Term ends Mar 30, 2030 · High confidence
20-year base term ends Aug 20, 2029
Held by Fer-Pal Construction Ltd.
Filed Aug 20, 2009 as application 12/544,320 · Granted Jun 12, 2012
Base term plus 222 days of patent term adjustment (USPTO delay)
Today
2009
2030
Clock starts
Aug 20, 2009
Aug 20, 2009
Term ends
Mar 30, 2030
Mar 30, 2030
Granted
Jun 12, 2012
Jun 12, 2012
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
222
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
2
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 222 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 20, 2009, when this application, 12/544,320, was filed | Aug 20, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +222 days, USPTO patent term adjustment record | Mar 30, 2030 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 30, 2030 | High confidence |
This family
| US 8,197,158 | this patent Mar 2030 | Mar 2030 |
| US 8,272,808 | In force Aug 2029 | Aug 2029 |
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 |
|---|---|---|---|
| Dec 7, 2009 Reel 23610, frame 921 | Sudano, Anthony; Davison, Michael; Cote, Benoit | Sanexen Environmental Services Inc. | Assignment of Assignor's Interest |
| Aug 14, 2014 Reel 33538, frame 678 | Sanexen Environmental Services Inc. | Bank of Montreal | Security Interest |
| Jan 9, 2024 Reel 66071, frame 554 | Bank of Montreal | Sanexen Environmental Services Inc. | Release of Security Interest |
| Feb 19, 2024 Reel 66491, frame 709 | Sanexen Services Environnementaux Inc./Sanexen Environmental Services Inc.; Niedner Inc. | The Toronto-Dominion Bank | Security Interest |
| Feb 19, 2026 Reel 73830, frame 283 | Sanexen Environmental Services Inc. | Fer-Pal Construction Ltd. | Assignment of Assignor's Interest |
| Sep 9, 2026 Reel 75958, frame 72 | Fer-Pal Construction Ltd. | The Toronto-Dominion Bank | Security Interest |
| Sep 9, 2026 Reel 76348, frame 852 | The Toronto-Dominion Bank | Fer-Pal Construction Ltd.; Sanexen Environmental Services Inc.; Niedner Inc. | Release of 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
Mar 2030
Term ends Mar 30, 2030. No further fees fall due before then
Note
The 222 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
9
later US patents cite this one
That is above the median of utility patents granted in 2012 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.