Issued Patents All Time
Showing 25 most recent of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12370386 | Flat-fold respirator having flanges disposed on the mask body | Dean R. Duffy, Scott A. Spoo | 2025-07-29 |
| 12329994 | Respirator flow control apparatus and method | Garry J. Walker, Andrew Murphy, Desmond T. Curran, Derek A. Parkin, Mark A. J. Fernandes | 2025-06-17 |
| 12128259 | Respirator negative pressure fit check devices and methods | William A. Mittelstadt, Carl W. Raines, III, David R. Stein, Nathan A. Abel, David M. Blomberg +6 more | 2024-10-29 |
| 11612195 | Personal protection article system | Lawrence J. Ptasienski, Neal A. Rakow, Cristina U. Thomas | 2023-03-28 |
| 11278064 | Personal protection article system | Lawrence J. Ptasienski, Neal A. Rakow, Cristina U. Thomas | 2022-03-22 |
| 11130008 | Respirator flow control apparatus and method | Garry J. Walker, Andrew Murphy, Desmond T. Curran, Derek A. Parkin, Mark A. J. Fernandes | 2021-09-28 |
| 11083916 | Flat fold respirator having flanges disposed on the mask body | Dean R. Duffy, Scott A. Spoo | 2021-08-10 |
| 11052268 | Respirator negative pressure fit check devices and methods | William A. Mittelstadt, Carl W. Raines, III, David R. Stein, Nathan A. Abel, David M. Blomberg +6 more | 2021-07-06 |
| 10729186 | Personal protection article system | Lawrence J. Ptasienski, Neal A. Rakow, Cristina U. Thomas | 2020-08-04 |
| 10349686 | Determining conditions of personal protection articles against at least one criterion | Lawrence J. Ptasienski, Neal A. Rakow, Cristina U. Thomas | 2019-07-16 |
| 10137320 | Respirator flow control apparatus and method | Garry J. Walker, Andrew Murphy, Desmond T. Curran, Derek A. Parkin, Mark A. J. Fernandes | 2018-11-27 |
| 9950202 | Respirator negative pressure fit check devices and methods | William A. Mittelstadt, Carl W. Raines, III, David R. Stein, Nathan A. Abel, David M. Blomberg +3 more | 2018-04-24 |
| 9901125 | Determining conditions of personal protection articles against at least one criterion | Lawrence J. Ptasienski, Neal A. Rakow, Cristina U. Thomas | 2018-02-27 |
| 9259885 | Oriented polymeric articles and method | Raymond P. Johnston | 2016-02-16 |
| 9134471 | Oriented polymeric articles and method | Raymond P. Johnston | 2015-09-15 |
| 7955570 | Low pressure drop, highly active catalyst systems using catalytically active gold | Larry A. Brey, Gina M. Buccellato, Duane D. Fansler, Marvin E. Jones, Badri Veeraraghavan +1 more | 2011-06-07 |
| 7849856 | Respirator valve | William A. Mittelstadt, David M. Castiglione | 2010-12-14 |
| 7703179 | Microreplicated surface | Dennis E. Ferguson | 2010-04-27 |
| 7444687 | Hearing protective device that includes cellular earmuffs | Luciana M. Sato, Glaucia C. Gabas, Dean M. Remer | 2008-11-04 |
| 6923182 | Crush resistant filtering face mask | Seyed A. Angadjivand, James E. Springett | 2005-08-02 |
| 6907921 | Microchanneled active fluid heat exchanger | Raymond P. Johnston | 2005-06-21 |
| 6752889 | Contoured layer channel flow filtration media | Todd W. Johnson | 2004-06-22 |
| 6743464 | Method of making electrets through vapor condensation | Randall L. Knoll | 2004-06-01 |
| 6575165 | Apparatus and method for breathing apparatus component coupling | David Cook, Raymond Odell, Ian Thomas Petherbridge, Pierre Legare, Robert P. Lapointe +4 more | 2003-06-10 |
| 6524488 | Method of filtering certain particles from a fluid using a depth loading filtration media | Raymond P. Johnston | 2003-02-25 |