H01G 7/023
Of macromolecular compounds
Official title: {of macromolecular compounds}
H01G7/023 (Of macromolecular compounds) appears on 127 US grants and 54 published applications in this corpus.
Search patents in H01G- Granted patents
- 127
- Published applications
- 54
- Assignees
- 77
- Inventors
- 243
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 8 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 5 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 1 | 1 |
| 2008 | 1 | 3 |
| 2009 | 2 | 1 |
| 2010 | 1 | 4 |
| 2011 | 2 | 9 |
| 2012 | 5 | 3 |
| 2013 | 3 | 6 |
| 2014 | 4 | 3 |
| 2015 | 1 | 1 |
| 2016 | 4 | 1 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 4 |
| 2020 | 1 | 1 |
| 2021 | 3 | 3 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 1 | 0 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Structure exhibiting a flexoelectric effect1 Jul 2025US 12,347,629 B2Murata Manufacturing Co., Ltd.
- Methods of saturating nonwoven fabrics with liquid and the making of electret thereof18 Mar 2025US 12,252,826 B2University of Tennessee Research Foundation
- Electret sheet and piezoelectric sensor20 Feb 2024US 11,908,629 B2Sekisui Chemical Co., Ltd.
- Fully degradable non-woven fabric produced by melt-blow extrusion and application thereof in production of medical masks12 Dec 2023US 11,840,783 B2China Yunhong Holdings Co., Ltd.
- Electret sheet27 Jun 2023US 11,688,563 B2Sekisui Chemical Co., Ltd.
- Electrets for power electronic applications30 Apr 2026US 2026/0120959 A1
- Electret material and skin-patch type electret energy harvesting device using same30 Oct 2025US 2025/0336613 A1AGC Inc.
- Electret and electret filter14 Aug 2025US 2025/0256229 A1TOYOBO MC Corporation
- Structure exhibiting a flexoelectric effect30 Nov 2023US 2023/0386755 A1Murata Manufacturing Co., Ltd.
- Electret membrane, preparation method, refrigerator body assembly and refrigeration apparatus13 Jul 2023US 2023/0217965 A1Hefei Hualing Co., Ltd.
Most cited
By later US patents
- Melt-blown fibrous electrets387US 4,215,682 AMinnesota Mining and Manufacturing Company · 1980
- Method for manufacturing an electret filter medium243US 4,588,537 AMinnesota Mining and Manufacturing Company · 1986
- Method of making fibrous electrets241US 4,375,718 ASurgikos, Inc. · 1983
- Method of manufacturing an electret filter230US 4,592,815 AJapan Vilene Company, Ltd. · 1986
- Electret filter made of fibers containing polypropylene and poly(4-methyl-1-pentene)145US 4,874,399 AMinnesota Mining and Manufacturing Company · 1989