Term ends Aug 23, 2039 · High confidence
20-year base term ends Aug 23, 2039
Filed Oct 31, 2019 as application 16/670,586 · Granted Feb 15, 2022
Base term, 20 years from filing
Today
2019
2039
Clock starts
Aug 23, 2019
Aug 23, 2019
Term ends
Aug 23, 2039
Aug 23, 2039
Granted
Feb 15, 2022
Feb 15, 2022
base term
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.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
13
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 is its 20-year base term, with no adjustment for prosecution delay. 1 of 3 maintenance fees is 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 Aug 23, 2019, when application PCT/CN2019/102116, the earliest non-provisional in its chain, was filed (this one was filed Oct 31, 2019) | Aug 23, 2039 | 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 23, 2039 | High confidence |
This family
| US 11,251,195 | this patent Aug 2039 | Aug 2039 |
| US 11,183,512 | In force Nov 2039 | Nov 2039 |
| US 11,094,712 | In force Sep 2039 | Sep 2039 |
| US 11,114,458 | In force Sep 2039 | Sep 2039 |
| US 11,765,897 | In force May 2040 | May 2040 |
| US 11,716,850 | In force May 2040 | May 2040 |
| US 11,963,356 | In force no later than Feb 2040 | no later than Feb 2040 |
| US 12,701,706 | In force Sep 2039 | Sep 2039 |
8 of 13 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 1, 2019 Reel 50889, frame 424 | Huo, Zongliang; Yang, Haohao; Xu, Wei; Yan, Ping; Huang, Pan; Zhou, Wenbin | Yangtze Memory Technologies Co., Ltd. | 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
Aug 2039
Term ends Aug 23, 2039. Maintenance fees still fall due before then
Citations
2
later US patents cite this one
That is above the median of utility patents granted in 2022 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.