Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6861039 | Method for purification of phosphoric acid high purity polyphosphoric acid | Kiyoshi Hotta | 2005-03-01 |
| 6617414 | Aromatic diamine/aromatic dicarboxylate and production method thereof | Kiyoshi Hotta | 2003-09-09 |
| 6335419 | Polybenzazole and fiber thereof | Go Matsuoka | 2002-01-01 |
| 6169165 | Method for producing polybenzazole | Masahiko Fukushima, Makiko Koyama | 2001-01-02 |
| 5919890 | Method for production of polybenzazole | Kiyoshi Hotta, Yoshio Araki, Masakatsu Ohguchi | 1999-07-06 |
| 5911908 | Method of stabilizing 4,6-diaminoresorcinol and salt thereof | Go Matsuoka | 1999-06-15 |