Term ends Mar 19, 2035 · Medium confidence
20-year base term ends Oct 7, 2034
Why Medium: A parent in the chain could not be resolved.
Held by Upstart Power, Inc.
Filed Aug 29, 2023 as application 18/457,507 · Granted Dec 30, 2025
Base term plus 163 days of patent term adjustment (USPTO delay)
Today
2014
2035
Clock starts
Oct 7, 2014
Oct 7, 2014
Term ends
Mar 19, 2035
Mar 19, 2035
Granted
Dec 30, 2025
Dec 30, 2025
base term
patent term adjustment
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
163
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 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
5
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 163 days past its 20-year base term on prosecution delay. 0 of 2 maintenance fees are 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 Oct 7, 2014, when application PCT/US2014/059447, the earliest non-provisional in its chain, was filed (this one was filed Aug 29, 2023); a parent in its chain could not be resolved (the next row) | Oct 7, 2034 | 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 | +163 days, USPTO patent term adjustment record | Mar 19, 2035 | 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 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 19, 2035 | Medium confidence |
This family
| Application PCT/US2014/059447 | PCT application no patent term | no patent term |
| US 10,446,858 | In force Apr 2037 | Apr 2037 |
| US 10,916,784 | In force Oct 2034 | Oct 2034 |
| US 11,784,331 | In force Oct 2035 | Oct 2035 |
| US 12,512,488 | this patent Mar 2035 | Mar 2035 |
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 29, 2023 Reel 64740, frame 700 | Palumbo, Nathan; Osenar, Paul; Perky, Joshua | Protonex Technology Corporation | Assignment of Assignor's Interest |
| Aug 29, 2023 Reel 64740, frame 842 | Protonex Technology Corporation | Upstart Power, Inc. | Assignment of Assignor's Interest |
| Aug 31, 2023 Reel 64787, frame 741 | Palumbo, Nathan; Osenar, Paul; Persky, Joshua | Protonex Technology Corporation | Corrective Assignment to Correct the Typographical Error in the 3RD Inventor's Last Name Previously Recorded on Reel 064740 Frame 0700. Assignor(S) Hereby Confirms the Assignment. |
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
Mar 2035
Term ends Mar 19, 2035. Maintenance fees still fall due before then
Note
The 163 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
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.