Collateral for a security interest recorded Apr 23, 2026 (Western Alliance Bank).
Term ends Apr 28, 2041 · High confidence
20-year base term ends Feb 12, 2040
Held by Session AI, Inc.
Filed Feb 12, 2020 as application 16/789,032 · Granted Dec 19, 2023
Base term plus 441 days of patent term adjustment (USPTO delay)
Today
2020
2041
Clock starts
Feb 12, 2020
Feb 12, 2020
Term ends
Apr 28, 2041
Apr 28, 2041
Granted
Dec 19, 2023
Dec 19, 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
441
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.
This patent's term runs 441 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 Feb 12, 2020, when this application, 16/789,032, was filed | Feb 12, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +441 days, USPTO patent term adjustment record | Apr 28, 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 | Apr 28, 2041 | High confidence |
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 4, 2020 Reel 52565, frame 19 | Mukherjee, Arnab; Malhotra, Manish; Saha, Priya | Zineone, Inc. | Assignment of Assignor's Interest |
| Jun 12, 2024 Reel 67711, frame 895 | Zineone, Inc. | Session AI, Inc. | Change of Name |
| Apr 23, 2026 Reel 74458, frame 296 | Session AI, Inc. | Western Alliance Bank | 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
Apr 2041
Term ends Apr 28, 2041. Maintenance fees still fall due before then
Note
The 441 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
6
later US patents cite this one
That is top 25% 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.