Lapsed Dec 17, 2025 on the fee record · High confidence
20-year base term ends Aug 26, 2028
Third maintenance fee unpaid; grace period ended.
Held by Longitude Licensing Limited
Filed Apr 27, 2011 as application 13/064,942 · Granted Dec 17, 2013
Base term, 20 years from filing, plus 205 days of patent term adjustment (USPTO delay)
Today
Lapsed Dec 17, 2025
2008
2029
Clock starts
Aug 26, 2008
Aug 26, 2008
No longer in force
Dec 17, 2025
Dec 17, 2025
Granted
Dec 17, 2013
Dec 17, 2013
Term would have run to
Mar 19, 2029
Mar 19, 2029
base term
patent term adjustment
after the term ends
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
205
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.
3
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Mar 19, 2029: its 20-year base term plus 205 days of term adjustment for prosecution delay. 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 Aug 26, 2008, when application 12/230,235, the earliest non-provisional in its chain, was filed (this one was filed Apr 27, 2011) | Aug 26, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +205 days, USPTO patent term adjustment record | Mar 19, 2029 | 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 | lapsed Dec 17, 2025 | High confidence |
| Computed term end | The steps above, in order | Dec 17, 2025 | High confidence |
This family
| US 7,948,784 | In force Nov 2029 | Nov 2029 |
| US 8,611,122 | this patent Dec 2025 | Dec 2025 |
| US 9,202,529 | Lapsed on the fee record Dec 2023 | Dec 2023 |
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 29, 2013 Reel 32414, frame 261 | PS4 Luxco S.A.R.L. | Elpida Memory Inc. | Security Agreement |
| May 15, 2014 Reel 32896, frame 1 | Elpida Memory, Inc. | PS4 Luxco S.A.R.L. | Assignment of Assignor's Interest |
| Aug 24, 2016 Reel 39793, frame 880 | PS5 Luxco S.A.R.L. | Longitude Semiconductor S.A.R.L. | Change of Name |
| Aug 24, 2016 Reel 39818, frame 506 | PS4 Luxco S.A.R.L. | PS5 Luxco S.A.R.L. | Assignment of Assignor's Interest |
| Aug 21, 2018 Reel 46865, frame 667 | Longitude Semiconductor S.A.R.L. | Longitude Licensing 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
Note
The 205 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
12
later US patents cite this one
That is above the median 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.