Lapsed Feb 11, 2026 on the fee record · High confidence
20-year base term ends Jul 7, 2029
Third maintenance fee unpaid; grace period ended.
Held by Zte Corporation
Filed Nov 7, 2011 as application 13/259,573 · Granted Feb 11, 2014
Base term, 20 years from filing, plus 61 days of patent term adjustment (USPTO delay)
Today
Lapsed Feb 11, 2026
2009
2029
Clock starts
Jul 7, 2009
Jul 7, 2009
No longer in force
Feb 11, 2026
Feb 11, 2026
Granted
Feb 11, 2014
Feb 11, 2014
Term would have run to
Sep 6, 2029
Sep 6, 2029
base term
patent term adjustment
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
61
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
38
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 6, 2029: its 20-year base term plus 61 days of term adjustment for prosecution delay. 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 Jul 7, 2009, when application PCT/CN2009/072674, the earliest non-provisional in its chain, was filed (this one was filed Nov 7, 2011) | Jul 7, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +61 days, USPTO patent term adjustment record | Sep 6, 2029 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | lapsed Feb 11, 2026 | High confidence |
| Computed term end | The steps above, in order | Feb 11, 2026 | High confidence |
This family
| US 8,837,614 | Lapsed on the fee record Sep 2022 | Sep 2022 |
| US 8,648,691 | this patent Feb 2026 | Feb 2026 |
| Application 13/259,524 | Abandoned not computed | not computed |
| US 8,615,269 | Lapsed on the fee record Dec 2021 | Dec 2021 |
| US 8,711,722 | In force Aug 2030 | Aug 2030 |
| US 9,344,926 | Lapsed on the fee record May 2024 | May 2024 |
| Application 13/576,370 | Abandoned not computed | not computed |
| US 8,774,645 | Lapsed on the fee record Jul 2026 | Jul 2026 |
8 of 38 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 |
|---|---|---|---|
| Mar 2, 2012 Reel 27799, frame 776 | Zuo, Ziqiang; Wang, Shuqi; Yao, Lingling | Zte 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
Note
The 61 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
7
later US patents cite this one
That is above the median of utility patents granted in 2014 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.