Term ends Dec 4, 2026 · High confidence
20-year base term ended Mar 13, 2026
Held by SanDisk Technologies, Inc.
Filed Mar 13, 2006 as application 11/373,941 · Granted Nov 10, 2009
Base term plus 266 days of patent term adjustment (USPTO delay)
Today
2006
2026
Clock starts
Mar 13, 2006
Mar 13, 2006
Term ends
Dec 4, 2026
Dec 4, 2026
Granted
Nov 10, 2009
Nov 10, 2009
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
266
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 266 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 Mar 13, 2006, when this application, 11/373,941, was filed | Mar 13, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +266 days, USPTO patent term adjustment record | Dec 4, 2026 | 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 | Dec 4, 2026 | High confidence |
This family
| US 7,615,861 | this patent Dec 2026 | Dec 2026 |
| US 8,232,145 | Lapsed on the fee record Jul 2024 | Jul 2024 |
| US 8,482,139 | Lapsed on the fee record Jul 2025 | Jul 2025 |
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 |
|---|---|---|---|
| May 17, 2006 Reel 17631, frame 579 | Chang, Che-jung; Chiu, Chin-tien; Yu, Cheemen; Takiar, Hem; Chien, Jack Chang | SanDisk Corporation | Assignment of Assignor's Interest |
| Mar 8, 2007 Reel 18981, frame 689 | Chang, Che-jung; Chiu, Chin-tien; Yu, Cheemen; Takiar, Hem; Chien, Jack Chang; Liu, Ning | SanDisk Corporation | Assignment of Assignor's Interest |
| Jun 2, 2011 Reel 26378, frame 955 | SanDisk Corporation | SanDisk Technologies Inc. | Assignment of Assignor's Interest |
| May 25, 2016 Reel 38809, frame 472 | 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
Dec 2026
Term ends Dec 4, 2026. No further fees fall due before then
Note
The 266 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
5
later US patents cite this one
That is below the median of utility patents granted in 2009 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.