Ensign Drilling Inc.
1 more in force is now held by another company
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
0
Ending by 2030
Jul 2031
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 2 fees due Mar 17 to 26, 2027 · next Mar 17
- 1 fee due Jun 30, 2027The maintenance fee for Hydraulic multi-displacement hoisting cylinder system (US 10,519,725) comes due Jun 30, 2027. Unpaid by Jan 3, 2028, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
Showing 1 to 6 of 6
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,499,854 | Rotating control device, cool fluid circulation system and methods of operation In force · From the USPTO record | In force | From the USPTO record | |
| US 10,138,723 | Autodrilling system for control of operation of a hydraulic drilling rig In force · From the USPTO record | In force | From the USPTO record | |
| US 10,415,368 | Autodrilling system for control of operation of a hydraulic drilling rig In force · From the USPTO record | In force | From the USPTO record | |
| US 10,519,725 | Hydraulic multi-displacement hoisting cylinder system In force · From the USPTO record | In force | From the USPTO record | |
| US 10,246,951 | Hydraulic Multi-Displacement Hoisting Cylinder System In force · High confidence | In force | High confidence | |
| US 11,767,749 | Inertial compensation for a quill oscillator In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 6: 1 patent in force now held by others. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
Every application published under this name has become a patent.