Lead-acid battery
US-2022344662-A1 · Oct 27, 2022 · US
Expanders for lead-acid accumulators
Expanders for lead-acid accumulators · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M4/627 |
| Official title | {Expanders for lead-acid accumulators} |
| Display label | Expanders for lead-acid accumulators |
| Total patents | 92 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 7 |
| 2017 | 5 |
| 2018 | 7 |
| 2019 | 7 |
| 2020 | 11 |
| 2021 | 4 |
| 2022 | 14 |
| 2023 | 9 |
| 2024 | 9 |
| 2025 | 9 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Lead-acid battery
US-2022344668-A1 · Oct 27, 2022 · US
Core-shell particles based on red lead for lead-acid batteries
US-2022310987-A1 · Sep 29, 2022 · US
Lead-acid battery
US-11424452-B2 · Aug 23, 2022 · US
Absorbent glass mat battery
US-11411280-B2 · Aug 9, 2022 · US
Secondary battery
US-2022247047-A1 · Aug 4, 2022 · US
Lead-acid battery
US-2022238859-A1 · Jul 28, 2022 · US
Lead-acid battery
US-2022200007-A1 · Jun 23, 2022 · US
Lead-acid battery
US-11367906-B2 · Jun 21, 2022 · US
Secondary battery
US-11342640-B2 · May 24, 2022 · US
Method of producing electrode, method of producing battery, electrode, and battery
US-2022131123-A1 · Apr 28, 2022 · US
Organic expander for lead storage battery
US-11251434-B2 · Feb 15, 2022 · US
Compositions, electrodes and lead-acid batteries having improved low-temperature performance
US-2022020998-A1 · Jan 20, 2022 · US
Negative mass for lead-acid battery electrodes and lead-acid battery including same
US-2021336249-A1 · Oct 28, 2021 · US
Organic expander for lead storage battery
US-2021265635-A1 · Aug 26, 2021 · US
Lead-acid battery
US-2021249699-A1 · Aug 12, 2021 · US
Negative electrode plate for lead-acid battery and lead-acid battery
US-2021036308-A1 · Feb 4, 2021 · US
Carbonaceous materials for lead acid batteries
US-10862109-B2 · Dec 8, 2020 · US
Lead-acid battery
US-10790501-B2 · Sep 29, 2020 · US
Method of manufacturing electrode
US-2020274165-A1 · Aug 27, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M4/627?
- CPC H01M4/627 is the Cooperative Patent Classification code for “Expanders for lead-acid accumulators.”
- How many patents are filed under CPC H01M4/627 (Expanders for lead-acid accumulators)?
- Our database includes 92 publications tagged with this CPC code.
- Is patent activity under CPC H01M4/627 growing?
- Publication counts under this code: 9 in 2024 vs 9 in 2025 (latest complete years).