Also listed on Immedia Semiconductor LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Oct 24, 2034 · High confidence
20-year base term ends Sep 2, 2034
Held by K.K. Pangea
Filed Sep 2, 2014 as application 14/475,557 · Granted Dec 19, 2017
Base term plus 52 days of patent term adjustment (USPTO delay)
Today
2014
2034
Clock starts
Sep 2, 2014
Sep 2, 2014
Term ends
Oct 24, 2034
Oct 24, 2034
Granted
Dec 19, 2017
Dec 19, 2017
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
52
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.
This patent's term runs 52 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are 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 Sep 2, 2014, when this application, 14/475,557, was filed | Sep 2, 2034 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +52 days, USPTO patent term adjustment record | Oct 24, 2034 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 24, 2034 | High confidence |
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 |
|---|---|---|---|
| Nov 10, 2014 Reel 34133, frame 260 | Takai, Kosuke | Kabushiki Kaisha Toshiba | Assignment of Assignor's Interest |
| Jun 14, 2017 Reel 42702, frame 623 | Gordon, Stephen E. | Immedia Semiconductor, Inc. | Assignment of Assignor's Interest |
| Jul 14, 2017 Reel 43194, frame 647 | Kabushiki Kaisha Toshiba | Toshiba Memory Corporation | Assignment of Assignor's Interest |
| Jan 22, 2021 Reel 55659, frame 471 | Toshiba Memory Corporation | K.K. Pangea | Merger |
| Jan 22, 2021 Reel 55669, frame 1 | Toshiba Memory Corporation | Kioxia Corporation | Change of Name and Address |
| Jan 22, 2021 Reel 55669, frame 401 | K.K. Pangea | Toshiba Memory Corporation | Change of Name and Address |
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
Oct 2034
Term ends Oct 24, 2034. Maintenance fees still fall due before then
Note
The 52 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2017 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.