Also listed on Ciba Specialty Chemicals Corporation, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 17, 2026 · High confidence
20-year base term ended Mar 29, 2026
Held by BASF SE
Filed Apr 9, 2008 as application 11/887,498 · Granted Jun 11, 2013
Base term plus 233 days of patent term adjustment (USPTO delay)
Today
2006
2026
Clock starts
Mar 29, 2006
Mar 29, 2006
Term ends
Nov 17, 2026
Nov 17, 2026
Granted
Jun 11, 2013
Jun 11, 2013
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
233
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 233 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 Mar 29, 2006, when application PCT/EP2006/061120, the earliest non-provisional in its chain, was filed (this one was filed Apr 9, 2008) | Mar 29, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +233 days, USPTO patent term adjustment record | Nov 17, 2026 | 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 | Nov 17, 2026 | High confidence |
This family
| US 8,461,272 | this patent Nov 2026 | Nov 2026 |
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 |
|---|---|---|---|
| Feb 2, 2009 Reel 22202, frame 896 | Roth, Michael; Pfaendner, Rudolf; Wilen, Carl-eric Magnus; Nicolas, Ronan | Ciba Specialty Chemicals Corp. | Assignment of Assignor's Interest |
| May 9, 2013 Reel 30380, frame 218 | Ciba Specialty Chemicals Corporation | Ciba Corporation | Change of Name |
| May 9, 2013 Reel 30380, frame 245 | Ciba Corporation | BASF SE | Asset Transfer Agreement |
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
Nov 2026
Term ends Nov 17, 2026. No further fees fall due before then
Note
The 233 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.