Term ends Apr 1, 2041 · Medium confidence
20-year base term ends Apr 1, 2041
Why Medium: A parent in the chain could not be resolved.
Held by 247SOLAR Inc.
Filed Sep 30, 2022 as application 17/958,192 · Granted May 20, 2025
Base term, 20 years from filing
Today
2021
2041
Clock starts
Apr 1, 2021
Apr 1, 2021
Term ends
Apr 1, 2041
Apr 1, 2041
Granted
May 20, 2025
May 20, 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
None
Term adjustment
No prosecution delay on this record.
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.
3
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 is its 20-year base term, with no adjustment for prosecution delay. 0 of 3 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 Apr 1, 2021, when application PCT/US2021/025473, the earliest non-provisional in its chain, was filed (this one was filed Sep 30, 2022); a parent in its chain could not be resolved (the next row) | Apr 1, 2041 | 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 | None on file | no change | 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 | Apr 1, 2041 | Medium confidence |
This family
| Application PCT/US2021/025473 | PCT application no patent term | no patent term |
| US 12,305,888 | this patent Apr 2041 | Apr 2041 |
| US 12,716,618 | In force Apr 2041 | Apr 2041 |
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 |
|---|---|---|---|
| Jul 18, 2023 Reel 64292, frame 652 | Anderson, Bruce N.; Treece, William Dean | 247SOLAR Inc. | Assignment of Assignor's Interest |
| Jul 18, 2023 Reel 64292, frame 697 | Nash, James S. | Brayton Energy, LLC | Assignment of Assignor's Interest |
| Jul 18, 2023 Reel 64292, frame 863 | Hamrin, Douglas A. | Ursa Energy Solutions, Inc. | Assignment of Assignor's Interest |
| Jul 18, 2023 Reel 64293, frame 140 | Brayton Energy, LLC | 247SOLAR Inc. | Assignment of Assignor's Interest |
| Jul 18, 2023 Reel 64293, frame 231 | Ursa Energy Solutions, Inc. | 247SOLAR 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
Apr 2041
Term ends Apr 1, 2041. Maintenance fees still fall due before then
Citations
1
later US patent cites 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.