Term ends no later than Mar 13, 2038 · Low confidence
20-year base term ends Nov 17, 2037
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.
Filed Apr 30, 2021 as application 17/246,431 · Granted Jun 13, 2023
Base term plus 116 days of patent term adjustment (USPTO delay)
Today
2017
2038
Clock starts
Nov 17, 2017
Nov 17, 2017
Ends no later than
Mar 13, 2038
Mar 13, 2038
Granted
Jun 13, 2023
Jun 13, 2023
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
116
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.
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 116 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. 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 Nov 17, 2017, when application 15/815,975, the earliest non-provisional in its chain, was filed (this one was filed Apr 30, 2021); a parent in its chain could not be resolved (the next row) | Nov 17, 2037 | 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 | +116 days, USPTO patent term adjustment record | Mar 13, 2038 | 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 | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than Mar 13, 2038 | Low confidence |
This family
| US 10,998,590 | In force Mar 2039 | Mar 2039 |
| US 11,677,109 | this patent no later than Mar 2038 | no later than Mar 2038 |
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 17, 2021 Reel 58132, frame 589 | Harris, W. Porter; Wang, Qian; Vite, Berton; Greene, W. Hunter | Romeo Systems, Inc. | Assignment of Assignor's Interest |
| Nov 17, 2021 Reel 58132, frame 653 | Romeo Systems, Inc. | Romeo Systems Technology, LLC | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Mar 2038
Term ends no later than Mar 13, 2038. 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 116 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 Mar 13, 2038. We will not guess the cap.
Citations
5
later US patents cite this one
That is top 25% 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.