Lapsed May 13, 2026 on the fee record · High confidence
20-year base term ends Jan 3, 2031
Third maintenance fee unpaid; grace period ended.
Held by SanDisk Technologies, Inc.
Filed Jan 3, 2011 as application 12/983,754 · Granted May 13, 2014
USPTO first gave this application the number US 8,621,155 and withdrew it before it issued. That number now leads here.
Base term, 20 years from filing, plus 295 days of patent term adjustment (USPTO delay)
Today
Lapsed May 13, 2026
2011
2031
Clock starts
Jan 3, 2011
Jan 3, 2011
No longer in force
May 13, 2026
May 13, 2026
Granted
May 13, 2014
May 13, 2014
Term would have run to
Oct 25, 2031
Oct 25, 2031
base term
patent term adjustment
after the term ends
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
295
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.
Its term would have run to Oct 25, 2031: its 20-year base term plus 295 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 Jan 3, 2011, when this application, 12/983,754, was filed | Jan 3, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +295 days, USPTO patent term adjustment record | Oct 25, 2031 | 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 May 13, 2026 | High confidence |
| Computed term end | The steps above, in order | May 13, 2026 | High confidence |
This family
| US 8,725,951 | this patent May 2026 | May 2026 |
| US 8,677,055 | In force Nov 2031 | Nov 2031 |
| US 8,700,842 | In force Nov 2031 | Nov 2031 |
| US 8,694,733 | Lapsed on the fee record Apr 2022 | Apr 2022 |
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 |
|---|---|---|---|
| Jan 24, 2011 Reel 25687, frame 341 | Busch, John; Dinker, Darpan; Ouye, Darryl | Schooner Information Technology, Inc. | Assignment of Assignor's Interest |
| Aug 2, 2012 Reel 28710, frame 950 | Schooner Information Technology, Inc. | SanDisk Enterprise IP, LLC | Assignment of Assignor's Interest |
| Mar 29, 2016 Reel 38295, frame 225 | SanDisk Enterprise IP LLC | SanDisk Technologies Inc. | Assignment of Assignor's Interest |
| May 25, 2016 Reel 38807, frame 850 | SanDisk Technologies Inc. | SanDisk Technologies LLC | Change of Name |
| Dec 31, 2024 Reel 69796, frame 423 | SanDisk Technologies LLC | SanDisk Technologies, Inc. | Assignment of Assignor's Interest |
| Apr 25, 2025 Reel 71050, frame 1 | SanDisk Technologies, Inc. | JPMorgan Chase Bank, N.A., as Collateral Agent | Security Agreement |
| Apr 25, 2025 Reel 71382, frame 1 | JPMorgan Chase Bank, N.A., as Agent | SanDisk Technologies, Inc. | Partial Release of Security Interests |
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
Note
The 295 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
44
later US patents cite this one
That is top 25% 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.