Collateral for a security interest recorded Apr 13, 2023 (Keyframe Capital Partners, L.P.).
Term ends Nov 28, 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 Oct 6, 2021 as application 17/495,011 · Granted Oct 17, 2023
Base term plus 51 days of patent term adjustment (USPTO delay)
Today
2020
2040
Clock starts
Oct 8, 2020
Oct 8, 2020
Term ends
Nov 28, 2040
Nov 28, 2040
Granted
Oct 17, 2023
Oct 17, 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
51
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.
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 runs 51 days past its 20-year base term on 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 Oct 6, 2021); 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 | +51 days, USPTO patent term adjustment record | Nov 28, 2040 | 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 | Nov 28, 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 | this patent 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 | In force 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 |
|---|---|---|---|
| Oct 12, 2021 Reel 57771, frame 452 | Kahn, Seth Marshall; Stratakos, Anthony John; Cammi, Corrado; John, Anderson Rennie; Lau, Kin Keung | Element Energy, Inc. | Assignment of Assignor's Interest |
| Nov 11, 2021 Reel 58107, frame 545 | Kahn, Seth Marshall; Stratakos, Anthony John; Cammi, Corrado; John, Anderson Rennie; Lau, Kin Keung | Element Energy, Inc. | Correction of Error in Date Listed in Previously Recorded Cover Sheet Corresponding to Reel/Frame 057771/0452. |
| Apr 13, 2023 Reel 63318, frame 456 | Element Energy, Inc. | Keyframe Capital Partners, L.p. | Security 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
Nov 2040
Term ends Nov 28, 2040. Maintenance fees still fall due before then
Note
The 51 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
12
later US patents cite this one
That is top 10% 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.