D21H 13/40
Vitreous
Official title: vitreous, e.g. mineral wool, glass fibres
D21H13/40 (Vitreous) appears on 344 US grants and 244 published applications in this corpus.
Search patents in D21H- Granted patents
- 344
- Published applications
- 244
- Assignees
- 197
- Inventors
- 697
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 12 | 0 |
| 1982 | 4 | 0 |
| 1983 | 11 | 0 |
| 1984 | 15 | 0 |
| 1985 | 12 | 0 |
| 1986 | 5 | 0 |
| 1987 | 8 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 8 | 0 |
| 1991 | 8 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 10 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 11 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 3 |
| 2002 | 9 | 6 |
| 2003 | 8 | 23 |
| 2004 | 13 | 6 |
| 2005 | 6 | 22 |
| 2006 | 4 | 13 |
| 2007 | 8 | 19 |
| 2008 | 4 | 14 |
| 2009 | 5 | 8 |
| 2010 | 11 | 14 |
| 2011 | 12 | 8 |
| 2012 | 11 | 13 |
| 2013 | 8 | 10 |
| 2014 | 6 | 11 |
| 2015 | 5 | 6 |
| 2016 | 2 | 13 |
| 2017 | 1 | 5 |
| 2018 | 6 | 7 |
| 2019 | 7 | 6 |
| 2020 | 7 | 4 |
| 2021 | 2 | 4 |
| 2022 | 4 | 6 |
| 2023 | 3 | 8 |
| 2024 | 5 | 6 |
| 2025 | 4 | 6 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- 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.
- Method for manufacturing acoustical elements9 Sep 2025US 12,409,584 B2Saint-Gobain Ecophon AB
- 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
- Composite fiberboard and process of manufacture95US 4,963,603 AArmstrong World Industries, Inc. · 1990