D21H 13/38
Siliceous
Official title: siliceous
D21H13/38 (Siliceous) appears on 429 US grants and 288 published applications in this corpus.
Search patents in D21H- Granted patents
- 429
- Published applications
- 288
- Assignees
- 236
- Inventors
- 845
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 6 | 0 |
| 1980 | 9 | 0 |
| 1981 | 17 | 0 |
| 1982 | 7 | 0 |
| 1983 | 17 | 0 |
| 1984 | 18 | 0 |
| 1985 | 17 | 0 |
| 1986 | 6 | 0 |
| 1987 | 10 | 0 |
| 1988 | 9 | 0 |
| 1989 | 9 | 0 |
| 1990 | 9 | 0 |
| 1991 | 9 | 0 |
| 1992 | 12 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 12 | 0 |
| 1996 | 6 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 12 | 0 |
| 2000 | 8 | 0 |
| 2001 | 12 | 4 |
| 2002 | 10 | 7 |
| 2003 | 10 | 26 |
| 2004 | 14 | 9 |
| 2005 | 7 | 23 |
| 2006 | 5 | 15 |
| 2007 | 8 | 21 |
| 2008 | 5 | 16 |
| 2009 | 6 | 8 |
| 2010 | 13 | 18 |
| 2011 | 16 | 17 |
| 2012 | 14 | 14 |
| 2013 | 11 | 10 |
| 2014 | 8 | 13 |
| 2015 | 6 | 10 |
| 2016 | 2 | 16 |
| 2017 | 4 | 5 |
| 2018 | 8 | 7 |
| 2019 | 8 | 7 |
| 2020 | 7 | 4 |
| 2021 | 3 | 4 |
| 2022 | 4 | 8 |
| 2023 | 3 | 9 |
| 2024 | 6 | 8 |
| 2025 | 4 | 6 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Moving fluid in a rotating cylinder11 Aug 2026US 12,703,945 B2
- Filter material for air filter and method for producing filter material14 Jul 2026US 12,678,724 B2Hokuetsu Corporation
- Fiber diameter measuring device, inorganic fiber sheet producing device, method for measuring fiber diameter, and method for producing inorganic fiber sheet30 Jun 2026US 12,668,925 B2Maftec Co., Ltd.
- Electrical insulation paper12 May 2026US 12,626,836 B2Ahlstrom Oyj
- Space filling material, method for manufacturing same, and space filling structure10 Mar 2026US 12,571,163 B2Kuraray Co., Ltd.
- Ceiling basemat water reduction through strategic use of pressing and vacuuming17 Sep 2026US 2026/0275636 A1USG Interiors, Inc.
- Inorganic fiber sheet23 Jul 2026US 2026/0208083 A1Tomoegawa Co., Ltd.
- Filter material for air filter, and method for manufacturing same25 Jun 2026US 2026/0175152 A1Hokuetsu Corporation
- Thermal insulating/flame barrier sheet and battery pack and battery module package using the same9 Oct 2025US 2025/0316791 A1Imae Industries, Ltd.
- Electrical insulation paper14 Aug 2025US 2025/0259764 A1Ahlstrom Oyj
Most cited
By later US patents
- Filtration structures of wet laid, bicomponent fiber148US 5,580,459 AHoechst Celanese Corporation · 1996
- Formable pulp compositions123US 4,562,218 AArmstrong World Industries, Inc. · 1985
- Wet laid bonded fibrous web containing bicomponent fibers including LLDPE116US 5,167,765 AHoechst Celanese Corporation · 1992
- Process for the production of a floor strip107US 6,517,935 B1Pergo (Europe) AB · 2003
- Intumescent sheet material103US 4,305,992 AMinnesota Mining and Manufacturing Company · 1981