D21H 17/70
Forming new compounds in situ
Official title: forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately
D21H17/70 (Forming new compounds in situ) appears on 101 US grants and 133 published applications in this corpus.
Search patents in D21H- Granted patents
- 101
- Published applications
- 133
- Assignees
- 74
- Inventors
- 252
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 9 | 7 |
| 2003 | 5 | 4 |
| 2004 | 5 | 13 |
| 2005 | 3 | 4 |
| 2006 | 1 | 3 |
| 2007 | 3 | 9 |
| 2008 | 0 | 3 |
| 2009 | 2 | 4 |
| 2010 | 1 | 2 |
| 2011 | 0 | 5 |
| 2012 | 4 | 4 |
| 2013 | 5 | 9 |
| 2014 | 4 | 4 |
| 2015 | 5 | 6 |
| 2016 | 2 | 6 |
| 2017 | 2 | 3 |
| 2018 | 3 | 6 |
| 2019 | 2 | 10 |
| 2020 | 4 | 6 |
| 2021 | 11 | 9 |
| 2022 | 3 | 4 |
| 2023 | 4 | 4 |
| 2024 | 2 | 0 |
| 2025 | 1 | 5 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sol application methods12 May 2026US 12,623,197 B2Green Sol-Gel Ltd.
- Method and device for acylating a moving hydroxylated material10 Mar 2026US 12,571,164 B2Cellulotech Inc
- Binder and formed body producing method29 Apr 2025US 12,286,755 B2Seiko Epson Corporation
- Preparation method of heat-not-burn cigarette paper with boron nitride as thermally-conductive filler1 Oct 2024US 12,104,325 B2Zhejiang University
- Paperboard and a method of producing a paperboard9 Apr 2024US 11,952,718 B2Stora Enso OYJ
- Recyclable cellulose-based substrate comprising cellulosic fibres and nonfibrous cellulosic material30 Jul 2026US 2026/0217869 A1
- Sheet material including metal organic framework7 May 2026US 2026/0125852 A1Kabushiki Kaisha F.C.C.
- Methods for production of precipitated calcium carbonate (pcc), pcc product, and uses of pcc3 Jul 2025US 2025/0214894 A1Specialty Minerals (Michigan) Inc.
- Composite fibers and methods of making the same3 Jul 2025US 2025/0215643 A1Specialty Minerals (Michigan) Inc.
- Flexible calcium carbonate with improved calcium carbonate retention, tissue paper including the same, and manufacturing method therefor3 Jul 2025US 2025/0215645 A1KleanNara Co., Ltd.
Most cited
By later US patents
- Highly loaded fiber-based composite material146US 5,731,080 AInternational Paper Company · 1998
- Wrapper for smoking articles and method122US 4,450,847 AOlin Corporation · 1984
- Acid-to-alkaline papermaking process122US 5,240,561 AIndustrial Progress, Inc. · 1993
- Method for fiber loading a chemical compound109US 5,223,090 AThe United States of America as represented by the Secretary of Agriculture · 1993
- Method of producing a building element64US 4,350,567 ACSR Limited · 1982