Biodegradable air filtering film and method for manufacturing same
US12410315B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Dec 10, 2021 |
| Grant date | Sep 9, 2025 |
| Priority date | — |
| Expiry date | Jun 23, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2571/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filtering film includes a porous substrate and a membrane disposed on the porous substrate. The membrane includes a plurality of fibers of one or more bio-degradable materials. The fibers have an average diameter of about 50 nm to about 3 μm. The one or more bio-degradable materials has a melt flow index of at least 5 g/10 min at 210° C. at a load of 2.16 kg.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.