Powerspan Corp.
Records under this name other than patents Powerspan Corp. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 6,117,403 | Barrier discharge conversion of Hg, SO.sub.2 and NOx Term ended Term ended Dec 29, 2018 · From the USPTO record | Term ended | Term ended Dec 29, 2018 | From the USPTO record |
| US 6,991,771 | NOx, Hg, and SO2 removal using ammonia Lapsed on the fee record Ended Jan 31, 2018 · From the USPTO record | Lapsed on the fee record | Ended Jan 31, 2018 | From the USPTO record |
| US 7,399,453 | Discharge reactor fuse link Lapsed on the fee record Ended Jul 15, 2016 · From the USPTO record | Lapsed on the fee record | Ended Jul 15, 2016 | From the USPTO record |
| US 8,092,270 | Tubulation-free gas filled electrode or lamp Lapsed on the fee record Ended Jan 10, 2016 · From the USPTO record | Lapsed on the fee record | Ended Jan 10, 2016 | From the USPTO record |
| US 8,071,043 | Electrode cap for electrical discharge reactor Lapsed on the fee record Ended Dec 6, 2015 · From the USPTO record | Lapsed on the fee record | Ended Dec 6, 2015 | From the USPTO record |
| US 6,605,263 | Sulfur dioxide removal using ammonia Lapsed on the fee record Ended Aug 12, 2015 · From the USPTO record | Lapsed on the fee record | Ended Aug 12, 2015 | From the USPTO record |
| US 7,052,662 | NOx, Hg, and SO2 removal using alkali hydroxide Lapsed on the fee record Ended May 30, 2014 · From the USPTO record | Lapsed on the fee record | Ended May 30, 2014 | From the USPTO record |
| US 7,048,899 | Removing NOx, SO2, and Hg from a gas stream using limestone regeneration Lapsed on the fee record Ended May 23, 2014 · From the USPTO record | Lapsed on the fee record | Ended May 23, 2014 | From the USPTO record |
| US 6,936,231 | NOx, Hg, and SO2 removal using ammonia Lapsed on the fee record Ended Aug 30, 2013 · From the USPTO record | Lapsed on the fee record | Ended Aug 30, 2013 | From the USPTO record |
| US 6,132,692 | Barrier discharge conversion of SO.sub.2 and NOx to acids Lapsed on the fee record Ended Oct 17, 2012 · From the USPTO record | Lapsed on the fee record | Ended Oct 17, 2012 | From the USPTO record |