Also listed on SanDisk, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends no later than Jun 19, 2029 · Low confidence
20-year base term ends Apr 15, 2028
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Held by SanDisk Technologies, Inc.
Filed Apr 15, 2009 as application 12/424,461 · Granted May 15, 2012
Base term plus 430 days of patent term adjustment (USPTO delay)
Today
2008
2029
Clock starts
Apr 15, 2008
Apr 15, 2008
Ends no later than
Jun 19, 2029
Jun 19, 2029
Granted
May 15, 2012
May 15, 2012
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
430
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
6
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 430 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. Confidence: Low. 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 Apr 15, 2008, when applications 12/103,273 and 12/103,277, the earliest non-provisional applications in its chain, were filed (this one was filed Apr 15, 2009); a parent in its chain could not be resolved (the next row) | Apr 15, 2028 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +430 days, USPTO patent term adjustment record | Jun 19, 2029 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium 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 | no later than Jun 19, 2029 | Low confidence |
This family
| US 8,566,505 | In force Jan 2030 | Jan 2030 |
| US 8,028,123 | In force Jan 2030 | Jan 2030 |
| Application 12/424,464 | Abandoned not computed | not computed |
| US 8,180,954 | this patent no later than Jun 2029 | no later than Jun 2029 |
| US 8,185,778 | In force May 2029 | May 2029 |
| US 8,271,722 | Lapsed on the fee record Sep 2024 | Sep 2024 |
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 11, 2009 Reel 22666, frame 738 | Kilzer, Kevin L.; Ellis, Robert W.; Sterbenz, Rudolph J. | Adtron, Inc. | Assignment of Assignor's Interest |
| Jul 13, 2011 Reel 26585, frame 407 | Kilzer, Kevin L.; Ellis, Robert W.; Sterbenz, Rudolph J. | Adtron Corporation | Nunc Pro Tunc Assignment |
| Jul 13, 2011 Reel 26587, frame 441 | Adtron Corporation | Smart Modular Technologies (Az), Inc. | Change of Name |
| May 29, 2013 Reel 30508, frame 843 | Smart Modular Technologies (Az), Inc. | Smart Storage Systems (Az), Inc. | Change of Name |
| May 29, 2013 Reel 30508, frame 855 | Smart Storage Systems (Az), Inc. | Smart Storage Systems, Inc. | Change of Name |
| Mar 29, 2016 Reel 38290, frame 33 | Smart Storage Systems, Inc. | 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
Jun 2029
Term ends no later than Jun 19, 2029. No further fees fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 430 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Jun 19, 2029. We will not guess the cap.
Citations
95
later US patents cite this one
That is top 10% of utility patents granted in 2012 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.