Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7887844 | Multiparticulate crystalline drug compositions having controlled release profiles | Leah E. Appel, Roderick J. Ray, David Keith Lyon, James B. West, Marshall Crew +3 more | 2011-02-15 |
| 7625507 | Extrusion process for forming chemically stable drug multiparticulates | Roderick J. Ray, Leah E. Appel, David D. Newbold, Dwayne T. Friesen, David Keith Lyon +3 more | 2009-12-01 |
| 7611630 | Method and device for evaluation of pharmaceutical compositions | Walter C. Babcock, Dwayne T. Friesen | 2009-11-03 |
| 6986844 | Solvent-resistant microporous polybenzimidazole membranes and modules | Robert P. Barss, Dwayne T. Friesen, Kendall R. Pearson, Roderick J. Ray, Delores R. Sidwell +1 more | 2006-01-17 |
| 6984403 | Azithromycin dosage forms with reduced side effects | Timothy Hagen, Julian B. Lo, Avinash Thombre, Scott M. Herbig, Leah E. Appel +4 more | 2006-01-10 |
| 6793820 | Ethylene-vinyl alcohol hollow fiber membranes | Dwayne T. Friesen, Delores R. Sidwell, David K. Lyon, Daichi Sakashita | 2004-09-21 |
| 6623639 | Solvent-resistant microporous polybenzimidazole membranes | Robert P. Barss, Dwayne T. Friesen, Kendall R. Pearson, Roderick J. Ray, Delores R. Sidwell +1 more | 2003-09-23 |
| 6059857 | Ultrapurification of organic solvents | Roderick J. Ray, David D. Newbold, Dwayne T. Friesen, Lori A. Ray | 2000-05-09 |
| 5843209 | Vapor permeation system | Roderick J. Ray, David D. Newbold, Dwayne T. Friesen | 1998-12-01 |
| 5753008 | Solvent resistant hollow fiber vapor permeation membranes and modules | Dwayne T. Friesen, David D. Newbold, Roderick J. Ray | 1998-05-19 |
| 5725769 | Solvent-resistant microporous polymide membranes | Warren K. Miller, Dwayne T. Friesen | 1998-03-10 |
| 5681433 | Membrane dehydration of vaporous feeds by countercurrent condensable sweep | Dwayne T. Friesen, David D. Newbold, Roderick J. Ray | 1997-10-28 |
| 5611842 | Organic and inorganic vapor permeation by countercurrent condensable sweep | Dwayne T. Friesen, David D. Newbold, Roderick J. Ray | 1997-03-18 |
| 5582725 | Chlorine-resistant composite membranes with high organic rejection | Dwayne T. Friesen, Robert P. Barss, Leslie D. Nelson | 1996-12-10 |
| 5476590 | Hydrophilic polyvinylidene fluoride membranes | Daniel J. Brose, Dwayne T. Friesen, James Russell Lowell, John M. Radovich | 1995-12-19 |
| 5464540 | Pervaporation by countercurrent condensable sweep | Dwayne T. Friesen, David D. Newbold, Roderick J. Ray | 1995-11-07 |
| 5236474 | Membrane-based removal of condensable vapors | Richard W. Schofield, David D. Newbold, Dwayne T. Friesen, Roderick J. Ray | 1993-08-17 |
| 5108464 | Countercurrent dehydration by hollow fibers | Dwayne T. Friesen, Roderick J. Ray, David D. Newbold | 1992-04-28 |
| 4978455 | P-xylylenediamide/diimide composite RO membranes | — | 1990-12-18 |
| 4900502 | Hollow fiber annealing | Walter C. Babcock, Edward Dennis LaChapelle, Kris A. Krichko | 1990-02-13 |
| 4876009 | Tetrakis-amido high flux membranes | — | 1989-10-24 |
| 4853122 | P-xylylenediamide/diimide composite RO membranes | — | 1989-08-01 |