Term ends May 21, 2042 · High confidence
20-year base term ends May 16, 2039
Held by Zenflow, Inc.
Filed May 16, 2019 as application 16/414,410 · Granted Oct 3, 2023
Base term plus 1101 days of patent term adjustment (USPTO delay)
Today
2019
2042
Clock starts
May 16, 2019
May 16, 2019
Term ends
May 21, 2042
May 21, 2042
Granted
Oct 3, 2023
Oct 3, 2023
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
1,101
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.
4
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 1101 days past its 20-year base term on prosecution delay. 0 of 3 maintenance fees are 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 May 16, 2019, when this application, 16/414,410, was filed | May 16, 2039 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1101 days, USPTO patent term adjustment record | May 21, 2042 | 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 | May 21, 2042 | High confidence |
This family
| US 11,771,575 | this patent May 2042 | May 2042 |
| Application 18/239,865 | Abandoned not computed | not computed |
| Application 18/378,940 | Abandoned not computed | not computed |
| US 12,714,587 | In force Jun 2039 | Jun 2039 |
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 |
|---|---|---|---|
| May 29, 2019 Reel 49302, frame 253 | Bly, Austin Michael; Sicotte, Marcel Song; Mehta, Shreya; Belef, William Martin; Damiano, Nicholas | Zenflow, Inc. | Assignment of Assignor's Interest |
| Jun 3, 2024 Reel 67600, frame 810 | Zenflow, Inc. | First-Citizens Bank & Trust Company | Security Interest |
| Jan 3, 2025 Reel 69732, frame 300 | First-Citizens Bank & Trust Company | Zenflow, Inc. | Release of Security 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
May 2042
Term ends May 21, 2042. Maintenance fees still fall due before then
Note
The 1101 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
23
later US patents cite this one
That is top 5% of utility patents granted in 2023 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.