Enhanced Drilling As
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
1
Ending by 2030
Apr 2029
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.
- 1 fee due Dec 23, 2026The maintenance fee for Riserless, Pollutionless Drilling System (US 9,062,498) comes due Dec 23, 2026. Unpaid by Jun 23, 2027, it lapses early.
- 1 fee due Jun 29, 2027The maintenance fee for Systems and methods for subsea drilling (US 9,222,311) comes due Jun 29, 2027. Unpaid by Dec 29, 2027, it lapses early.
- 1 fee due Aug 6, 2027The maintenance fee for Multi-mode pumped riser arrangement and methods (US 11,891,861) comes due Aug 6, 2027. Unpaid by Feb 7, 2028, it lapses early.
- 1 fee due Oct 26, 2027The maintenance fee for Direct Drive Fluid Pump for Subsea Mudlift Pump Drilling Systems (US 9,322,230) comes due Oct 26, 2027. Unpaid by Apr 26, 2028, it lapses early.
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
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.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 9,222,311 | Systems and methods for subsea drilling In force · From the USPTO record | In force | From the USPTO record | |
| US 8,978,774 | System and Method for Drilling a Subsea Well In force · High confidence | In force | High confidence | |
| US 9,062,498 | Riserless, Pollutionless Drilling System In force · High confidence | In force | High confidence | |
| US 9,322,230 | Direct Drive Fluid Pump for Subsea Mudlift Pump Drilling Systems In force · High confidence | In force | High confidence | |
| US 9,428,975 | Drilling fluid pump module coupled to specially configured riser segment and method for coupling the pump module to the riser In force · From the USPTO record | In force | From the USPTO record | |
| US 9,388,653 | Method and apparatus for subsea well plug and abandonment operations In force · From the USPTO record | In force | From the USPTO record | |
| US 9,664,006 | Riser isolation device having automatically operated annular seal In force · From the USPTO record | In force | From the USPTO record | |
| US 10,787,871 | System and methods for controlled mud cap drilling In force · From the USPTO record | In force | From the USPTO record | |
| US 11,085,255 | System and methods for controlled mud cap drilling In force · From the USPTO record | In force | From the USPTO record | |
| US 11,891,861 | Multi-mode pumped riser arrangement and methods In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 17: 10 lapsed for an unpaid fee · 5 ended at full term · 1 surrendered on reissue. 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
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
1 pending