Filter media and methods of manufacture
US7473265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2004 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Aug 13, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2250/0023
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Filters and method of manufacturing filters are disclosed herein. The filter has a substantially sack-like shape having a closed distal end and an open proximal end. The filter can be constructed from thin film. The filter material can be an organic or inorganic polymer. In one embodiment, the filter material is a polyurethane film having a thickness of les than 25 μm. The filter can be constructed from one or more sections of filter material. In the two-section embodiment, the outer edges of the first and second sections are overlapped and bonded using solvent, heat or other bonding process. In the single-section embodiment, the outer edges of the first section are overlapped and bonded using bonding agents, such as solvent or adhesive, heat or other bonding process. Filters of the present invention have a reduced amount of hysteresis so as to reform to its original shape when deployed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.