Foam compositions with enhanced sound attenuation
US8327973B2 · kind B2 · utility
16Cited by
44References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2010 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Nov 17, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed are foam compositions with enhanced sound attenuation characteristics for use in earpieces, for example, user-disposable foam members such as foam tips for sound control devices including sound transmission devices and earplugs in which a relationship between the size of the pores and the volume of the cells of the polymeric may be controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.