Dowell, a division of Schlumberger Technology Corporation
Records under this name other than patents Dowell, a division of Schlumberger Technology Corporation holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Back to Dowell, a division of Schlumberger Technology Corporation
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 6,177,385 | Metal ion crosslinked fracturing fluid and method Term ended Term ended Sep 27, 2015 · From the USPTO record | Term ended | Term ended Sep 27, 2015 | From the USPTO record |
| US 5,417,291 | Drilling connector Term ended Term ended no later than May 23, 2015 · Low confidence | Term ended | Term ended no later than May 23, 2015 | Low confidence |
| US 5,431,219 | Forming casing window off whipstock set in cement plug Term ended Term ended no later than Jul 11, 2015 · Low confidence | Term ended | Term ended no later than Jul 11, 2015 | Low confidence |
| US 5,439,055 | Control of particulate flowback in subterranean wells Term ended Term ended no later than Aug 8, 2015 · Low confidence | Term ended | Term ended no later than Aug 8, 2015 | Low confidence |
| US 5,445,223 | Delayed borate crosslinked fracturing fluid having increased temperature range Term ended Term ended no later than Aug 29, 2015 · Low confidence | Term ended | Term ended no later than Aug 29, 2015 | Low confidence |
| US 5,488,989 | Whipstock orientation method and system Term ended Term ended no later than Feb 6, 2016 · Low confidence | Term ended | Term ended no later than Feb 6, 2016 | Low confidence |
| US 5,501,275 | Control of particulate flowback in subterranean wells Term ended Term ended no later than Mar 26, 2016 · Low confidence | Term ended | Term ended no later than Mar 26, 2016 | Low confidence |
| US 5,503,671 | High temperature retarders for oil field cements, cement slurries and corresponding cementing processes Term ended Term ended no later than Apr 2, 2016 · Low confidence | Term ended | Term ended no later than Apr 2, 2016 | Low confidence |
| US 5,503,672 | High temperature retarders for oil field cements, cement slurries and corresponding cementing processes Term ended Term ended no later than Apr 2, 2016 · Low confidence | Term ended | Term ended no later than Apr 2, 2016 | Low confidence |
| US 5,507,341 | Inflatable packer with bladder shape control Term ended Term ended no later than Apr 16, 2016 · Low confidence | Term ended | Term ended no later than Apr 16, 2016 | Low confidence |