Lead-acid battery
US-12567578-B2 · Mar 3, 2026 · US
of "grey lead", i.e. powders containing lead and lead oxide
of "grey lead", i.e. powders containing lead and lead oxide · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M4/57 |
| Official title | of "grey lead", i.e. powders containing lead and lead oxide |
| Display label | of "grey lead", i.e. powders containing lead and lead oxide |
| Total patents | 25 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 4 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Lead-acid battery
US-12463221-B2 · Nov 4, 2025 · US
Lead-lead oxide-carbon nanocomposite for energy storage cells and method of preparation
US-12176523-B2 · Dec 24, 2024 · US
Lead-lead oxide-carbon nanocomposite for energy storage cells and method of preparation
US-2023197933-A1 · Jun 22, 2023 · US
Lead-lead oxide-carbon nanocomposite for energy storage cells and method of preparation
US-11611069-B2 · Mar 21, 2023 · US
Lead-acid battery
US-2022238859-A1 · Jul 28, 2022 · US
Lead-acid battery
US-2022200007-A1 · Jun 23, 2022 · US
Recycling of lead-containing waste
US-2022081315-A1 · Mar 17, 2022 · US
Lead acid and lead carbon battery
US-2022029203-A1 · Jan 27, 2022 · US
Lead-lead oxide-carbon nanocomposite for energy storage cells and method of preparation
US-2021328210-A1 · Oct 21, 2021 · US
Carbonaceous materials for lead acid batteries
US-10862109-B2 · Dec 8, 2020 · US
High performance lead acid battery with advanced electrolyte system
US-10355316-B2 · Jul 16, 2019 · US
Polymer fiber-containing mats with additives for improved performance of lead acid batteries
US-2019148735-A1 · May 16, 2019 · US
Carbonaceous materials for lead acid batteries
US-2018269474-A1 · Sep 20, 2018 · US
Carbonaceous materials for lead acid batteries
US-9985281-B2 · May 29, 2018 · US
Electrode compositions comprising carbon additives
US-2017373312-A1 · Dec 28, 2017 · US
Carbonaceous materials for lead acid batteries
US-2016380261-A1 · Dec 29, 2016 · US
Lead-acid batteries and pastes therefor
US-9368787-B2 · Jun 14, 2016 · US
Lead-acid battery
US-9356321-B2 · May 31, 2016 · US
Carbon additives for negative electrodes
US-2016118668-A1 · Apr 28, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M4/57?
- CPC H01M4/57 is the Cooperative Patent Classification code for “of "grey lead", i.e. powders containing lead and lead oxide.”
- How many patents are filed under CPC H01M4/57 (of "grey lead", i.e. powders containing lead and lead oxide)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC H01M4/57 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).