SL Surface Technologies, Inc.
Records under this name other than patents SL Surface Technologies, Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Back to SL Surface Technologies, Inc.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 6,785,151 | Quasi-synchronous, magnetic amplifier regulated dc-dc converter Term ended Term ended Mar 14, 2023 · From the USPTO record | Term ended | Term ended Mar 14, 2023 | From the USPTO record |
| US 6,624,997 | Electrical power conditioner Formerly held Term ended Term ended Jun 27, 2021 · From the USPTO record | Term ended | Term ended Jun 27, 2021 | From the USPTO record |
| US 6,330,169 | Converter output regulation via channel resistance modulation of synchronous rectifiers Formerly held Term ended Term ended Feb 23, 2021 · High confidence | Term ended | Term ended Feb 23, 2021 | High confidence |
| US 6,069,804 | Bi-directional dc-to-dc power converter Term ended Term ended Jul 23, 2019 · From the USPTO record | Term ended | Term ended Jul 23, 2019 | From the USPTO record |
| US 6,535,369 | Adaptive surge suppressor Formerly held Lapsed on the fee record Ended Mar 18, 2015 · From the USPTO record | Lapsed on the fee record | Ended Mar 18, 2015 | From the USPTO record |
| US 6,137,251 | Brushless DC motor controller with speed control from zero to above based speed Lapsed on the fee record Ended Oct 24, 2008 · From the USPTO record | Lapsed on the fee record | Ended Oct 24, 2008 | From the USPTO record |
| US 4,551,782 | Method and apparatus for degaussing magnetic storage media Term ended Term ended no later than Nov 5, 2005 · Low confidence | Term ended | Term ended no later than Nov 5, 2005 | Low confidence |
| US 4,939,617 | Method and apparatus for monitoring an AC transmission line Term ended Term ended no later than Jul 3, 2010 · Low confidence | Term ended | Term ended no later than Jul 3, 2010 | Low confidence |
| US 4,999,594 | AC line filter with tapped balun winding Term ended Term ended no later than Mar 12, 2011 · Low confidence | Term ended | Term ended no later than Mar 12, 2011 | Low confidence |
| US 5,012,382 | Low impedance power conditioner apparatus and method Term ended Term ended no later than Apr 30, 2011 · Low confidence | Term ended | Term ended no later than Apr 30, 2011 | Low confidence |