Waterproofing loudspeaker cones
US7913808B2 · kind B2 · utility
6Cited by
14References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2008 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Nov 13, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A water-resistant composite paper, suitable for use as a loudspeaker component, is made from a composition including wood pulp, hydrophobic fibers, and stiffening fibers that retain stiffness when wet. In some examples, fibrillated acrylic fibers and glass fibers are used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.