Term ends Oct 6, 2041 · Medium confidence
20-year base term ends Nov 18, 2040
Why Medium: A parent in the chain could not be resolved.
Held by Zenflow, Inc.
Filed Dec 21, 2023 as application 18/392,316 · Granted Aug 18, 2026
Base term plus 322 days of patent term adjustment (USPTO delay)
Today
2020
2041
Clock starts
Nov 18, 2020
Nov 18, 2020
Term ends
Oct 6, 2041
Oct 6, 2041
Granted
Aug 18, 2026
Aug 18, 2026
base term
patent term adjustment
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
322
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.
This patent's term runs 322 days past its 20-year base term on prosecution delay. 0 of 3 maintenance fees are paid so far. Confidence: Medium. 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 Nov 18, 2020, when application 16/951,256, the earliest non-provisional in its chain, was filed (this one was filed Dec 21, 2023); a parent in its chain could not be resolved (the next row) | Nov 18, 2040 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +322 days, USPTO patent term adjustment record | Oct 6, 2041 | 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 | In force | High confidence |
| Computed term end | The steps above, in order | Oct 6, 2041 | Medium confidence |
This family
| US 11,890,213 | In force Sep 2041 | Sep 2041 |
| US 12,708,535 | this patent Oct 2041 | Oct 2041 |
The applications whose file history this site holds. The family may have others.
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
Oct 2041
Term ends Oct 6, 2041. Maintenance fees still fall due before then
Note
The 322 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
We have no citation count for this patent yet. That is not the same as never having been cited.
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.