Element Six Limited
85 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 2 name spellings.
13
Ending by 2030
Feb 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.
- 2 fees due Nov 14 to 19, 2026 · next Nov 14
- 1 fee due Dec 4, 2026The maintenance fee for Cutting Element Incorporating a Cutting Body and Sleeve and an Earth-Boring Tool Including the Cutting Element (US 10,309,157) comes due Dec 4, 2026. Unpaid by Jun 4, 2027, it lapses early.
- 3 fees due Jan 2 to 28, 2027 · next Jan 2
- 1 fee due Feb 4, 2027The maintenance fee for Cutter structures, inserts comprising same and method for making same (US 9,095,918) comes due Feb 4, 2027. Unpaid by Aug 4, 2027, it lapses early.
- 1 fee due Mar 22, 2027The maintenance fee for Microwave power delivery system for plasma reactors (US 9,142,389) comes due Mar 22, 2027. Unpaid by Sep 22, 2027, it lapses early.
- 2 fees due Apr 1 to 15, 2027 · next Apr 1
- 2 fees due Jul 12, 2027
- 3 fees due Aug 2 to 16, 2027 · next Aug 2
- 3 fees due Sep 22 to 29, 2027 · next Sep 22
- 4 fees due Oct 5 to 30, 2027 · next Oct 5
- 1 fee due Nov 10, 2027The maintenance fee for Pick tool and assembly comprising same (US 9,334,731) comes due Nov 10, 2027. Unpaid by May 10, 2028, it lapses early.
Recent changes
- 5 terms have ended 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 8,340,341 | Coated speaker dome In force · From the USPTO record | In force | From the USPTO record | |
| US 9,567,506 | Method for manufacturing encapsulated superhard material In force · From the USPTO record | In force | From the USPTO record | |
| US D735,784 | Mill tool In force · From the USPTO record | In force | From the USPTO record | |
| US D735,785 | Mill tool In force · From the USPTO record | In force | From the USPTO record | |
| US D736,279 | Mill tool In force · From the USPTO record | In force | From the USPTO record | |
| US D736,283 | Chisel holder In force · From the USPTO record | In force | From the USPTO record | |
| US 9,555,387 | Method for manufacturing encapsulated superhard material In force · From the USPTO record | In force | From the USPTO record | |
| US 11,969,860 | Polycrystalline diamond In force · From the USPTO record | In force | From the USPTO record | |
| US 8,574,535 | Diamond In force · From the USPTO record | In force | From the USPTO record | |
| US 9,394,592 | Hard-metal body In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 84: 85 patents in force now held by others · 42 lapsed for an unpaid fee · 31 ended at full term. 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.
2 pending · 1 abandoned · 33 no status recorded