Collateral for a security interest recorded Apr 23, 2026 (Western Alliance Bank).

Term ends no later than Oct 10, 2039 · Medium confidence

Computed 20-year base term

In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.

Held by Session AI, Inc.

Filed Apr 17, 2019 as application 16/387,517 · Granted Sep 7, 2021

Base term plus 176 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Ends no later than Oct 10, 2039

2019 2039

Clock starts
Apr 17, 2019

Ends no later than
Oct 10, 2039

Granted
Sep 7, 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

176

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

Unresolved

Terminal disclaimer

On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.

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.

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 176 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 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 17, 2019, when this application, 16/387,517, was filed	Apr 17, 2039	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+176 days, USPTO patent term adjustment record	Oct 10, 2039	High confidence
Terminal disclaimer cap	Disclaimer on file (approved), reference document not resolved	no cap applied, and none guessed	Medium 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	no later than Oct 10, 2039	Medium confidence

This family

US 11,113,615	this patent no later than Oct 2039	no later than Oct 2039
US 12,373,226	In force Apr 2039	Apr 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
Aug 5, 2019 Reel 49963, frame 64	Malhotra, Manish; Sikdar, Siddartha; Sarkar, Aurobindo	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

Oct 2039

Term ends no later than Oct 10, 2039. Maintenance fees still fall due before then

Note

A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed

Note

The 176 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Open question

A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Oct 10, 2039. We will not guess the cap.

Citations

later US patents cite this one

That is top 25% 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

This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.

Real-Time Event Analysis Utilizing Relevance and Sequencing