Lapsed Jun 23, 2024 on the fee record · High confidence
20-year base term ends Mar 12, 2034
First maintenance fee unpaid; grace period ended.
Held by Linfo IP LLC
Filed May 23, 2017 as application 15/602,129 · Granted Jun 23, 2020
Base term, 20 years from filing, plus 256 days of patent term adjustment (USPTO delay)
Today
Lapsed Jun 23, 2024
2014
2034
Clock starts
Mar 12, 2014
Mar 12, 2014
No longer in force
Jun 23, 2024
Jun 23, 2024
Granted
Jun 23, 2020
Jun 23, 2020
Term would have run to
Nov 23, 2034
Nov 23, 2034
base term
patent term adjustment
after the term ends
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
256
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
Its term would have run to Nov 23, 2034: its 20-year base term plus 256 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 Mar 12, 2014, when application 14/205,380, the earliest non-provisional in its chain, was filed (this one was filed May 23, 2017) | Mar 12, 2034 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +256 days, USPTO patent term adjustment record | Nov 23, 2034 | 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 | 0 of 3 maintenance fees paid | lapsed Jun 23, 2024 | High confidence |
| Computed term end | The steps above, in order | Jun 23, 2024 | High confidence |
This family
| US 9,665,641 | In force May 2035 | May 2035 |
| US 10,691,732 | this patent Jun 2024 | Jun 2024 |
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 |
|---|---|---|---|
| Aug 9, 2021 Reel 57128, frame 500 | Zhang, Chizong; Zhang, Guangsheng | Linfo IP LLC | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 256 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
3
later US patents cite this one
That is above the median of utility patents granted in 2020 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.