Collateral for a security interest recorded Mar 5, 2026 (Hercules Capital, Inc.).
Term ends Oct 14, 2041 · Low confidence
20-year base term ends Oct 14, 2041
Held by Expel, Inc.
Filed Sep 13, 2024 as application 18/885,207 · Granted Aug 12, 2025
Base term, 20 years from filing
Today
2021
2041
Clock starts
Oct 14, 2021
Oct 14, 2021
Term ends
Oct 14, 2041
Oct 14, 2041
Granted
Aug 12, 2025
Aug 12, 2025
base term
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 12,120,147, to Oct 14, 2041. The term already ends on or before that date, so the cap shortened nothing.
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.
8
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. 0 of 3 maintenance fees are paid so far. Confidence: Low. 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 Oct 14, 2021, when application 17/501,708, the earliest non-provisional in its chain, was filed (this one was filed Sep 13, 2024); a parent in its chain could not be resolved (the next row) | Oct 14, 2041 | 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 | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 12,120,147) | resolves to Oct 14, 2041, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | In force | High confidence |
| Further caveats on record | The record names parents not resolved: 18607463, 17970069, 17696151, 17501708 | Low confidence overall | Low confidence |
| Computed term end | The steps above, in order | Oct 14, 2041 | Low confidence |
This family
| US 11,310,270 | In force Oct 2041 | Oct 2041 |
| US 11,509,689 | In force Oct 2041 | Oct 2041 |
| US 12,107,886 | In force no later than Apr 2042 | no later than Apr 2042 |
| US 12,120,147 | In force Oct 2041 | Oct 2041 |
| US 12,771,721 | In force Oct 2041 | Oct 2041 |
| US 12,388,870 | this patent Oct 2041 | Oct 2041 |
| US 12,531,903 | In force Oct 2041 | Oct 2041 |
| Application 19/421,364 | 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 |
|---|---|---|---|
| Sep 16, 2024 Reel 68593, frame 1 | Weber, Elisabeth; Hung, Jane | Expel, Inc. | Assignment of Assignor's 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.
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Alerts on its grants, lapses and transfers.
What's changing
Oct 2041
Term ends Oct 14, 2041. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 12,120,147, ends no earlier than this term, so it caps nothing.
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
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.