8 patents currently held
172 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.
69 more records may belong here and await a decision; they are not counted.
The next term ends in Dec 2033. from the record
Of the 172 now held by other companies, 90 name GlobalWafers Co. Ltd. as their current owner, and 82 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Dec 2033
Next term end
6
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
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: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends May 2040 · High confidence
Also notable
Ends Oct 2037 · High confidence
Also notable
Ends Dec 2033 · High confidence
Methods for Producing a Single Crystal Silicon Ingot Using Boric Acid as a Dopant and Ingot Puller Apparatus That Use a Solid-Phase Dopant
US 11,585,010
The newest of the three, granted 2023. It anchors the portfolio to 2040, later than anything else here.
High Resistivity Silicon-On-Insulator Substrate Having Enhanced Charge Trapping Efficiency
US 11,239,107
Granted 2022. Computed term ends 2037.
Operation of Fluidized Bed Reactors by Optimizing Temperature Gradients via Particle Size Distribution Control
US 10,189,714
Granted 2019 and renewed at 2 of 3 maintenance windows. Protection runs to 2033. A terminal disclaimer caps this term to an earlier patent's.
Formerly held, still cited
Notable
Ends Oct 2032 · High confidence
Cited by 47 later US patents, top 10% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2032.
now held by GlobalWafers Co., Ltd.
Also notable
Ends Jan 2032 · High confidence
Cited by 62 later US patents, top 10% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032.
now held by GlobalWafers Co., Ltd.
Also notable
Ends Aug 2028 · High confidence
Cited by 33 later US patents, top 25% of utility patents granted in 2011 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
now held by GlobalWafers Co., Ltd.
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 Jan 23, 2027The maintenance fee for Methods and Systems for Preventing Unsafe Operations (US 10,361,106) comes due Jan 23, 2027. Unpaid by Jul 23, 2027, it lapses early.
Recent changes
- 5 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 6 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
Patents held now
Soonest term end first.
Showing 1 to 8 of 8
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 12,071,686 | Liner Assemblies for Substrate Processing Systems In force · High confidence | In force | High confidence | |
| US 10,189,714 | Operation of Fluidized Bed Reactors by Optimizing Temperature Gradients via Particle Size Distribution Control held by Corner Star Limited In force · High confidence | In force | High confidence | |
| US 10,361,106 | Methods and Systems for Preventing Unsafe Operations In force · High confidence | In force | High confidence | |
| US 11,239,107 | High Resistivity Silicon-On-Insulator Substrate Having Enhanced Charge Trapping Efficiency held by GlobalWafers Co., Ltd. In force · High confidence | In force | High confidence | |
| US 12,024,789 | Methods for Forming Single Crystal Silicon Ingots with Improved Resistivity Control In force · High confidence | In force | High confidence | |
| US 11,585,010 | Methods for Producing a Single Crystal Silicon Ingot Using Boric Acid as a Dopant and Ingot Puller Apparatus That Use a Solid-Phase Dopant In force · High confidence | In force | High confidence | |
| US 12,195,872 | Ingot Puller Apparatus That Use a Solid-Phase Dopant In force · High confidence | In force | High confidence | |
| US 12,435,440 | Methods for Producing a Single Crystal Silicon Ingot Using Boric Acid as a Dopant In force · High confidence | In force | High confidence |
Also on record, not counted in the 8: 172 patents in force now held by others · 142 patents ended · 1 application pending · 81 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.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.