Term ends Dec 12, 2031 · High confidence
20-year base term ends Sep 1, 2031
Held by Wistron Corporation
Filed Jan 20, 2014 as application 14/159,373 · Granted Oct 27, 2015
Base term plus 102 days of patent term adjustment (USPTO delay)
Today
2011
2031
Clock starts
Sep 1, 2011
Sep 1, 2011
Term ends
Dec 12, 2031
Dec 12, 2031
Granted
Oct 27, 2015
Oct 27, 2015
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
102
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,680,419, to Dec 12, 2031. The term already ends on or before that date, so the cap shortened nothing.
2 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
2
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 102 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 2 of 3 maintenance fees are paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 1, 2011, when application 13/223,321, the earliest non-provisional in its chain, was filed (this one was filed Jan 20, 2014) | Sep 1, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +102 days, USPTO patent term adjustment record | Dec 12, 2031 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,680,419) | resolves to Dec 12, 2031, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Dec 12, 2031 | High confidence |
This family
| US 8,680,419 | In force Feb 2032 | Feb 2032 |
| US 9,170,695 | this patent Dec 2031 | Dec 2031 |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Jan 20, 2014 Reel 32005, frame 278 | Wang, Kuei-ching; Lin, Hsing-chiao | Wistron Corporation | Assignment of Assignor's Interest |
| Jun 30, 2025 Reel 71755, frame 497 | Wistron Corporation | Mammoth Licensing, LLC | Assignment of Assignor's Interest |
| May 7, 2026 Reel 75567, frame 824 | Mammoth Licensing, LLC | Wistron Corporation | Assignment of Assignor's Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Dec 2031
Term ends Dec 12, 2031. Maintenance fees still fall due before then
Note
The 102 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,680,419, ends no earlier than this term, so it caps nothing.
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2015 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.