Alkaline Battery Separator Controlled Pore Size Patent
Summary
The European Patent Office published patent EP3688829A1 for SWM Luxembourg Sarl, covering alkaline battery separators with controlled pore size technology. The patent was filed by inventor Stéphane Derrien and classified under multiple H01M battery technology categories. The patent is designated for 36 European member states.
What changed
The EPO granted patent EP3688829A1 to SWM Luxembourg Sarl for alkaline battery separators having controlled pore size. The patent covers cellulose-based separator materials (C08L 1/02) used in battery applications with multiple H01M classifications including H01M 50/44, 50/414, 50/429, 50/489, and 50/494. The designated states cover all major European patent convention members including Germany, France, UK, Italy, Spain, and 30 others.
Battery separator manufacturers and companies developing alkaline battery products should review this patent to assess potential licensing requirements or design-around opportunities. No immediate compliance actions are required, but IP departments should catalog this patent for freedom-to-operate analysis when developing new battery separator technologies.
What to do next
- Review patent claims for potential licensing implications
- Update IP portfolio monitoring to track this patent
- Conduct freedom-to-operate analysis for battery separator products
Source document (simplified)
ALKALINE BATTERY SEPARATORS HAVING CONTROLLED PORE SIZE
Publication EP3688829A1 Kind: A1 Mar 25, 2026
Applicants
SWM Luxembourg Sarl
Inventors
DERRIEN, Stéphane
IPC Classifications
C08L 1/02 20060101AFI20260128BHEP H01M 50/44 20210101ALI20260128BHEP H01M 50/414 20210101ALI20260128BHEP H01M 50/429 20210101ALI20260128BHEP H01M 50/489 20210101ALI20260128BHEP H01M 50/494 20210101ALI20260128BHEP
Designated States
AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR
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