Term ends Dec 12, 2032 · Low confidence
20-year base term ends Apr 18, 2032
Grace period ended Nov 11, 2026 · no payment on record as of the Nov 10, 2026 fee file · lapse expected
Held by Mpi Corporation
Filed Apr 18, 2012 as application 13/450,460 · Granted Nov 11, 2014
Base term plus 238 days of patent term adjustment (USPTO delay)
Today
2012
2032
Clock starts
Apr 18, 2012
Apr 18, 2012
Term ends
Dec 12, 2032
Dec 12, 2032
Granted
Nov 11, 2014
Nov 11, 2014
base term
patent term adjustment
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
238
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
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 238 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. Confidence: Low: the grace period for its third maintenance fee ended Nov 11, 2026 with no payment on record. 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, 2012, when this application, 13/450,460, was filed | Apr 18, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +238 days, USPTO patent term adjustment record | Dec 12, 2032 | 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 | The grace period ended with no payment on record in the fee file | grace period ended Nov 11, 2026 | Low confidence |
| Computed term end | The steps above, in order | Dec 12, 2032 | Low confidence |
This family
| US 8,884,640 | this patent Dec 2032 | Dec 2032 |
| US 9,519,010 | In force Sep 2032 | Sep 2032 |
| Application 16/596,087 | Abandoned not computed | not computed |
| Application 17/506,173 | Abandoned not computed | not computed |
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 18, 2012 Reel 28069, frame 126 | Wang, Chun-chi; Chang, Chia-tai; Cheng, Ya-yun; Ku, Wei-cheng; Hsieh, Chao-ping | Mpi Corporation | 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
Nov 11
Grace period ended Nov 11, 2026 with no payment on record. The term ends early once USPTO posts the lapse
Dec 2032
Term ends Dec 12, 2032.
Note
The 238 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
7
later US patents cite this one
That is above the median of utility patents granted in 2014 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.