Term ends Nov 26, 2026 · High confidence
20-year base term ended Nov 25, 2024
Held by Mitsubishi Chemical Corporation
Filed May 26, 2006 as application 11/441,094 · Granted Apr 2, 2013
Base term plus 731 days of patent term adjustment (USPTO delay)
Today
2004
2026
Clock starts
Nov 25, 2004
Nov 25, 2004
Term ends
Nov 26, 2026
Nov 26, 2026
Granted
Apr 2, 2013
Apr 2, 2013
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
731
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.
7
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 731 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 Nov 25, 2004, when application PCT/JP2004/017895, the earliest non-provisional in its chain, was filed (this one was filed May 26, 2006) | Nov 25, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +731 days, USPTO patent term adjustment record | Nov 26, 2026 | 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 | Nov 26, 2026 | High confidence |
This family
| US 8,409,470 | this patent Nov 2026 | Nov 2026 |
| Application 13/775,334 | Abandoned not computed | not computed |
| US 9,738,829 | Term ended no later than Feb 2025 | no later than Feb 2025 |
| US 10,072,207 | Term ended Nov 2024 | Nov 2024 |
| US 11,084,980 | Lapsed on the fee record Aug 2025 | Aug 2025 |
| US 11,697,765 | Term ended no later than Nov 2024 | no later than Nov 2024 |
6 of 7 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 19, 2006 Reel 18321, frame 4 | Hirosaki, Naoto; Ueda, Kyota; Yamamoto, Hajime | Independent Administrative Institution, National Institute for Materials Science; Mitsubishi Chemical Corporation | Assignment of Assignor's Interest |
| Sep 19, 2006 reel/frame not recorded | Hirosaki, Naoto; Ueda, Kyota; Yamamoto, Hajime | Independent Administrative Institution, National Institute for Materials Science | Assignment of Assignor's Interest |
| Sep 19, 2006 reel/frame not recorded | Hirosaki, Naoto; Ueda, Kyota; Yamamoto, Hajime | Mitsubishi Chemical Corporation | Assignment of Assignor's Interest |
| Apr 7, 2015 Reel 35386, frame 153 | Independent Administrative Institution, National Institute for Materials Science; Mitsubishi Chemical Corporation | Nichia Corporation; Citizen Electronics Co. Ltd. | Assignment of Partial Rights |
| Apr 7, 2015 reel/frame not recorded | Mitsubishi Chemical Corporation; Independent Administrative Institution, National Institute for Materials Science | Nichia Corporation | Assignment of Partial Rights |
| Apr 7, 2015 reel/frame not recorded | Mitsubishi Chemical Corporation; Independent Administrative Institution, National Institute for Materials Science | Citizen Electronics Co. Ltd. | Assignment of Partial Rights |
| Sep 4, 2017 Reel 43750, frame 207 | Mitsubishi Chemical Corporation | Mitsubishi Rayon Co., Ltd. | Merger |
| Sep 5, 2017 Reel 43750, frame 834 | Mitsubishi Rayon Co., Ltd. | Mitsubishi Chemical Corporation | Change of Name |
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
Nov 2026
Term ends Nov 26, 2026. No further fees fall due before then
Note
The 731 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
188
later US patents cite this one
That is top 5% of utility patents granted in 2013 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.