Also listed on Nanocarrier Kabushiki Kaisha, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Apr 30, 2033 · High confidence
20-year base term ends Apr 30, 2033
Held by Nano Mrna Co., Ltd.
Filed Oct 5, 2017 as application 15/725,703 · Granted Jun 1, 2021
Base term plus 172 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2013
2033
Clock starts
Apr 30, 2013
Apr 30, 2013
Term ends
Apr 30, 2033
Apr 30, 2033
Granted
Jun 1, 2021
Jun 1, 2021
base term
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
172
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 9,808,480.
1 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.
4
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 172 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 1 of 2 maintenance fees is 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 Apr 30, 2013, when application PCT/JP2013/062531, the earliest non-provisional in its chain, was filed (this one was filed Oct 5, 2017) | Apr 30, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +172 days, USPTO patent term adjustment record | Oct 19, 2033 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,808,480) | capped to Apr 30, 2033 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Apr 30, 2033 | High confidence |
This family
| US 9,808,480 | In force Apr 2033 | Apr 2033 |
| US 11,020,418 | this patent Apr 2033 | Apr 2033 |
| Application 15/879,821 | Abandoned not computed | not computed |
3 of 4 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 |
|---|---|---|---|
| Oct 6, 2017 Reel 43804, frame 377 | Kataoka, Kazunori; Miyata, Kanjiro; Nishiyama, Nobuhiro; Osada, Kensuke; Watanabe, Sumiyo; Fukushima, Shigeto; Chaya, Hiroyuki; Takemoto, Hiroyasu | The University of Tokyo | Assignment of Assignor's Interest |
| Oct 6, 2017 Reel 43804, frame 463 | Kato, Yasuki | Nanocarrier Co., Ltd. | Assignment of Assignor's Interest |
| Sep 10, 2024 Reel 68906, frame 705 | Nanocarrier Co., Ltd. | Nano Mrna Co., Ltd. | Change of Name |
| Sep 10, 2024 Reel 68906, frame 758 | Nano Mrna Co., Ltd. | Nano Mrna Co., Ltd. | Change of Address |
| Oct 6, 2026 Reel 76612, frame 183 | Nano Mrna Co., Ltd. | Nano Holdings, Inc. | Change of Name |
| Oct 6, 2026 Reel 76605, frame 25 | Nano Holdings, Inc. | Nano Mrna Co., Ltd. | Company Split |
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.
What's changing
Apr 2033
Term ends Apr 30, 2033. Maintenance fees still fall due before then
Note
The 172 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 9,808,480.
Citations
3
later US patents cite this one
That is above the median of utility patents granted in 2021 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.