308 patents currently held
25 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.
The next term ends in Apr 2029. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
112
Ending by 2030
Apr 2029
Next term end
19
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 Sep 2037 · High confidence
Also notable
Ends Sep 2036 · High confidence
Also notable
Ends Mar 2035 · High confidence
3D Semiconductor Device and Structure
US 10,991,675
Cited by 113 later US patents, top 1% of utility patents granted in 2021 in our data. Protection runs to 2037.
A Multilevel Semiconductor Device and Structure with Memory
US 10,515,981
The most cited patent in this portfolio, cited by 126 later US patents, top 5% of utility patents granted in 2019 in our data. Protection runs to 2036.
A 3D Semiconductor Wafer, Devices, and Structure
US 10,658,358
Cited by 94 later US patents, top 5% of utility patents granted in 2020 in our data. Protection runs to 2035.
Formerly held, still cited
Notable
Ends Apr 2029 · High confidence
The most cited patent in this portfolio, cited by 157 later US patents, top 5% of utility patents granted in 2013 in our data. Protection runs to 2029. A terminal disclaimer caps this term to an earlier patent's.
now held by Samsung Electronics 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.
- 3 fees due Nov 14 to 21, 2026 · next Nov 14
- 5 fees due Dec 6 to 20, 2026 · next Dec 6
- 4 fees due Jan 4 to 30, 2027 · next Jan 4
- 7 fees due Feb 4 to 22, 2027 · next Feb 4
- 4 fees due Mar 12 to 19, 2027 · next Mar 12
- 6 fees due Apr 10 to 30, 2027 · next Apr 10
- 2 fees due May 7 to 28, 2027 · next May 7
- 8 fees due Jun 3 to 30, 2027 · next Jun 3
- 6 fees due Jul 2 to 23, 2027 · next Jul 2
- 5 fees due Aug 2 to 27, 2027 · next Aug 2
- 9 fees due Sep 5 to 29, 2027 · next Sep 5
- 6 fees due Oct 5 to 23, 2027 · next Oct 5
- 2 fees due Nov 7 to 12, 2027 · next Nov 7
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
What they patent
The 5 largest of its 19 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| 3D Semiconductor Device | 119 in force | to Dec 2032 |
| Semiconductor Device and Structure | 30 in force | to Dec 2036 |
| Novel Semiconductor Device and Structure | 24 in force | to Apr 2033 |
| Semiconductor Device, Structure and Methods | 22 in force | to Mar 2035 |
| 3D Semiconductor Device and Structure | 18 in force | to Oct 2040 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,642,416 | Method of Forming Three Dimensional Integrated Circuit Devices Using Layer Transfer Technique In force (reinstated) · Medium confidence | In force (reinstated) | Medium confidence | |
| US 8,669,778 | Method for Design and Manufacturing of a 3D Semiconductor Device In force · High confidence | In force | High confidence | |
| US 8,993,385 | Method to Construct a 3D Semiconductor Device In force · High confidence | In force | High confidence | |
| US 9,099,526 | An Integrated Circuit Device and Structure In force · High confidence | In force | High confidence | |
| US 9,853,089 | Semiconductor Device and Structure In force · High confidence | In force | High confidence | |
| US 9,887,203 | 3D Semiconductor Device and Structure In force · High confidence | In force | High confidence | |
| US 9,953,925 | Novel Semiconductor System and Device In force · High confidence | In force | High confidence | |
| US 9,953,972 | Semiconductor System, Device and Structure In force · High confidence | In force | High confidence | |
| US 10,157,909 | 3D Semiconductor Device and Structure In force · Medium confidence | In force | Medium confidence | |
| US 10,366,970 | 3D Semiconductor Device and Structure In force (reinstated) · High confidence | In force (reinstated) | High confidence |
Also on record, not counted in the 308: 25 patents in force now held by others · 73 patents ended · 29 applications pending · 55 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.