Term ends Nov 24, 2029 · High confidence
20-year base term ends Aug 26, 2028
Held by Longitude Licensing Limited
Filed Aug 26, 2008 as application 12/230,235 · Granted May 24, 2011
Base term plus 455 days of patent term adjustment (USPTO delay)
Today
2008
2029
Clock starts
Aug 26, 2008
Aug 26, 2008
Term ends
Nov 24, 2029
Nov 24, 2029
Granted
May 24, 2011
May 24, 2011
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
455
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
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 455 days past its 20-year base term on 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 Aug 26, 2008, when this application, 12/230,235, was filed | Aug 26, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +455 days, USPTO patent term adjustment record | Nov 24, 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 24, 2029 | High confidence |
This family
| US 7,948,784 | this patent Nov 2029 | Nov 2029 |
| US 8,611,122 | Lapsed on the fee record 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 |
|---|---|---|---|
| Aug 26, 2008 Reel 21493, frame 346 | Kajigaya, Kazuhiko | Elpida Memory, Inc. | Assignment of Assignor's Interest |
| 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Nov 2029
Term ends Nov 24, 2029. No further fees fall due before then
Note
The 455 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
104
later US patents cite this one
That is top 10% of utility patents granted in 2011 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.