Term ended Apr 7, 2026 · Medium confidence
20-year base term ended Apr 7, 2026
Why Medium: A parent in the chain could not be resolved.
Held by BASF SE
Filed Dec 9, 2011 as application 13/315,963 · Granted Apr 2, 2013
Base term, 20 years from filing
Today
Term ended Apr 7, 2026
2006
2026
Clock starts
Apr 7, 2006
Apr 7, 2006
Term ended
Apr 7, 2026
Apr 7, 2026
Granted
Apr 2, 2013
Apr 2, 2013
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
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.
7
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 is its 20-year base term, with no adjustment for prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. Confidence: Medium. 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 Apr 7, 2006, when applications 11/399,816 and 11/400,623, the earliest non-provisional applications in its chain, were filed (this one was filed Dec 9, 2011); a parent in its chain could not be resolved (the next row) | Apr 7, 2026 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | 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 | term ended | High confidence |
| Computed term end | The steps above, in order | Apr 7, 2026 | Medium confidence |
This family
| Application PCT/US2007/065934 | PCT application no patent term | no patent term |
| US 8,217,111 | In force Nov 2026 | Nov 2026 |
| US 8,410,211 | this patent Apr 2026 | Apr 2026 |
| US 8,383,722 | Term ended Apr 2026 | Apr 2026 |
| US 9,290,651 | Term ended Apr 2026 | Apr 2026 |
5 of 7 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 |
|---|---|---|---|
| Mar 12, 2012 Reel 27841, frame 901 | Takamura, Koichi; Burghart, Armin | BASF SE | 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.
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Alerts on its grants, lapses and transfers.
Citations
3
later US patents cite this one
That is below the median of utility patents granted in 2013 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.