1,759 patents currently held
435 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.
13 more records may belong here and await a decision; they are not counted.
The next term ends in Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
1,087
Ending by 2030
Nov 2026
Next term end
1,715
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 Aug 2029 · High confidence
Also notable
Ends May 2031 · High confidence
Also notable
Ends Dec 2028 · High confidence
Semiconductor Package and Stacked Semiconductor Package Having the Same
US 8,299,591
Cited by 39 later US patents, top 25% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2029.
Three Dimensional Pipe Gate Nonvolatile Memory Device
US 9,000,509
Cited by 40 later US patents, top 25% of utility patents granted in 2015 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2031.
Soft Program Method in a Non-Volatile Memory Device
US 7,839,692
Renewed at every maintenance window since the 2010 grant; no more fees are due before its term ends in 2028.
Formerly held, still cited
Notable
Ends Nov 2030 · High confidence
Cited by 26 later US patents, top 25% of utility patents granted in 2013 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2030.
now held by SK Hynix Inc.
Also notable
Ends Jan 2033 · High confidence
Cited by 42 later US patents, top 25% of utility patents granted in 2015 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2033.
now held by SK Hynix Inc.
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 Dec 30, 2026
- 3 fees due Jan 14 to 21, 2027 · next Jan 14
- 1 fee due Feb 11, 2027The maintenance fee for Semiconductor Device Including a Capacitor (US 9,105,758) comes due Feb 11, 2027. Unpaid by Aug 11, 2027, it lapses early.
- 1 fee due Mar 15, 2027The maintenance fee for Temperature Sensor (US 9,134,183) comes due Mar 15, 2027. Unpaid by Sep 15, 2027, it lapses early.
- 2 fees due Apr 20 to 27, 2027 · next Apr 20
- 1 fee due May 24, 2027The maintenance fee for Semiconductor Device and Method of Manufacturing the Same (US 9,196,618) comes due May 24, 2027. Unpaid by Nov 24, 2027, it lapses early.
- 2 fees due Jun 1 to 15, 2027 · next Jun 1
- 2 fees due Aug 9 to 23, 2027 · next Aug 9
- 1 fee due Sep 1, 2027The maintenance fee for Method for Fabricating Semiconductor Device (US 9,275,904) comes due Sep 1, 2027. Unpaid by Mar 1, 2028, it lapses early.
- 3 fees due Oct 12 to 26, 2027 · next Oct 12
Recent changes
- 89 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 1,715 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Semiconductor Memory Apparatus and Method of Operating the Same | 3 in force | to Jun 2031 |
| Period Signal Generator of Semiconductor Integreated Circuit | 3 in force | to May 2031 |
| Nonvolatile Memory Device with Multiple Blocking Layers and Method of Fabricating the Same | 3 in force | to Apr 2029 |
| Semiconductor Memory Device and Method of Manufacturing the Same | 2 in force | to Jan 2032 |
| Method for Forming Patterns of Semiconductor Device by Using Mixed Assist Feature System | 2 in force | to Aug 2031 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,443,733 | Word Line Voltage Generator and Flash Memory Device Including the Same, and Method of Generating Word Line Voltage Thereof In force · High confidence | In force | High confidence | |
| US 7,466,623 | Pseudo SRAM Capable of Operating in Continuous Burst Mode and Method of Controlling Burst Mode Operation Thereof In force · High confidence | In force | High confidence | |
| US 7,898,869 | Word Line Voltage Generator and Flash Memory Device Including the Same, and Method of Generating Word Line Voltage Thereof In force · High confidence | In force | High confidence | |
| US 7,408,483 | Apparatus and Method of Generating Dbi Signal in Semiconductor Memory Apparatus In force · High confidence | In force | High confidence | |
| US 7,471,583 | Memory Device with Self Refresh Cycle Control Function In force · High confidence | In force | High confidence | |
| US 7,586,350 | Circuit and Method for Initializing an Internal Logic Unit in a Semiconductor Memory Device In force · High confidence | In force | High confidence | |
| US 7,525,337 | On-Die Termination Circuit and Method for Semiconductor Memory Apparatus In force · High confidence | In force | High confidence | |
| US 7,391,671 | Data Input Device for Use in Semiconductor Memory Device In force · High confidence | In force | High confidence | |
| US 7,420,407 | Device for Controlling Internal Voltage In force · High confidence | In force | High confidence | |
| US 7,592,217 | Capacitor with Zirconium Oxide and Method for Fabricating the Same In force · High confidence | In force | High confidence |
Also on record, not counted in the 1,759: 435 patents in force now held by others · 3,832 patents ended · 1,396 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.