Also listed on SL Corporation, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jun 30, 2031 · High confidence
20-year base term ends Jun 30, 2031
Held by Blue Seed Exosome Ltd.
Filed Apr 12, 2013 as application 13/807,843 · Granted Jun 30, 2015
Base term, 20 years from filing
Today
2011
2031
Clock starts
Jun 30, 2011
Jun 30, 2011
Term ends
Jun 30, 2031
Jun 30, 2031
Granted
Jun 30, 2015
Jun 30, 2015
base term
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
None
Term adjustment
No prosecution delay on this record.
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.
2
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 is its 20-year base term, with no adjustment for 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 Jun 30, 2011, when application PCT/KR2011/004821, the earliest non-provisional in its chain, was filed (this one was filed Apr 12, 2013) | Jun 30, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | Jun 30, 2031 | High confidence |
This family
| US 9,066,971 | this patent Jun 2031 | Jun 2031 |
1 of 2 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 |
|---|---|---|---|
| Apr 12, 2013 Reel 30208, frame 659 | Gho, Yong Song; Kim, Oh Youn; Jang, Su Chul; Yoon, Chang Min; Kim, Yoon Keun | Postech Academy-Industry Foundation | Assignment of Assignor's Interest |
| Nov 8, 2017 Reel 44069, frame 263 | Postech Academy-Industry Foundation | Exosome Bioscience Co., Ltd. | Assignment of Assignor's Interest |
| Jul 6, 2018 Reel 46281, frame 518 | Exosome Bioscience Co., Ltd. | Rosetta Exosome Co., Ltd. | Assignment of Assignor's Interest |
| Jul 10, 2025 Reel 71657, frame 364 | Rosetta Exosome Co., Ltd. | SL Bigen, Inc. | Assignment of Assignor's Interest |
| Sep 23, 2025 Reel 72338, frame 585 | SL Bigen, Inc. | Postech Research and Business Development Foundation | Assignment of Assignor's Interest |
| Dec 29, 2025 Reel 73327, frame 1 | Postech Research and Business Development Foundation | Blue Seed Exosome 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.
What's changing
Jun 2031
Term ends Jun 30, 2031. Maintenance fees still fall due before then
Citations
92
later US patents cite this one
That is top 5% 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.