Collateral for a security interest recorded Feb 27, 2018 (National Bank of Canada).
Term ends Jun 30, 2027 · High confidence
20-year base term ended Sep 29, 2026
Held by Exfo Inc.
Filed Feb 14, 2013 as application 13/767,851 · Granted Nov 28, 2017
Base term plus 820 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2006
2027
Clock starts
Sep 29, 2006
Sep 29, 2006
Term ends
Jun 30, 2027
Jun 30, 2027
Granted
Nov 28, 2017
Nov 28, 2017
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
820
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 7,920,253.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
6
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 820 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 2 of 2 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 29, 2006, when application PCT/CA2006/001610, the earliest non-provisional in its chain, was filed (this one was filed Feb 14, 2013) | Sep 29, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +820 days, USPTO patent term adjustment record | Dec 27, 2028 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,920,253) | capped to Jun 30, 2027 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jun 30, 2027 | High confidence |
This family
| Application 11/727,759 | Abandoned not computed | not computed |
| US 7,920,253 | Lapsed on the fee record Apr 2015 | Apr 2015 |
| Application 12/568,554 | Abandoned not computed | not computed |
| US 9,829,429 | this patent Jun 2027 | Jun 2027 |
4 of 6 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 30, 2014 Reel 32088, frame 395 | Cyr, Normand; Chen, Hongxin; Schinn, Gregory Walter | Exfo Inc. | Assignment of Assignor's Interest |
| Feb 27, 2018 Reel 45470, frame 202 | Exfo Inc. | National Bank of Canada | Security Interest |
| Aug 8, 2025 Reel 72338, frame 500 | Exfo Inc. (a Corporation Resulting from the Amalgamation of 11172239 Canada Inc. and Exfo Inc.); Ontology-Partners Limited | National Bank of Canada | 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
Jun 2027
Term ends Jun 30, 2027. No further fees fall due before then
Note
The 820 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 7,920,253.
Citations
27
later US patents cite this one
That is top 25% of utility patents granted in 2017 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.