Techno Ryowa Ltd.
Records under this name other than patents Techno Ryowa Ltd. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Showing 1 to 5 of 5 · Back to Techno Ryowa Ltd.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,397,647 | Ionized gas current emission type dust-free ionizer Lapsed on the fee record Ended Jul 8, 2016 · From the USPTO record | Lapsed on the fee record | Ended Jul 8, 2016 | From the USPTO record |
| US 7,126,807 | Ionized Air Flow Discharge Type Non-Dusting Ionizer Lapsed on the fee record Ended Oct 24, 2014 · High confidence | Lapsed on the fee record | Ended Oct 24, 2014 | High confidence |
| US 5,249,094 | Pulsed-DC ionizer Term ended Term ended no later than Sep 28, 2013 · Low confidence | Term ended | Term ended no later than Sep 28, 2013 | Low confidence |
| US 5,296,018 | Method and apparatus for eliminating electric charges in a clean room Term ended Term ended no later than Mar 22, 2014 · Low confidence | Term ended | Term ended no later than Mar 22, 2014 | Low confidence |
| US 5,847,917 | Air ionizing apparatus and method Term ended Term ended no later than Dec 8, 2018 · Low confidence | Term ended | Term ended no later than Dec 8, 2018 | Low confidence |