H01M 50/40
Separators
Official title: Separators; Membranes; Diaphragms; Spacing elements inside cells
H01M50/40 (Separators) appears on 7,661 US grants and 12,659 published applications in this corpus.
Search patents in H01M- Granted patents
- 7,661
- Published applications
- 12,659
- Assignees
- 2,080
- Inventors
- 17,522
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 29 | 0 |
| 1977 | 24 | 0 |
| 1978 | 36 | 0 |
| 1979 | 22 | 0 |
| 1980 | 44 | 0 |
| 1981 | 48 | 0 |
| 1982 | 41 | 0 |
| 1983 | 32 | 0 |
| 1984 | 24 | 0 |
| 1985 | 19 | 0 |
| 1986 | 23 | 0 |
| 1987 | 25 | 0 |
| 1988 | 18 | 0 |
| 1989 | 29 | 0 |
| 1990 | 24 | 0 |
| 1991 | 27 | 0 |
| 1992 | 21 | 0 |
| 1993 | 37 | 0 |
| 1994 | 37 | 0 |
| 1995 | 39 | 0 |
| 1996 | 46 | 0 |
| 1997 | 62 | 0 |
| 1998 | 63 | 0 |
| 1999 | 61 | 0 |
| 2000 | 61 | 0 |
| 2001 | 88 | 53 |
| 2002 | 115 | 138 |
| 2003 | 95 | 148 |
| 2004 | 95 | 109 |
| 2005 | 60 | 131 |
| 2006 | 69 | 162 |
| 2007 | 58 | 160 |
| 2008 | 49 | 138 |
| 2009 | 48 | 185 |
| 2010 | 127 | 225 |
| 2011 | 125 | 310 |
| 2012 | 151 | 334 |
| 2013 | 169 | 364 |
| 2014 | 197 | 480 |
| 2015 | 254 | 522 |
| 2016 | 287 | 502 |
| 2017 | 380 | 592 |
| 2018 | 416 | 578 |
| 2019 | 460 | 642 |
| 2020 | 534 | 745 |
| 2021 | 430 | 733 |
| 2022 | 474 | 821 |
| 2023 | 456 | 1136 |
| 2024 | 560 | 1168 |
| 2025 | 617 | 1281 |
| 2026 | 455 | 1002 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01M 50/409Separators, membranes or diaphragms characterised by the material5,542
- H01M 50/489Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their3,097
- H01M 50/46Separators, membranes or diaphragms characterised by their combination with electrodes2,021
- H01M 50/403Manufacturing processes of separators, membranes or diaphragms1,754
- H01M 50/463Separators, membranes or diaphragms characterised by their shape970
- H01M 50/471Spacing elements inside cells other than separators, membranes or diaphragms317
Recent patents
- 3-D composite anodes for Li-ion batteries with high capacity and fast charging capability6 Oct 2026US 12,755,958 B2The Regents of the University of Michigan
- Non-aqueous electrolyte secondary battery6 Oct 2026US 12,755,982 B2Sanyo Electric Co., Ltd.
- Garnet-type lithium-ion solid-state conductor6 Oct 2026US 12,756,004 B2Samsung Electronics Co., Ltd.
- Energy storage device6 Oct 2026US 12,756,047 B2Contemporary Amperex Technology Co., Limited
- Cylindrical secondary battery with cap assembly configured for deformation during gas discharge6 Oct 2026US 12,756,058 B2Samsung SDI.Co., Ltd.
- Cohesively bonded, microporous multilayer films8 Oct 2026US 2026/0307378 A1Amtek Research International LLC
- Method for Fabricating Anode Electrodes with an Anode Active Material Layer Including 2D Carbon Additives for Lithium-Ion Battery Cells8 Oct 2026US 2026/0312001 A1GM Global Technology Operations LLC
- Surface etched battery electrodes via phase separation8 Oct 2026US 2026/0312060 A1Ford Global Technologies, LLC
- Electrolyte for a lithium metal battery and a lithium metal battery including the same8 Oct 2026US 2026/0312123 A1Hyundai Motor Company
- Sulphide based lithium-ion mixed halide conducting solid electrolyte and methods for the production thereof8 Oct 2026US 2026/0312127 A1Umicore AG & Co. KG
Most cited
By later US patents
- Ionic semiconductor materials and applications thereof795US 5,055,171 AT and G Corporation · 1991
- Method for manufacturing porous structure and method for forming pattern645US 6,565,763 B1Kabushiki Kaisha Toshiba · 2003
- Microporous sheet material, method of making and articles made therewith399US 4,539,256 AMinnesota Mining and Manufacturing Company · 1985
- Stabilized anode for lithium-polymer batteries392US 5,961,672 AMoltech Corporation · 1999
- Protective lithium ion conducting ceramic coating for lithium metal anodes and associate method376US 5,314,765 AMartin Marietta Energy Systems, Inc. · 1994