Lapsed Dec 29, 2023 on the fee record · High confidence
20-year base term ended Sep 1, 2026
Second maintenance fee unpaid; grace period ended.
Held by Wi-Lan Inc.
Filed Aug 20, 2015 as application 14/831,525 · Granted Dec 29, 2015
Base term, 20 years from filing
Today
Lapsed Dec 29, 2023
2006
2026
Clock starts
Sep 1, 2006
Sep 1, 2006
No longer in force
Dec 29, 2023
Dec 29, 2023
Granted
Dec 29, 2015
Dec 29, 2015
Term would have run to
Sep 1, 2026
Sep 1, 2026
base term
after the term ends
fee events
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,259,688, to Sep 1, 2026. The term already ends on or before that date, so the cap shortened nothing.
1 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
9
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Sep 1, 2026: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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, 2006, when application 11/469,794, the earliest non-provisional in its chain, was filed (this one was filed Aug 20, 2015) | Sep 1, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,259,688) | resolves to Sep 1, 2026, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 2 maintenance fees paid | lapsed Dec 29, 2023 | High confidence |
| Computed term end | The steps above, in order | Dec 29, 2023 | High confidence |
This family
| US 8,259,688 | In force May 2030 | May 2030 |
| US 8,229,437 | Term ended Sep 2026 | Sep 2026 |
| US 8,532,052 | Term ended Sep 2026 | Sep 2026 |
| US 9,332,572 | Term ended Sep 2026 | Sep 2026 |
| US 9,226,320 | this patent Dec 2023 | Dec 2023 |
| US 9,380,607 | Term ended Sep 2026 | Sep 2026 |
| US 10,805,131 | Term ended Sep 2026 | Sep 2026 |
| US 10,985,956 | Term ended Sep 2026 | Sep 2026 |
8 of 9 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Nov 24, 2015 Reel 37134, frame 441 | Bourlas, Yair; Newham, Adam E.; Wang, Lei; Gummadi, Srikanth | Nextwave Broadband Inc. | Assignment of Assignor's Interest |
| Nov 24, 2015 Reel 37134, frame 911 | Nextwave Broadband Inc. | Wi-Lan Inc. | Assignment of Assignor's Interest |
| Jun 13, 2017 Reel 42694, frame 184 | Wi-Lan Inc.; Quarterhill Inc. | Quarterhill Inc. | Merger and Change of Name |
| Jun 14, 2017 Reel 42707, frame 179 | Quarterhill Inc. | Wi-Lan Inc. | 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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,259,688, ends no earlier than this term, so it caps nothing.
Citations
2
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.