Collateral for a security interest recorded Apr 3, 2025 (Keyframe Capital Partners, L.P.).
Term ends Oct 8, 2040 · Medium confidence
20-year base term ends Oct 8, 2040
Why Medium: A parent in the chain could not be resolved.
Held by Element Energy, Inc.
Filed Sep 25, 2023 as application 18/474,136 · Granted Apr 1, 2025
Base term, 20 years from filing
Today
2020
2040
Clock starts
Oct 8, 2020
Oct 8, 2020
Term ends
Oct 8, 2040
Oct 8, 2040
Granted
Apr 1, 2025
Apr 1, 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.
7
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 Oct 8, 2020, when application 17/066,238, the earliest non-provisional in its chain, was filed (this one was filed Sep 25, 2023); a parent in its chain could not be resolved (the next row) | Oct 8, 2040 | 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 | Oct 8, 2040 | Medium confidence |
This family
| US 10,992,149 | In force Oct 2040 | Oct 2040 |
| US 11,258,279 | In force Oct 2040 | Oct 2040 |
| US 11,791,642 | In force Nov 2040 | Nov 2040 |
| Application PCT/US2021/054057 | PCT application no patent term | no patent term |
| US 11,735,934 | In force Oct 2040 | Oct 2040 |
| US 12,266,959 | this patent Oct 2040 | Oct 2040 |
| Application 19/095,206 | Pending not computed | not computed |
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 |
|---|---|---|---|
| Sep 26, 2023 Reel 65036, frame 277 | Kahn, Seth Marshall; Stratakos, Anthony John; Cammi, Corrado; John, Anderson Rennie; Lau, Kin Keung | Element Energy, Inc. | Assignment of Assignor's Interest |
| Apr 3, 2025 Reel 70731, frame 176 | Element Energy, Inc. | Keyframe Capital Partners, L.p. | Security 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
Oct 2040
Term ends Oct 8, 2040. 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.