Term ends no later than Sep 3, 2033 · Medium confidence
20-year base term ends Jul 18, 2033
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Filed Jul 18, 2013 as application 13/945,237 · Granted Jun 23, 2015
Base term plus 47 days of patent term adjustment (USPTO delay)
Today
2013
2033
Clock starts
Jul 18, 2013
Jul 18, 2013
Ends no later than
Sep 3, 2033
Sep 3, 2033
Granted
Jun 23, 2015
Jun 23, 2015
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
47
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
3
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 47 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 2 of 3 maintenance fees are paid so far. Confidence: Medium. 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 Jul 18, 2013, when this application, 13/945,237, was filed | Jul 18, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +47 days, USPTO patent term adjustment record | Sep 3, 2033 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium 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 | no later than Sep 3, 2033 | Medium confidence |
This family
| US 9,063,128 | this patent no later than Sep 2033 | no later than Sep 2033 |
| US 9,689,854 | In force no later than Apr 2034 | no later than Apr 2034 |
| US 9,612,203 | Lapsed on the fee record Apr 2025 | Apr 2025 |
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 |
|---|---|---|---|
| Jul 22, 2013 Reel 30846, frame 441 | Kuan, Chen-meng; Langer, Robert S.; Cheng, Chao-min | National Tsing Hua University | Assignment of Assignor's Interest |
| Jul 4, 2024 Reel 67913, frame 169 | National Tsing Hua University | Quantum Nil Limited Taiwan Branch | Nunc Pro Tunc Assignment |
| Dec 4, 2024 reel/frame not recorded | Quantum Nil Limited Taiwan Branch | Quantum Nil Corporation | Assignment of Assignor's Interest |
| Dec 4, 2024 reel/frame not recorded | Quantum Nil Limited Taiwan Branch | Quantum Nil Technology Pte. Ltd. | Assignment of Assignor's Interest |
| Dec 4, 2024 Reel 69485, frame 242 | Quantum Nil Limited Taiwan Branch | Quantum Nil Corporation; Quantum Nil Technology Pte. Ltd. | Assignment of Assignor's Interest |
| Dec 16, 2024 reel/frame not recorded | Quantum Nil Limited Taiwan Branch | Quantum Nil Corporation | Corrective Assignment to Correct the 2ND Assignee's Country Address Previously Recorded at Reel: 69485 Frame: 242. Assignor(S) Hereby Confirms the Assignment. |
| Dec 16, 2024 reel/frame not recorded | Quantum Nil Limited Taiwan Branch | Quantum Nil Technology Pte. Ltd. | Corrective Assignment to Correct the 2ND Assignee's Country Address Previously Recorded at Reel: 69485 Frame: 242. Assignor(S) Hereby Confirms the Assignment. |
| Dec 16, 2024 Reel 69712, frame 865 | Quantum Nil Limited Taiwan Branch | Quantum Nil Corporation; Quantum Nil Technology Pte. Ltd. | Corrective Assignment to Correct the 2ND Assignee's Country Address Previously Recorded at Reel: 69485 Frame: 242. Assignor(S) Hereby Confirms the Assignment. |
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.
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Alerts on its grants, lapses and transfers.
What's changing
Sep 2033
Term ends no later than Sep 3, 2033. Maintenance fees still fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 47 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Sep 3, 2033. We will not guess the cap.
Citations
0
later US patents cite this one
That is below the median 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.