2023 | 6 | 6 |
| 2024 | 2 | 2 |
| 2025 | 4 | 9 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for reducing amount of bacterial endospores in an aqueous fibre suspension28 Apr 2026US 12,612,736 B2Kemira Oyj
- Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials25 Nov 2025US 12,480,255 B2Pierson Capital Environmental (Beijing) Limited
- Method for preparing unbleached biomechanical pulp from straws and full utilization of by-products14 Oct 2025US 12,442,134 B2Qilu University of Technology
- Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials30 Sep 2025US 12,428,785 B2Pierson Capital Environmental (Beijing) Limited
- Process for manufacturing a fibre web6 May 2025US 12,291,820 B2
- Method for bleaching cellulose pulp formed from recycled textile material9 Jul 2026US 2026/0193838 A1Valmet Corporation
- Plant fibre product26 Mar 2026US 2026/0085168 A1Beyondwood CoöPeration U.A.
- Producing nanofibers, microfibers, and lignin from lignocellulosic biomass22 Jan 2026US 2026/0022519 A1University of Washington
- Sustainable process for fabrication of hydrophobic lightweight products from cellulose-based pulps18 Dec 2025US 2025/0382430 A1OrganoGraph AB
- Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials6 Nov 2025US 2025/0341054 A1Pierson Capital Environmental (Beijing) Limited
Most cited
By later US patents
- Lyocell fibers and process for their preparation138US 6,235,392 B1Weyerhaeuser Company · 2001
- Lyocell fibers having enhanced CV properties115US 6,221,487 B1Weyerhauser Company · 2001
- Method for fiber loading a chemical compound109US 5,223,090 AThe United States of America as represented by the Secretary of Agriculture · 1993
- Lyocell nonwoven fabric98US 7,067,444 B2Weyerhaeuser Company · 2006
- Method of making carboxylated cellulose fibers and products of the method94US 6,379,494 B1Weyerhaeuser Company · 2002