Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6603091 | Cleaning device with deeply reaching plasma and assisting electrodes | Chia-Yuan Hsu, Yong-Hau Foo | 2003-08-05 |
| 6476341 | Cleaning device with deeply reaching plasma and assisting electrodes | Chia-Yuan Hsu, Yong-Hau Foo | 2002-11-05 |
| 5298578 | Use of phenothiazine derivatives to inhibit scale build up during polymerization of vinyl chloride | Raymond C. DeWald | 1994-03-29 |
| 5243000 | Process for making polyvinyl chloride using phenothiazine oligomer | Raymond C. DeWald | 1993-09-07 |
| 4960885 | Process for producing methylene bis(phenothiazines) | Raymond C. DeWald | 1990-10-02 |
| 4855424 | Phenothiazine derivatives | Raymond C. De Wald | 1989-08-08 |
| 4853446 | Phenothiazine composition for use in reactor scale prevention | Raymond C. DeWald | 1989-08-01 |
| 4629743 | Process for preparing high bulk density vinyl resins | — | 1986-12-16 |
| 4607058 | Process for preparing high bulk density vinyl resins | — | 1986-08-19 |
| 4258157 | Inversion polymerization process for producing vinyl resins using coated reactors | — | 1981-03-24 |
| 4182808 | Inversion polymerization process for producing vinyl resins using a dual layer coating | — | 1980-01-08 |
| 4182809 | Inversion polymerization process for producing vinyl resins using a dual layer coating | James R. Petrillo, Teresa L. Friel, Donald E. Witenhafer | 1980-01-08 |