Waterproof sound-transmitting membrane and electrical product
US9171535B2 · kind B2 · utility
28Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2011 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Dec 15, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Provided is a waterproof sound-transmitting membrane 1 including: a solid resin film 2 having a plurality of through holes 21 formed therein; and a treatment layer 3 having water repellency and formed on at least one of two surfaces of the resin film 2 that are opposite to each other in the thickness direction. The treatment layer 3 has openings 31 at positions corresponding to the through holes 21. The air permeability of the waterproof sound-transmitting membrane 1 is 100 seconds/100 mL or less in terms of Gurley number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.