Four patents currently held, every record listed here
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
The next term ends in Mar 2038. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Mar 2038
Next term end
4
Patent families
When these terms end
Each bar runs from grant to computed term end. 2019 to 2039.20232027203120352039
4 pending applications: term is not computable until grant.Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Jan 2039 · High confidence
Also notable
Ends Mar 2038 · High confidence
Also notable
Ends Oct 2038 · High confidence
L-Shaped Plasma Confinement Ring for Plasma Chambers
US 11,127,572
The newest of the three, granted 2021. It anchors the portfolio to 2039, later than anything else here.
Growth of a Shaped Silicon Ingot by Feeding Liquid onto a Shaped Ingot
US 10,415,149
The earliest of the three still in force, granted 2019 and renewed since. Its term ends first, in 2038.
Furnace for Casting Near-Net Shape (NNS) Silicon
US 10,724,796
Granted 2020. Computed term ends 2038.
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 Mar 17, 2027The maintenance fee for Growth of a Shaped Silicon Ingot by Feeding Liquid onto a Shaped Ingot (US 10,415,149) comes due Mar 17, 2027. Unpaid by Sep 17, 2027, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 3 largest of its 4 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Crucible for Casting Near-Net Shape (NNS) Silicon | 1 in force | to Mar 2039 |
| L-Shaped Plasma Confinement Ring for Plasma Chambers | 1 in force | to Jan 2039 |
| Furnace for Casting Near-Net Shape (NNS) Silicon | 1 in force | to Oct 2038 |
Patents held now
Soonest term end first.
Showing 1 to 4 of 4
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 10,415,149 | Growth of a Shaped Silicon Ingot by Feeding Liquid onto a Shaped Ingot In force · High confidence | In force | High confidence | |
| US 10,724,796 | Furnace for Casting Near-Net Shape (NNS) Silicon In force · High confidence | In force | High confidence | |
| US 11,127,572 | L-Shaped Plasma Confinement Ring for Plasma Chambers In force · High confidence | In force | High confidence | |
| US 11,001,529 | Crucible for Casting Near-Net Shape (NNS) Silicon In force · High confidence | In force | High confidence |
Also on record, not counted in the 4: 4 applications pending · 4 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.