Term ends Mar 31, 2040 · High confidence
20-year base term ends Dec 21, 2037
Held by Carbon Engineering ULC
Filed Jun 21, 2019 as application 16/472,379 · Granted May 23, 2023
USPTO first gave this application the number US 11,613,707 and withdrew it before it issued. That number now leads here.
Base term plus 831 days of patent term adjustment (USPTO delay)
Today
2017
2040
Clock starts
Dec 21, 2017
Dec 21, 2017
Term ends
Mar 31, 2040
Mar 31, 2040
Granted
May 23, 2023
May 23, 2023
base term
patent term adjustment
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
831
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
4
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 831 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is 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 Dec 21, 2017, when application PCT/CA2017/051581, the earliest non-provisional in its chain, was filed (this one was filed Jun 21, 2019) | Dec 21, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +831 days, USPTO patent term adjustment record | Mar 31, 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 31, 2040 | High confidence |
This family
| US 11,655,421 | this patent Mar 2040 | Mar 2040 |
| US 12,344,803 | In force Dec 2037 | Dec 2037 |
| Application 19/250,527 | Pending not computed | not computed |
3 of 4 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 21, 2021 Reel 54985, frame 898 | Carbon Engineering Limited Partnership | Carbon Engineering Ltd. | Assignment of Assignor's Interest |
| Jan 21, 2021 Reel 55058, frame 673 | Heidel, Kenton; Murphy, James; Corless, Adrian; Holmes, Geoff; McCahill, Jenny; Stukas, Anna; Ritchie, Jane; Nold, Kevin | Carbon Engineering Limited Partnership | 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
Mar 2040
Term ends Mar 31, 2040. Maintenance fees still fall due before then
Note
The 831 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
97
later US patents cite this one
That is top 1% 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.