Film electret and an electret filter
US5256176A · kind A · utility
43Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1991 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Mar 12, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/48
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A film electret and an electret filter that contain a polar high-molecular weight compound and that provides a TSDC curve having a homocharge peak temperature of at least 95.degree. C. and a heterocharge peak temperature of at least 80.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.