Term ends Jun 21, 2036 · High confidence
20-year base term ends May 28, 2034
Held by DCB-USA LLC and Kaohsiung Medical University
Filed Mar 14, 2016 as application 14/893,509 · Granted Apr 28, 2020
Base term plus 755 days of patent term adjustment (USPTO delay)
Today
2014
2036
Clock starts
May 28, 2014
May 28, 2014
Term ends
Jun 21, 2036
Jun 21, 2036
Granted
Apr 28, 2020
Apr 28, 2020
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
755
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
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 runs 755 days past its 20-year base term on prosecution delay. 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 May 28, 2014, when application PCT/US2014/039821, the earliest non-provisional in its chain, was filed (this one was filed Mar 14, 2016) | May 28, 2034 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +755 days, USPTO patent term adjustment record | Jun 21, 2036 | 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jun 21, 2036 | High confidence |
This family
| Application PCT/US2014/039821 | PCT application no patent term | no patent term |
| US 10,633,453 | this patent Jun 2036 | Jun 2036 |
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 14, 2016 Reel 37972, frame 410 | Cheng, Tian-lu; Chuang, Chih-hung; Ko, Hsiu-fen; Lu, Yun-chi | DCB-USA LLC; Kaohsiung Medical University | Assignment of Assignor's Interest |
| Mar 14, 2016 reel/frame not recorded | Cheng, Tian-lu; Chuang, Chih-hung; Ko, Hsiu-fen; Lu, Yun-chi | DCB-USA LLC | Assignment of Assignor's Interest |
| Mar 14, 2016 reel/frame not recorded | Cheng, Tian-lu; Chuang, Chih-hung; Ko, Hsiu-fen; Lu, Yun-chi | Kaohsiung Medical University | 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
Jun 2036
Term ends Jun 21, 2036. Maintenance fees still fall due before then
Note
The 755 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
28
later US patents cite this one
That is top 10% of utility patents granted in 2020 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.