Assignee
- Sagami Chemical Research Center
- Central Glass Company, Limited
- Hodogaya Chemical Co.
- Nippon Soda Co.
- Nissan Chemical Industries
- Tosoh
Inventors
- Yo Kobayashi (13 patents)
- Muneki Omori (1 patents)
- Chikako Yamada (4 patents)
US Patent 5188829 · Granted Feb 23, 1993