Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7860585 | Heat processing apparatus, method of automatically tuning control constants, and storage medium | Goro Takahashi, Hisashi Inoue, Wenling Wang | 2010-12-28 |
| 7199139 | Medicinal compositions containing diuretic and insulin resistance-improving agent | Masaya Takaoka, Kazushi Araki | 2007-04-03 |
| 6348541 | Process for preparing a water-in-oil emulsion | Takeshi Narita, Masahiro Ushigome, Masaharu Nagahama | 2002-02-19 |
| 5487425 | Composition and method for recovery of petroleum and gas | Takamasa Ohno, Keietsu Kato, Yoshiyuki Yamaguchi, Masami Murakami, Shogo Suzuki +1 more | 1996-01-30 |
| 5296577 | Process for producing acrylamide polymer | Hitoshi Tamura, Teruzo Otsuka, Masaharu Nagahama | 1994-03-22 |
| 5185393 | Water-in-oil emulsion of cationic polymer | Takeshi Narita, Masahiro Ushigome, Masaharu Nagahama | 1993-02-09 |
| 4810786 | Stabilization of xanthan gum in aqueous solution | Zengiro Kawamura | 1989-03-07 |
| 4721577 | Stabilized fracturing fluid and method of stabilizing fracturing fluid | Makoto Yanagita, Yukihiko Sekimoto | 1988-01-26 |
| 4691013 | Process for production of modified hydroxyethyl cellulose | Yukihiko Sekimoto, Makoto Yanagita | 1987-09-01 |
| 4681690 | Stabilized fracturing fluid and method of stabilizing fracturing fluid | Makoto Yanagita, Yukihiko Sekimoto | 1987-07-21 |
| 4661266 | Completion and workover fluids | Makoto Yanagita, Yukihiko Sekimoto | 1987-04-28 |
| 4614601 | Completion and workover fluids | Yukihiko Sekimoto, Makoto Yanagida | 1986-09-30 |
| 4607099 | Stabilization of xanthan gum in aqueous solution | Jun Hosoda, Zengiro Kawamura | 1986-08-19 |
| 4605505 | Drilling fluids | Makoto Yanagida, Yukihiko Sekimoto | 1986-08-12 |
| 4481316 | Method for inhibiting the degradation of an aqueous solution of an acrylamide polymer in a petroleum recovery process | Gengiro Kawamura | 1984-11-06 |
| 4393163 | Method for stabilizing an acrylamide polymer in a petroleum recovery process | Gengiro Kawamura | 1983-07-12 |
| 4317759 | Stabilized aqueous solutions of acrylamide polymers | Toshikazu Oda, Yasunosuke Tanabe, Takeshi Arai | 1982-03-02 |