Also listed on Schooner Information Technology, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jul 1, 2031 · High confidence
20-year base term ends Jun 28, 2031
Held by SanDisk Technologies, Inc.
Filed Jun 28, 2011 as application 13/170,955 · Granted Feb 10, 2015
Base term plus 3 days of patent term adjustment (USPTO delay)
Today
2011
2031
Clock starts
Jun 28, 2011
Jun 28, 2011
Term ends
Jul 1, 2031
Jul 1, 2031
Granted
Feb 10, 2015
Feb 10, 2015
base term
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
3
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 3 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 Jun 28, 2011, when this application, 13/170,955, was filed | Jun 28, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +3 days, USPTO patent term adjustment record | Jul 1, 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 | In force | High confidence |
| Computed term end | The steps above, in order | Jul 1, 2031 | 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 |
|---|---|---|---|
| Sep 16, 2011 Reel 26921, frame 285 | George, Johann; Dinker, Darpan; Krishnan, Manavalan; O'krafka, Brian W. | 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 |
| Jan 12, 2024 Reel 66114, frame 298 | SanDisk Technologies LLC | Western Digital Technologies, Inc. | Assignment of Assignor's Interest |
| Feb 22, 2024 Reel 66648, frame 206 | Western Digital Technologies, Inc. | JPMorgan Chase Bank, N.A., as the Agent | Patent Collateral Agreement (DDTL) |
| Feb 22, 2024 Reel 66648, frame 284 | Western Digital Technologies, Inc. | JPMorgan Chase Bank, N.A., as the Agent | Patent Collateral Agreement (AR) |
| Oct 11, 2024 Reel 69169, frame 572 | Western Digital Technologies, Inc. | SanDisk Technologies, Inc. | Assignment of Assignor's Interest |
| Nov 14, 2024 Reel 69411, frame 486 | SanDisk Technologies, Inc. | JPMorgan Chase Bank, N.A., as Collateral Agent | Security Agreement (SUPPLEMENTAL) |
| 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
Jul 2031
Term ends Jul 1, 2031.
Note
The 3 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
32
later US patents cite this one
That is top 25% of utility patents granted in 2015 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.