Issued Patents All Time
Showing 1–25 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11590443 | System and method for making electret media | — | 2023-02-28 |
| 10617984 | Tailored multilayered nano-fibrous filtration media and method of making | — | 2020-04-14 |
| 10272375 | Filter material comprising an expanded polytetrafluoroethylene containing layer and a natural fiber containing layer | — | 2019-04-30 |
| 9587329 | Process for making a polymeric fibrous material having increased beta content | — | 2017-03-07 |
| 8152889 | Filter with EPTFE and method of forming | — | 2012-04-10 |
| 7959705 | Filter with ePTFE and method of forming | — | 2011-06-14 |
| 7896941 | Product and method of forming a gradient density fibrous filter | — | 2011-03-01 |
| 7837756 | Filter with ePTFE and method of forming | — | 2010-11-23 |
| 7687416 | Arrangement for forming a layered fibrous mat of varied porosity | — | 2010-03-30 |
| 7661540 | Method of forming spaced pleated filter material and product of same | — | 2010-02-16 |
| 7625418 | Spacer arrangement for pleated filter | — | 2009-12-01 |
| 7398887 | Product and method of forming successive layers of face-to-face adjacent media with calculated pore size | — | 2008-07-15 |
| 7390443 | Method of forming successive layers of face-to-face adjacent media with calculated pore size | — | 2008-06-24 |
| 7255723 | Crest supported filter frame assembly and method | Dennis R. Porter, Ronald Unthank | 2007-08-14 |
| 7210914 | Series apparatus for forming layered fibrous mat of differing fibers and controlled surfaces | — | 2007-05-01 |
| 7112255 | Thermobondable filter medium and border frame and method of making same | Dennis R. Porter, Paul B. Ryan | 2006-09-26 |
| 7105124 | Method, apparatus and product for manufacturing nanofiber media | — | 2006-09-12 |
| 7097684 | Method of forming combined pleated scrim and filter media materials and product of same | — | 2006-08-29 |
| 6908294 | Apparatus for forming a layered fibrous mat of varied porosity | — | 2005-06-21 |
| 6758878 | Thermobondable filter medium and border frame and method of making same | Dennis R. Porter, Paul B. Ryan | 2004-07-06 |
| 6736914 | Series arrangement for forming layered fibrous mat of differing fibers and controlled surfaces | — | 2004-05-18 |
| 6652748 | Treated filter media and frame | — | 2003-11-25 |
| 6596205 | Arrangement for forming a layered fibrous mat of varied porosity | — | 2003-07-22 |
| 6409864 | Method of assembly of pleated filter with spacer insert | — | 2002-06-25 |
| 6398839 | Pleated fluid filter medium frame | Dennis R. Porter, Ronald E. Braswell | 2002-06-04 |