Term ends Jun 25, 2027 · High confidence
20-year base term ends Jun 13, 2028
Held by Kyoto University
Filed Jun 12, 2009 as application 12/484,152 · Granted Dec 15, 2015
Base term plus 4 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2008
2028
Clock starts
Jun 13, 2008
Jun 13, 2008
Term ends
Jun 25, 2027
Jun 25, 2027
Granted
Dec 15, 2015
Dec 15, 2015
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
4
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 8,211,697, US 8,278,104.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
8
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 4 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 2 of 2 maintenance fees are paid so far. 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 Jun 13, 2008, when application 12/157,967, the earliest non-provisional in its chain, was filed (this one was filed Jun 12, 2009) | Jun 13, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +4 days, USPTO patent term adjustment record | Jun 17, 2028 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,211,697, US 8,278,104) | capped to Jun 25, 2027 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jun 25, 2027 | High confidence |
This family
| US 8,211,697 | In force Sep 2029 | Sep 2029 |
| Application 12/465,633 | Abandoned not computed | not computed |
| US 8,257,941 | In force Nov 2028 | Nov 2028 |
| US 9,213,999 | this patent Jun 2027 | Jun 2027 |
| Application 12/564,836 | Abandoned not computed | not computed |
| Application 12/580,216 | Abandoned not computed | not computed |
| Application 12/685,569 | Abandoned not computed | not computed |
| Application 12/709,379 | Abandoned not computed | not computed |
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 23248, frame 813 | Sakurada, Kazuhiro | Ipierian, Inc. | Assignment of Assignor's Interest |
| Mar 7, 2011 Reel 25914, frame 102 | Ipierian, Inc. | Kyoto University | 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
Jun 2027
Term ends Jun 25, 2027. No further fees fall due before then
Note
The 4 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 8,211,697, US 8,278,104.
Citations
48
later US patents cite this one
That is top 10% of utility patents granted in 2015 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.