Also listed on Fujitsu Semiconductor Limited, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jul 13, 2031 · High confidence
20-year base term ends Jul 13, 2031
Held by Transphorm Japan, Inc.
Filed Mar 5, 2013 as application 13/786,431 · Granted Sep 17, 2013
Base term, 20 years from filing
Today
2011
2031
Clock starts
Jul 13, 2011
Jul 13, 2011
Term ends
Jul 13, 2031
Jul 13, 2031
Granted
Sep 17, 2013
Sep 17, 2013
base term
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.
None
Terminal disclaimer
No disclaimer on this record.
3 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. All three maintenance fees are recorded paid; no more fees are due. 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 Jul 13, 2011, when application 13/181,710, the earliest non-provisional in its chain, was filed (this one was filed Mar 5, 2013) | Jul 13, 2031 | 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jul 13, 2031 | High confidence |
This family
| Application 13/181,710 | Abandoned not computed | not computed |
| US 8,536,622 | this patent Jul 2031 | Jul 2031 |
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 |
|---|---|---|---|
| May 9, 2014 Reel 32865, frame 131 | Fujitsu Semiconductor Limited | Transphorm Japan, Inc. | Assignment of Assignor's Interest |
| Aug 7, 2014 Reel 33491, frame 295 | Takemae, Yoshihiro; Hosoda, Tsutomu | Fujitsu Semiconductor Limited | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Jul 2031
Term ends Jul 13, 2031. No further fees fall due before then
Citations
32
later US patents cite this one
That is top 25% of utility patents granted in 2013 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.