Term ends Dec 29, 2043 · High confidence
20-year base term ends Sep 14, 2042
Held by Exfo Oy
Filed Sep 14, 2022 as application 17/944,266 · Granted Jan 20, 2026
Base term plus 471 days of patent term adjustment (USPTO delay)
Today
2022
2043
Clock starts
Sep 14, 2022
Sep 14, 2022
Term ends
Dec 29, 2043
Dec 29, 2043
Granted
Jan 20, 2026
Jan 20, 2026
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
471
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.
This patent's term runs 471 days past its 20-year base term on prosecution delay. 0 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 Sep 14, 2022, when this application, 17/944,266, was filed | Sep 14, 2042 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +471 days, USPTO patent term adjustment record | Dec 29, 2043 | 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 | Dec 29, 2043 | High confidence |
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 13, 2022 Reel 61414, frame 786 | Al-dulaimi, Anwer | Exfo Inc. | Assignment of Assignor's Interest |
| Oct 13, 2022 Reel 61414, frame 943 | Boulet, Stéphane Michel; Alouani, Jad; Cissé, Manuel; Yang, Choua; Ernot, Guillaume | Exfo Solutions SAS | Assignment of Assignor's Interest |
| Oct 13, 2022 Reel 61415, frame 132 | Exfo Inc. | Exfo Oy | Assignment of Assignor's Interest |
| Oct 13, 2022 Reel 61415, frame 227 | Exfo Solutions SAS | Exfo Oy | Assignment of Assignor's 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
Dec 2043
Term ends Dec 29, 2043. Maintenance fees still fall due before then
Note
The 471 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
We have no citation count for this patent yet. That is not the same as never having been cited.
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.