Also listed on Katagiri Engineering Co., Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 18, 2033 · High confidence
20-year base term ends Aug 24, 2031
Held by National University Corporation Nagoya University, Nu Eco Engineering Co., Ltd. and Katagiri Engineering Co., Ltd.
Filed May 6, 2013 as application 13/819,284 · Granted Sep 20, 2016
Base term plus 725 days of patent term adjustment (USPTO delay)
Today
2011
2033
Clock starts
Aug 24, 2011
Aug 24, 2011
Term ends
Aug 18, 2033
Aug 18, 2033
Granted
Sep 20, 2016
Sep 20, 2016
base term
patent term adjustment
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
725
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
3
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 725 days past its 20-year base term on prosecution delay. 2 of 3 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 Aug 24, 2011, when application PCT/JP2011/004684, the earliest non-provisional in its chain, was filed (this one was filed May 6, 2013) | Aug 24, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +725 days, USPTO patent term adjustment record | Aug 18, 2033 | 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 | Aug 18, 2033 | High confidence |
This family
| US 9,447,518 | this patent Aug 2033 | Aug 2033 |
| US 10,577,719 | In force Feb 2033 | Feb 2033 |
2 of 3 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 |
|---|---|---|---|
| May 6, 2013 Reel 30398, frame 380 | Hori, Masaru; Amano, Hiroshi; Kano, Hiroyuki; Den, Shoji; Yamakawa, Koji | National University Corporation Nagoya University; Nu Eco Engineering Co., Ltd.; Katagiri Engineering Co., Ltd. | Assignment of Assignor's Interest |
| May 6, 2013 reel/frame not recorded | Amano, Hiroshi; Den, Shoji; Hori, Masaru; Kano, Hiroyuki; Yamakawa, Koji | National University Corporation Nagoya University | Assignment of Assignor's Interest |
| May 6, 2013 reel/frame not recorded | Amano, Hiroshi; Den, Shoji; Hori, Masaru; Kano, Hiroyuki; Yamakawa, Koji | Nu Eco Engineering Co., Ltd. | Assignment of Assignor's Interest |
| May 6, 2013 reel/frame not recorded | Amano, Hiroshi; Den, Shoji; Hori, Masaru; Kano, Hiroyuki; Yamakawa, Koji | Katagiri Engineering Co., Ltd. | 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 2033
Term ends Aug 18, 2033. Maintenance fees still fall due before then
Note
The 725 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
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
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.