Collateral for a security interest recorded Oct 5, 2026 (Trinity Capital Inc.).
Term ends Oct 26, 2037 · Medium confidence
20-year base term ends Apr 20, 2037
Why Medium: A parent in the chain could not be resolved.
Held by Zenflow, Inc.
Filed Oct 9, 2018 as application 16/155,506 · Granted Mar 23, 2021
Base term plus 189 days of patent term adjustment (USPTO delay)
Today
2017
2037
Clock starts
Apr 20, 2017
Apr 20, 2017
Term ends
Oct 26, 2037
Oct 26, 2037
Granted
Mar 23, 2021
Mar 23, 2021
base term
patent term adjustment
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
189
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
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 189 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is 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 Apr 20, 2017, when application PCT/US2017/028677, the earliest non-provisional in its chain, was filed (this one was filed Oct 9, 2018); a parent in its chain could not be resolved (the next row) | Apr 20, 2037 | 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 | +189 days, USPTO patent term adjustment record | Oct 26, 2037 | 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 | Oct 26, 2037 | Medium confidence |
This family
| Application PCT/US2017/028677 | PCT application no patent term | no patent term |
| US 10,952,885 | this patent Oct 2037 | Oct 2037 |
| US 11,813,184 | In force Feb 2038 | Feb 2038 |
| US 12,685,654 | In force Aug 2038 | Aug 2038 |
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 |
|---|---|---|---|
| Jul 8, 2019 Reel 49686, frame 458 | Sicotte, Marcel Song; Mehta, Shreya; Bly, Austin M.; Jabba, Ronald | 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 |
| Oct 5, 2026 Reel 76254, frame 769 | Zenflow, Inc. | Trinity Capital Inc. | 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
Oct 2037
Term ends Oct 26, 2037. Maintenance fees still fall due before then
Note
The 189 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
17
later US patents cite this one
That is top 10% of utility patents granted in 2021 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.