Improved lead acid battery separators, separator and electrode assemblies, batteries, systems, and related methods
US-2021336273-A1 · Oct 28, 2021 · US
for lead-acid accumulators, e.g. frame plates
for lead-acid accumulators, e.g. frame plates · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M4/73 |
| Official title | for lead-acid accumulators, e.g. frame plates |
| Display label | for lead-acid accumulators, e.g. frame plates |
| Total patents | 101 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 9 |
| 2017 | 13 |
| 2018 | 7 |
| 2019 | 6 |
| 2020 | 6 |
| 2021 | 9 |
| 2022 | 5 |
| 2023 | 10 |
| 2024 | 16 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Improved lead acid battery separators, warp resistant separators, batteries, systems, and related methods
US-2021313653-A1 · Oct 7, 2021 · US
Battery and battery plate assembly with absorbent separator
US-2021218033-A1 · Jul 15, 2021 · US
Battery and battery plate assembly with highly absorbent separator
US-10985380-B2 · Apr 20, 2021 · US
Electrical power storage devices
US-2021057756-A1 · Feb 25, 2021 · US
Battery grid with varied corrosion resistance
US-10892491-B2 · Jan 12, 2021 · US
Rechargeable lead-acid battery with compound and sludge leveling and shedding capability
US-2020358136-A1 · Nov 12, 2020 · US
Electrical power storage devices
US-10818930-B2 · Oct 27, 2020 · US
Lead storage battery
US-2020266495-A1 · Aug 20, 2020 · US
Lead-acid battery grid and lead-acid battery
US-2020243869-A1 · Jul 30, 2020 · US
Lead-acid battery and method for producing lead-acid battery
US-10622634-B2 · Apr 14, 2020 · US
Absorbent glass mat battery
US-2020106070-A1 · Apr 2, 2020 · US
Battery grid
US-2019393512-A1 · Dec 26, 2019 · US
Battery housing
US-2019379018-A1 · Dec 12, 2019 · US
Positive electrode grid for lead acid batteries and method for producing the same, and lead acid battery
US-10276895-B2 · Apr 30, 2019 · US
Separator for lead-acid battery, and lead-acid battery
US-10270136-B2 · Apr 23, 2019 · US
Lead-acid battery
US-2019058180-A1 · Feb 21, 2019 · US
Lead acid battery
US-10205193-B2 · Feb 12, 2019 · US
Lead-acid battery
US-10096862-B2 · Oct 9, 2018 · US
Valve regulated lead-acid battery
US-10084209-B2 · Sep 25, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M4/73?
- CPC H01M4/73 is the Cooperative Patent Classification code for “for lead-acid accumulators, e.g. frame plates.”
- How many patents are filed under CPC H01M4/73 (for lead-acid accumulators, e.g. frame plates)?
- Our database includes 101 publications tagged with this CPC code.
- Is patent activity under CPC H01M4/73 growing?
- Publication counts under this code: 16 in 2024 vs 6 in 2025 (latest complete years).