Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870146 | Process for producing a light color high softening point hydrocarbon resin | Yasushi Sakai, Tetsuo Fujii, Motoaki Munekata, Akio Kiyohara | 1989-09-26 |
| 4826935 | Process for gas phase polymerization of vinyl chloride | Mineo Nagano | 1989-05-02 |