Term ends Apr 23, 2030 · Medium confidence
20-year base term ends Apr 23, 2030
Why Medium: A parent in the chain could not be resolved.
Held by Idemitsu Kosan Co., Ltd.
Filed Sep 10, 2015 as application 14/850,357 · Granted Oct 11, 2016
Base term, 20 years from filing
Today
2010
2030
Clock starts
Apr 23, 2010
Apr 23, 2010
Term ends
Apr 23, 2030
Apr 23, 2030
Granted
Oct 11, 2016
Oct 11, 2016
base term
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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.
2 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.
9
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. 2 of 3 maintenance fees are paid so far. 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 23, 2010, when application PCT/JP2010/002959, the earliest non-provisional in its chain, was filed (this one was filed Sep 10, 2015); a parent in its chain could not be resolved (the next row) | Apr 23, 2030 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Apr 23, 2030 | Medium confidence |
This family
| US 8,431,250 | In force no later than May 2030 | no later than May 2030 |
| US 9,166,179 | In force Jul 2031 | Jul 2031 |
| US 9,466,800 | this patent Apr 2030 | Apr 2030 |
| US 9,741,938 | In force Apr 2030 | Apr 2030 |
| US 10,263,191 | In force Apr 2030 | Apr 2030 |
| US 10,686,137 | In force Apr 2030 | Apr 2030 |
| US 11,024,806 | In force Apr 2030 | Apr 2030 |
| Application 17/243,909 | Abandoned not computed | not computed |
8 of 9 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
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
Apr 2030
Term ends Apr 23, 2030. Maintenance fees still fall due before then
Citations
4
later US patents cite this one
That is below the median of utility patents granted in 2016 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.