Also listed on ML Tech, LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jan 21, 2033 · High confidence
20-year base term ends Sep 24, 2033
Held by Mitsui Chemicals, Inc.
Filed Mar 24, 2015 as application 14/430,802 · Granted May 23, 2017
Base term, 20 years from filing · capped by a resolved terminal disclaimer
Today
2013
2033
Clock starts
Sep 24, 2013
Sep 24, 2013
Term ends
Jan 21, 2033
Jan 21, 2033
Granted
May 23, 2017
May 23, 2017
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 9,372,281.
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. A terminal disclaimer resolved from the filed document caps it earlier. 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 Sep 24, 2013, when application PCT/KR2013/008549, the earliest non-provisional in its chain, was filed (this one was filed Mar 24, 2015) | Sep 24, 2033 | 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 | Disclaimer resolved from the filed document (refs US 9,372,281) | capped to Jan 21, 2033 | 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 | Jan 21, 2033 | High confidence |
This family
| US 9,658,364 | this patent Jan 2033 | Jan 2033 |
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 |
|---|---|---|---|
| Mar 24, 2015 Reel 35243, frame 936 | Jang, Dong Gyu; Roh, Soo Gyun; Kim, Jong Hyo; So, Bong-keun; Seo, Jin-moo | Koc Solution Co., Ltd. | Assignment of Assignor's Interest |
| Mar 24, 2023 Reel 63164, frame 654 | Koc Solution Co., Ltd. | ML Tech Co., Ltd. | Change of Name |
| Apr 26, 2023 Reel 63447, frame 435 | ML Tech Co., Ltd. | Mitsui Chemicals, Inc. | 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
Jan 2033
Term ends Jan 21, 2033. Maintenance fees still fall due before then
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 9,372,281.
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2017 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.