Nondestructive testing of HEPA filters
US4213768A · kind A · utility
11Cited by
8References
9Claims
0Family size
Inventors
Key dates
| Filing date | Nov 27, 1978 |
| Grant date | Jul 22, 1980 |
| Priority date | — |
| Expiry date | Nov 27, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2279/51
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Method is provided for non-destructively testing the integrity of a high efficiency particulate air filters using conventional equipment with a novel testing medium comprising an aerosol of hydrophobic-surfaced particles, which is non-toxic, efficient in measuring filter integrity, unaffected by moisture and temperature conditions and non-coating of optics used in measuring, whereby more accurate measuring of HEPA filter condition is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.