Term ends Jun 19, 2039 · High confidence
20-year base term ends Dec 4, 2038
Held by SF Motors, Inc.
Filed Apr 5, 2021 as application 17/222,716 · Granted Dec 19, 2023
Base term plus 197 days of patent term adjustment (USPTO delay)
Today
2018
2039
Clock starts
Dec 4, 2018
Dec 4, 2018
Term ends
Jun 19, 2039
Jun 19, 2039
Granted
Dec 19, 2023
Dec 19, 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
197
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 197 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 Dec 4, 2018, when application 16/209,828, the earliest non-provisional in its chain, was filed (this one was filed Apr 5, 2021) | Dec 4, 2038 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +197 days, USPTO patent term adjustment record | Jun 19, 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 | Jun 19, 2039 | High confidence |
This family
| US 11,024,877 | In force Apr 2039 | Apr 2039 |
| US 11,848,413 | this patent Jun 2039 | Jun 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 |
|---|---|---|---|
| Aug 30, 2023 Reel 64755, frame 112 | Ogata, Ken; Imoto, Hiroshi | SF Motors, Inc. | Assignment of Assignor's Interest |
| Aug 30, 2023 Reel 64755, frame 305 | SF Motors, Inc. | Chongqing Jinkang New Energy Vehicle Co., Ltd.; SF Motors, Inc. | Assignment of Assignor's Interest |
| Aug 30, 2023 Reel 64755, frame 389 | Chongqing Jinkang New Energy Vehicle Co., Ltd. | SF Motors, Inc. | Assignment of Assignor's Interest |
| Aug 30, 2023 Reel 64755, frame 425 | SF Motors, Inc. | Terawatt Technology Inc. | Assignment of Assignor's Interest |
| Aug 30, 2023 reel/frame not recorded | SF Motors, Inc. | Chongqing Jinkang New Energy Vehicle Co., Ltd. | Assignment of Assignor's Interest |
| Aug 30, 2023 reel/frame not recorded | SF Motors, Inc. | SF Motors, 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.
What's changing
Jun 2039
Term ends Jun 19, 2039. Maintenance fees still fall due before then
Note
The 197 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
1
later US patent cites 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
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.