Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5888434 | Process for making a microporous membrane from a blend containing a poly (phenylene sulfide) polymer, an amorphous polymer, and optionally a solvent | Jiro Kawamoto, Richard A. Lundgard, Mark F. Sonnenschein, Hawk S. Wan, H. Nelson Beck | 1999-03-30 |
| 5246647 | Process of making microporous hollow fiber or film membrane of poly(phenylene sulfide) (PPS) | Henry N. Beck, Hawk S. Wan, Chieh-Chun Chau, Timothy M. Finney, Ritchie A. Wessling +2 more | 1993-09-21 |
| 5227101 | Process of making microporous membranes from poly(etheretherketone)-type polymers and low melting point crystallizable polymers | H. Nelson Beck, Richard A. Lundgard, Hawk S. Wan, Jiro Kawamoto, Mark F. Sonnenschein | 1993-07-13 |
| 5205968 | Process for making a microporous membrane from a blend containing a poly(etheretherketone)-type polymer, an amorphous polymer, and a solvent | Paul A. Damrow, H. Nelson Beck, Mark F. Sonnenschein | 1993-04-27 |
| 5200078 | Microporous membranes from poly(etheretherketone)-type polymers | Henry N. Beck, Richard A. Lundgard | 1993-04-06 |
| 5064580 | Process for making microporous membranes from poly(etheretherketone)-type polymers | Henry N. Beck, Richard A. Lundgard | 1991-11-12 |
| 5015275 | Isotropic microporous syndiotactic polystyrene membranes and processes for preparing the same | Henry N. Beck, Hawk S. Wan, Richard A. Lundgard | 1991-05-14 |
| 5013339 | Compositions useful for making microporous polyvinylidene fluoride membranes, and process | Richard A. Lundgard | 1991-05-07 |
| 5011637 | Preparing cellulose ester membranes for gas separation | Dana Overman, Jee I. Kau | 1991-04-30 |
| 4980063 | Compositions useful for preparing cellulose ester membranes for liquid separations | Jee I. Kau, Roger B. Hornby, Ernest A. Sharer | 1990-12-25 |
| 4980101 | Anisotropic microporous syndiotactic polystyrene membranes and a process for preparing the same | Henry N. Beck, Hawk S. Wan, Richard A. Lundgard | 1990-12-25 |
| 4976901 | Microporous membranes from isotactic polystyrene and syndiotactic polystyrene | Henry N. Beck | 1990-12-11 |
| 4927535 | Microporous membranes from isotactic polystyrene and syndiotactic polystyrene | Henry N. Beck | 1990-05-22 |
| 4543221 | Method for making cellulose semipermeable hollow fibers | David Chen | 1985-09-24 |
| 4276173 | Cellulose acetate hollow fiber and method for making same | Michael Kell | 1981-06-30 |