H01M 50/491
Porosity
H01M50/491 (Porosity) appears on 1,725 US grants and 2,805 published applications in this corpus.
Search patents in H01M- Granted patents
- 1,725
- Published applications
- 2,805
- Assignees
- 642
- Inventors
- 4,518
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 8 | 0 |
| 1980 | 15 | 0 |
| 1981 | 9 | 0 |
| 1982 | 10 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 13 | 0 |
| 1995 | 9 | 0 |
| 1996 | 10 | 0 |
| 1997 | 11 | 0 |
| 1998 | 19 | 0 |
| 1999 | 15 | 0 |
| 2000 | 15 | 0 |
| 2001 | 19 | 9 |
| 2002 | 16 | 16 |
| 2003 | 19 | 42 |
| 2004 | 16 | 19 |
| 2005 | 12 | 30 |
| 2006 | 13 | 43 |
| 2007 | 14 | 41 |
| 2008 | 9 | 26 |
| 2009 | 16 | 75 |
| 2010 | 36 | 64 |
| 2011 | 34 | 93 |
| 2012 | 45 | 85 |
| 2013 | 42 | 122 |
| 2014 | 55 | 120 |
| 2015 | 67 | 123 |
| 2016 | 77 | 116 |
| 2017 | 100 | 151 |
| 2018 | 113 | 133 |
| 2019 | 128 | 187 |
| 2020 | 123 | 124 |
| 2021 | 96 | 135 |
| 2022 | 72 | 134 |
| 2023 | 89 | 231 |
| 2024 | 106 | 237 |
| 2025 | 121 | 263 |
| 2026 | 87 | 186 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Separator for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery6 Oct 2026US 12,756,065 B2Panasonic Energy Co., Ltd.
- Solvent free separators6 Oct 2026US 12,756,066 B2Amtek Research International LLC
- Separator for secondary battery and preparation method therefor, secondary battery, battery module, battery pack, and power consuming device6 Oct 2026US 12,756,067 B2Contemporary Amperex Technology (Hong Kong) Limited
- Separator and a method for manufacturing thereof6 Oct 2026US 12,756,069 B2BenQ Materials Corporation
- System and method for a self-protecting separator for a battery6 Oct 2026US 12,756,070 B2GM Global Technology Operations LLC
- Lithium Secondary Battery Having Excellent Thermal Safety And Method For Manufacturing The Same8 Oct 2026US 2026/0312232 A1LG Energy Solution, Ltd.
- Separator with a ceramic-comprising separator layer8 Oct 2026US 2026/0312233 A1Sila Nanotechnologies, Inc.
- All-solid rechargeable battery module1 Oct 2026US 2026/0302500 A1Samsung SDI.Co., Ltd.
- Separator for Power Storage Device1 Oct 2026US 2026/0302530 A1Asahi Kasei Battery Separator Corporation
- Separator, secondary battery, and a method for manufacturing separator1 Oct 2026US 2026/0302533 A1Semiconductor Energy Laboratory Co.Ltd.
Most cited
By later US patents
- Separator for a high energy rechargeable lithium battery178US 6,432,586 B1Celgard, LLC · 2002
- Composite solid polymer electrolyte membranes158US 6,248,469 B1Foster-Miller, Inc. · 2001
- Nonaqueous battery having porous separator and production method thereof140US 6,287,720 B1Asahi Kasei Kabushiki Kaisha · 2001
- Process of manufacturing porous separator for electrochemical power supply125US 5,882,721 A1999
- Articles having a polymeric shell and method for preparing same111US 5,443,727 AMinnesota Mining and Manufacturing Company · 1995