Collateral for a security interest recorded Jul 2, 2025 (Western Alliance Bank).
Term ends no later than Apr 2, 2040 · Medium confidence
20-year base term ends Jan 13, 2040
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 Ampup, Inc.
Filed Feb 9, 2021 as application 17/171,400 · Granted Aug 15, 2023
Base term plus 80 days of patent term adjustment (USPTO delay)
Today
2020
2040
Clock starts
Jan 13, 2020
Jan 13, 2020
Ends no later than
Apr 2, 2040
Apr 2, 2040
Granted
Aug 15, 2023
Aug 15, 2023
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
80
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.
16
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 80 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 Jan 13, 2020, when application 16/741,712, the earliest non-provisional in its chain, was filed (this one was filed Feb 9, 2021) | Jan 13, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +80 days, USPTO patent term adjustment record | Apr 2, 2040 | 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 Apr 2, 2040 | Medium confidence |
This family
| US 10,836,274 | In force Jan 2040 | Jan 2040 |
| US 10,953,765 | Lapsed on the fee record Mar 2025 | Mar 2025 |
| US 10,981,464 | In force Jan 2040 | Jan 2040 |
| US 11,648,846 | In force Jul 2040 | Jul 2040 |
| Application PCT/US2021/012579 | PCT application no patent term | no patent term |
| US 11,724,616 | In force no later than Jul 2040 | no later than Jul 2040 |
| US 11,724,617 | this patent no later than Apr 2040 | no later than Apr 2040 |
| US 11,673,483 | In force no later than Jun 2040 | no later than Jun 2040 |
8 of 16 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Feb 10, 2021 Reel 55219, frame 942 | Sun, Thomas Shaofeng; Gavrilovic, Timotej; Nguyen, Thai Vinh Loc | Nad Grid Corp. | Assignment of Assignor's Interest |
| Mar 17, 2024 Reel 66803, frame 133 | Nad Grid Corp. | Ampup, Inc. | Change of Name |
| Jul 2, 2025 Reel 71594, frame 505 | Ampup, 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 2040
Term ends no later than Apr 2, 2040. 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 80 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 Apr 2, 2040. We will not guess the cap.
Citations
0
later US patents cite 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
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.