ERC Industries
Records under this name other than patents ERC Industries holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 6,484,382 | Method of providing an internal circumferential shoulder in a cylindrical passageway Formerly held Term ended Term ended Nov 17, 2020 · From the USPTO record | Term ended | Term ended Nov 17, 2020 | From the USPTO record |
| US 6,158,718 | Gate valve Term ended Term ended Sep 17, 2019 · From the USPTO record | Term ended | Term ended Sep 17, 2019 | From the USPTO record |
| US 6,176,310 | Assembly for sealing the annulus between concentric cylindrical surfaces Term ended Term ended Feb 19, 2019 · From the USPTO record | Term ended | Term ended Feb 19, 2019 | From the USPTO record |
| US 7,275,591 | Tubing hanger with ball valve in production string Formerly held Lapsed on the fee record Ended Oct 2, 2015 · From the USPTO record | Lapsed on the fee record | Ended Oct 2, 2015 | From the USPTO record |
| US 6,015,009 | Casing and tubing hanger system Lapsed on the fee record Ended Jan 18, 2004 · From the USPTO record | Lapsed on the fee record | Ended Jan 18, 2004 | From the USPTO record |
| US 6,012,519 | Full bore tubing hanger system Lapsed on the fee record Ended Jan 11, 2004 · From the USPTO record | Lapsed on the fee record | Ended Jan 11, 2004 | From the USPTO record |
| US 5,743,288 | Valve having provision for replacing stem packing while the valve is under pressure Term ended Term ended no later than Apr 28, 2018 · Low confidence | Term ended | Term ended no later than Apr 28, 2018 | Low confidence |
| US 5,746,453 | High temperature inline expansion joint Formerly held Term ended Term ended no later than May 5, 2018 · Low confidence | Term ended | Term ended no later than May 5, 2018 | Low confidence |
| US 5,908,046 | Back seat rising stem gate valve Term ended Term ended no later than Jun 1, 2019 · Low confidence | Term ended | Term ended no later than Jun 1, 2019 | Low confidence |
| US 5,951,066 | Connecting system for wellhead components Term ended Term ended no later than Sep 14, 2019 · Low confidence | Term ended | Term ended no later than Sep 14, 2019 | Low confidence |