Collateral for a security interest recorded Mar 5, 2026 (Hercules Capital, Inc.).
Term ends Sep 29, 2041 · High confidence
20-year base term ends Sep 29, 2041
Held by Expel, Inc.
Filed Feb 15, 2022 as application 17/672,140 · Granted May 23, 2023
Base term, 20 years from filing
Today
2021
2041
Clock starts
Sep 29, 2021
Sep 29, 2021
Term ends
Sep 29, 2041
Sep 29, 2041
Granted
May 23, 2023
May 23, 2023
base term
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 11,303,666, to Sep 29, 2041. The term already ends on or before that date, so the cap shortened nothing.
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 1 of 3 maintenance fees is 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 Sep 29, 2021, when application 17/488,800, the earliest non-provisional in its chain, was filed (this one was filed Feb 15, 2022) | Sep 29, 2041 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 11,303,666) | resolves to Sep 29, 2041, no earlier than this term, so no change | 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 | Sep 29, 2041 | High confidence |
This family
| US 11,303,666 | In force Sep 2041 | Sep 2041 |
| US 11,658,999 | this patent Sep 2041 | Sep 2041 |
| US 12,101,348 | In force no later than Sep 2041 | no later than Sep 2041 |
| Application 18/811,493 | Pending not computed | not computed |
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 |
|---|---|---|---|
| Apr 25, 2022 Reel 59700, frame 643 | Peters, Matt; Silberman, Peter; Weber, Elisabeth; Begeman, John; Whalen, Dan; Hencinski, Jon | Expel, Inc. | Assignment of Assignor's Interest |
| Feb 13, 2023 Reel 62741, frame 584 | Expel, Inc. | Jpmorgan Chase Bank, N.a. | Intellectual Property Security Agreement |
| Feb 23, 2026 Reel 73866, frame 99 | Jpmorgan Chase Bank, N.a. | Expel, Inc. | Release of Security Interest |
| Mar 5, 2026 Reel 75041, frame 970 | Expel, Inc. | Hercules Capital, Inc. | Intellectual Property Security Agreement |
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
Sep 2041
Term ends Sep 29, 2041. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 11,303,666, ends no earlier than this term, so it caps nothing.
Citations
1
later US patent cites this one
That is below the median 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.