D21H 13/20
From macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated
Official title: from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
D21H13/20 (From macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated) appears on 468 US grants and 463 published applications in this corpus.
Search patents in D21H- Granted patents
- 468
- Published applications
- 463
- Assignees
- 279
- Inventors
- 1,232
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 12 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 4 | 0 |
| 1990 | 8 | 0 |
| 1991 | 8 | 0 |
| 1992 | 15 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 12 | 0 |
| 1996 | 6 | 0 |
| 1997 | 12 | 0 |
| 1998 | 15 | 0 |
| 1999 | 24 | 0 |
| 2000 | 18 | 0 |
| 2001 | 20 | 4 |
| 2002 | 16 | 16 |
| 2003 | 15 | 22 |
| 2004 | 9 | 19 |
| 2005 | 11 | 18 |
| 2006 | 6 | 14 |
| 2007 | 4 | 28 |
| 2008 | 6 | 11 |
| 2009 | 2 | 15 |
| 2010 | 15 | 23 |
| 2011 | 5 | 12 |
| 2012 | 14 | 17 |
| 2013 | 12 | 28 |
| 2014 | 14 | 21 |
| 2015 | 8 | 24 |
| 2016 | 13 | 18 |
| 2017 | 11 | 17 |
| 2018 | 11 | 16 |
| 2019 | 15 | 15 |
| 2020 | 11 | 23 |
| 2021 | 12 | 21 |
| 2022 | 16 | 21 |
| 2023 | 18 | 24 |
| 2024 | 14 | 15 |
| 2025 | 5 | 9 |
| 2026 | 7 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Impregnating coating layer for insulating sheetsand multilayer laminates15 Sep 2026US 12,734,766 B2Coveme S.P.A.
- Circuit board unwoven fabric, circuit board prepreg using same and circuit board using same23 Jun 2026US 12,662,775 B2Dupont Safety & Construction, Inc.
- Thermoplastic sheets and articles with variable lofting capacity26 May 2026US 12,636,852 B2Hanwha Azdel, Inc.
- Electrical insulation paper12 May 2026US 12,626,836 B2Ahlstrom Oyj
- Solid-state composite electrolytes comprising aramid polymer fibrils17 Mar 2026US 12,580,221 B2Dupont Safety & Construction, Inc.
- Polyimide fibre paper1 Oct 2026US 2026/0297851 A1Dupont Electronics, Inc.
- Carbon material precursor and method for producing carbon material using same30 Jul 2026US 2026/0218454 A1Nippon Paper Industries Co., Ltd.
- Inorganic fiber sheet23 Jul 2026US 2026/0208083 A1Tomoegawa Co., Ltd.
- Fibrous structure, thermal insulation material, housing device, battery, flight vehicle, and method for producing fibrous structure23 Jul 2026US 2026/0213305 A1SoftBank Corp.
- Keratin material16 Jul 2026US 2026/0201146 A1Wool Research Organisation of New Zealand, Inc.
Most cited
By later US patents
- Fibrous structures containing immobilized particulate matter181US 5,486,410 AHoechst Celanese Corporation · 1996
- Dispersible nonwoven fabric and method of making same166US 5,935,880 A1999
- Filtration structures of wet laid, bicomponent fiber148US 5,580,459 AHoechst Celanese Corporation · 1996
- Cloth-like base sheet and method for making the same144US 6,315,864 B2Kimberly-Clark Worldwide, Inc. · 2001
- Cellulose-Based medical packaging material sterilizable by oxidizing gas plasma127US 6,156,677 AKimberly-Clark Worldwide, Inc. · 2000