Term ends no later than Aug 18, 2032 · Medium confidence
20-year base term ends Jan 19, 2032
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Held by Tohoku University
Filed Sep 9, 2013 as application 13/980,703 · Granted Jun 28, 2016
Base term plus 212 days of patent term adjustment (USPTO delay)
Today
2012
2032
Clock starts
Jan 19, 2012
Jan 19, 2012
Ends no later than
Aug 18, 2032
Aug 18, 2032
Granted
Jun 28, 2016
Jun 28, 2016
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
212
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
39
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 212 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 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 Jan 19, 2012, when application PCT/JP2012/051075, the earliest non-provisional in its chain, was filed (this one was filed Sep 9, 2013) | Jan 19, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +212 days, USPTO patent term adjustment record | Aug 18, 2032 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium 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 | no later than Aug 18, 2032 | Medium confidence |
This family
| US 9,496,551 | In force Jul 2029 | Jul 2029 |
| Application 13/121,229 | Abandoned not computed | not computed |
| US 9,505,631 | In force Apr 2032 | Apr 2032 |
| US 9,249,034 | In force Mar 2033 | Mar 2033 |
| Application 13/503,215 | Abandoned not computed | not computed |
| US 8,986,571 | In force Jan 2032 | Jan 2032 |
| Application 13/825,584 | Abandoned not computed | not computed |
| US 9,378,876 | this patent no later than Aug 2032 | no later than Aug 2032 |
8 of 39 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 9, 2013 reel/frame not recorded | Polwatta Gallage, Chammika Ruwan; Takahashi, Migaku; Kobayashi, Naoya; Ogata, Yasunobu; Ogawa, Tomoyuki; Kohara, Kaori | Toda Kogyo Corporation | Assignment of Assignor's Interest |
| Sep 9, 2013 reel/frame not recorded | Polwatta Gallage, Chammika Ruwan; Takahashi, Migaku; Kobayashi, Naoya; Ogata, Yasunobu; Ogawa, Tomoyuki; Kohara, Kaori | Tohoku University | Assignment of Assignor's Interest |
| Sep 9, 2013 Reel 31308, frame 24 | Takahashi, Migaku; Ogawa, Tomoyuki; Ogata, Yasunobu; Kobayashi, Naoya; Polwatta Gallage, Chammika Ruwan; Kohara, Kaori | Toda Kogyo Corporation; Tohoku University | Assignment of Assignor's Interest |
| Jun 30, 2022 Reel 60544, frame 194 | Toda Kogyo Corp. | Toda Kogyo Corp. | Change of Address |
| Jul 20, 2022 Reel 60562, frame 119 | Toda Kogyo Corp. | Tohoku 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
Aug 2032
Term ends no later than Aug 18, 2032. Maintenance fees still fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 212 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Aug 18, 2032. We will not guess the cap.
Citations
3
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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.