Also listed on BASF Performance Products LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends May 6, 2031 · High confidence
20-year base term ends Feb 18, 2028
Held by Sun Chemical B.V.
Filed Aug 17, 2009 as application 12/527,440 · Granted Dec 23, 2014
Base term plus 1173 days of patent term adjustment (USPTO delay)
Today
2008
2031
Clock starts
Feb 18, 2008
Feb 18, 2008
Term ends
May 6, 2031
May 6, 2031
Granted
Dec 23, 2014
Dec 23, 2014
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
1,173
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 1173 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 Feb 18, 2008, when application PCT/EP2008/051910, the earliest non-provisional in its chain, was filed (this one was filed Aug 17, 2009) | Feb 18, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1173 days, USPTO patent term adjustment record | May 6, 2031 | 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 | May 6, 2031 | High confidence |
This family
| US 8,916,236 | this patent May 2031 | May 2031 |
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 16, 2009 Reel 23240, frame 453 | Bujard, Patrice | Ciba Corporation | Conditional Assignment |
| May 5, 2023 Reel 63555, frame 543 | BASF Performance Products LLC | BASF Corporation | Merger |
| May 5, 2023 Reel 63557, frame 854 | Ciba Corporation | BASF Performance Products LLC | Change of Name |
| Jul 11, 2023 Reel 64215, frame 129 | BASF Corporation | BASF SE | Assignment of Assignor's Interest |
| Jul 11, 2023 Reel 64216, frame 19 | BASF SE | Sun Chemical B.V. | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
May 2031
Term ends May 6, 2031. No further fees fall due before then
Note
The 1173 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
4
later US patents cite this one
That is below the median of utility patents granted in 2014 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.