Term ends Mar 26, 2039 · High confidence
20-year base term ends Mar 18, 2039
Filed Nov 15, 2022 as application 17/987,682 · Granted Mar 25, 2025
Base term plus 8 days of patent term adjustment (USPTO delay)
Today
2019
2039
Clock starts
Mar 18, 2019
Mar 18, 2019
Term ends
Mar 26, 2039
Mar 26, 2039
Granted
Mar 25, 2025
Mar 25, 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
8
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 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.
2
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 8 days past its 20-year base term on prosecution delay. 0 of 3 maintenance fees are 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 Mar 18, 2019, when application 16/357,170, the earliest non-provisional in its chain, was filed (this one was filed Nov 15, 2022) | Mar 18, 2039 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +8 days, USPTO patent term adjustment record | Mar 26, 2039 | 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 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 26, 2039 | High confidence |
This family
| US 11,557,800 | In force Apr 2040 | Apr 2040 |
| US 12,261,276 | this patent Mar 2039 | Mar 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 |
|---|---|---|---|
| Nov 15, 2022 Reel 61782, frame 600 | Harris, W. Porter; Ashraf, Umran; Thibault, Robert Wesley; Certo, Nick; Galvan, Karlo; Dubey, Prahit | Romeo Systems, Inc. | Assignment of Assignor's Interest |
| Sep 8, 2023 Reel 64849, frame 948 | SG Service Co., LLC, as Assignee for Romeo Power, Inc. | Mullen Automotive, Inc. | Assignment of Assignor's Interest |
| Jan 19, 2024 Reel 66178, frame 777 | Romeo Systems Technology, LLC; Romeo Systems, Inc.; Romeo Power, Inc. | SG Service Co., LLC, as Assignee for Romeo Power, Inc. | Assignment of Assignor's 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
Mar 2039
Term ends Mar 26, 2039. Maintenance fees still fall due before then
Note
The 8 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.