Term ends Jul 27, 2034 · High confidence
20-year base term ends Apr 18, 2033
Held by Mitsui Chemicals, Inc.
Filed Apr 25, 2014 as application 14/262,495 · Granted Jul 23, 2019
Base term plus 514 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2013
2034
Clock starts
Apr 18, 2013
Apr 18, 2013
Term ends
Jul 27, 2034
Jul 27, 2034
Granted
Jul 23, 2019
Jul 23, 2019
base term
patent term adjustment
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
514
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 9,456,963.
1 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.
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 514 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 1 of 3 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 18, 2013, when application 13/865,907, the earliest non-provisional in its chain, was filed (this one was filed Apr 25, 2014) | Apr 18, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +514 days, USPTO patent term adjustment record | Sep 14, 2034 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,456,963) | capped to Jul 27, 2034 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jul 27, 2034 | High confidence |
This family
| US 9,456,963 | Lapsed on the fee record Oct 2024 | Oct 2024 |
| US 10,357,435 | this patent Jul 2034 | Jul 2034 |
| Application 15/212,137 | Abandoned not computed | not computed |
| US 10,568,814 | Lapsed on the fee record Feb 2024 | Feb 2024 |
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 25, 2014 Reel 32764, frame 553 | Lee, Jae Sik | Dentca, Inc. | Assignment of Assignor's Interest |
| Mar 21, 2025 Reel 70590, frame 314 | Dentca, Inc. | 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
Jul 2034
Term ends Jul 27, 2034. Maintenance fees still fall due before then
Note
The 514 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 9,456,963.
Citations
64
later US patents cite this one
That is top 5% of utility patents granted in 2019 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.