Also listed on Metso Paper Karlstad AB, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jan 1, 2027 · High confidence
20-year base term ended Aug 10, 2026
Held by Valmet AB
Filed Feb 25, 2009 as application 12/375,358 · Granted May 3, 2011
Base term plus 144 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Aug 10, 2006
Aug 10, 2006
Term ends
Jan 1, 2027
Jan 1, 2027
Granted
May 3, 2011
May 3, 2011
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
144
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 144 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 10, 2006, when application PCT/SE2006/000940, the earliest non-provisional in its chain, was filed (this one was filed Feb 25, 2009) | Aug 10, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +144 days, USPTO patent term adjustment record | Jan 1, 2027 | 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 | Jan 1, 2027 | High confidence |
This family
| US 7,935,224 | this patent Jan 2027 | Jan 2027 |
1 of 2 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 |
|---|---|---|---|
| Sep 17, 2009 Reel 23243, frame 366 | Videgren, Leif | Metso Paper Karlstad AB | Assignment of Assignor's Interest |
| Feb 18, 2013 Reel 29822, frame 770 | Metso Paper Karlstad AB | Metso Paper Sweden AB | Merger |
| Mar 1, 2013 Reel 29904, frame 300 | Metso Paper Karlstad AB | Metso Paper Sweden AB | Corrective Assignment to Correct the Receiving Party's Address Previously Recorded on Reel 029822 Frame 0770. Assignor(S) Hereby Confirms the Receiving Party's Address Is Gustaf Gidlofs Vag 4, 851 94 Sundsvall, Sweden. |
| Feb 18, 2014 Reel 32271, frame 186 | Metso Paper Sweden AB | Valmet AB | 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.
What's changing
Jan 2027
Term ends Jan 1, 2027. No further fees fall due before then
Note
The 144 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is below the median of utility patents granted in 2011 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.