Term ends Aug 21, 2029 · High confidence
20-year base term ends Aug 21, 2029
Held by Carbon Engineering ULC
Filed Aug 21, 2009 as application 12/545,579 · Granted Aug 4, 2015
Base term, 20 years from filing
Today
2009
2029
Clock starts
Aug 21, 2009
Aug 21, 2009
Term ends
Aug 21, 2029
Aug 21, 2029
Granted
Aug 4, 2015
Aug 4, 2015
base term
fee events
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
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 is its 20-year base term, with no adjustment for prosecution delay. 2 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 Aug 21, 2009, when this application, 12/545,579, was filed | Aug 21, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 21, 2029 | High confidence |
This family
| US 9,095,813 | this patent Aug 2029 | Aug 2029 |
| US 11,504,667 | In force Aug 2029 | Aug 2029 |
| US 12,151,202 | In force 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 |
|---|---|---|---|
| Jan 14, 2011 Reel 25645, frame 878 | Keith, David; Mahmoudkhani, Maryam; Biglioli, Alessandro; Hart, Brandon; Heidel, Kenton; Foniok, Mike | C12 Equity Ltd. | Assignment of Assignor's Interest |
| Jan 14, 2011 Reel 25645, frame 941 | C12 Equity Ltd. | Carbon Engineering Limited Partnership | Assignment of Assignor's Interest |
| Feb 28, 2018 Reel 45062, frame 77 | 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
Aug 2029
Term ends Aug 21, 2029. Maintenance fees still fall due before then
Citations
50
later US patents cite this one
That is top 10% of utility patents granted in 2015 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.