Term ends Sep 27, 2029 · Medium confidence
20-year base term ends Aug 21, 2029
Why Medium: A parent in the chain could not be resolved.
Held by Carbon Engineering ULC
Filed Nov 21, 2022 as application 17/991,268 · Granted Nov 26, 2024
Base term plus 37 days of patent term adjustment (USPTO delay)
Today
2009
2029
Clock starts
Aug 21, 2009
Aug 21, 2009
Term ends
Sep 27, 2029
Sep 27, 2029
Granted
Nov 26, 2024
Nov 26, 2024
base term
patent term adjustment
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
37
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 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.
5
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 37 days past its 20-year base term on prosecution delay. 0 of 1 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 Aug 21, 2009, when application 12/545,579, the earliest non-provisional in its chain, was filed (this one was filed Nov 21, 2022); a parent in its chain could not be resolved (the next row) | Aug 21, 2029 | 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 | +37 days, USPTO patent term adjustment record | Sep 27, 2029 | 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 1 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 27, 2029 | Medium confidence |
This family
| US 9,095,813 | In force Aug 2029 | Aug 2029 |
| US 11,504,667 | In force Aug 2029 | Aug 2029 |
| US 12,151,202 | this patent Sep 2029 | Sep 2029 |
| Application 18/954,661 | Pending not computed | not computed |
4 of 5 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Feb 22, 2023 Reel 62763, frame 497 | Keith, David; Mahmoudkhani, Maryam; Biglioli, Alessandro; Hart, Brandon; Heidel, Kenton Robert; Foniok, Michal | C12 Equity Ltd. | Assignment of Assignor's Interest |
| Feb 22, 2023 Reel 62763, frame 605 | C12 Equity Ltd. | Carbon Engineering Limited Partnership | Assignment of Assignor's Interest |
| Feb 22, 2023 Reel 62763, frame 682 | Carbon Engineering Limited Partnership | Carbon Engineering Ltd. | Assignment of Assignor's Interest |
| Feb 28, 2024 Reel 66593, frame 551 | Carbon Engineering Ltd. | Carbon Engineering ULC | Change of Name |
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
Sep 2029
Term ends Sep 27, 2029. Maintenance fees still fall due before then
Note
The 37 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
3
later US patents cite this one
Fewer than half of the utility patents granted in 2024 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.