Collateral for a security interest recorded Nov 14, 2024 (JPMorgan Chase Bank, N.A.).
Term ends Jun 4, 2027 · High confidence
20-year base term ends Feb 7, 2027
Filed Feb 7, 2007 as application 11/672,435 · Granted Sep 29, 2009
Base term plus 117 days of patent term adjustment (USPTO delay)
Today
2007
2027
Clock starts
Feb 7, 2007
Feb 7, 2007
Term ends
Jun 4, 2027
Jun 4, 2027
Granted
Sep 29, 2009
Sep 29, 2009
base term
patent term adjustment
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
117
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 117 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 Feb 7, 2007, when this application, 11/672,435, was filed | Feb 7, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +117 days, USPTO patent term adjustment record | Jun 4, 2027 | 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 | Jun 4, 2027 | High confidence |
This family
| US 7,596,643 | this patent Jun 2027 | Jun 2027 |
| Application PCT/US2008/052358 | PCT application no patent term | no patent term |
| US 8,151,020 | Lapsed on the fee record Apr 2024 | Apr 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 |
|---|---|---|---|
| Feb 8, 2007 Reel 18868, frame 706 | Merry, David E., JR.; Diggs, Mark S. | Siliconsystems, Inc. | Assignment of Assignor's Interest |
| Oct 23, 2015 Reel 36872, frame 17 | Siliconsystems, Inc. | Western Digital Technologies, Inc. | Assignment of Assignor's Interest |
| Mar 9, 2016 Reel 37936, frame 204 | Siliconsystems, Inc. | Western Digital Technologies, Inc. | Assignment of Assignor's Interest |
| May 17, 2016 Reel 38744, frame 481 | Western Digital Technologies, Inc. | JPMorgan Chase Bank, N.A., as Collateral Agent | Security Agreement |
| May 17, 2016 Reel 38744, frame 281 | Western Digital Technologies, Inc. | U.S. Bank National Association, as Collateral Agent | Security Agreement |
| Mar 5, 2018 Reel 45501, frame 714 | U.S. Bank National Association, as Collateral Agent | Western Digital Technologies, Inc. | Release of Security Interest |
| Feb 8, 2022 Reel 58982, frame 556 | Jpmorgan Chase Bank, N.a. | Western Digital Technologies, Inc. | Release of Security Interest at Reel 038744 Frame 0481 |
| Aug 21, 2023 Reel 64715, frame 1 | Western Digital Technologies, Inc. | Jpmorgan Chase Bank, N.a. | Patent Collateral Agreement - A&r Loan Agreement |
| Aug 21, 2023 Reel 67045, frame 156 | Western Digital Technologies, Inc. | Jpmorgan Chase Bank, N.a. | Patent Collateral Agreement - DDTL Loan Agreement |
| May 29, 2024 Reel 67567, frame 682 | Western Digital Technologies, Inc. | SanDisk Technologies, Inc. | Assignment of Assignor's Interest |
| Jun 27, 2024 Reel 67982, frame 32 | SanDisk Technologies, Inc. | SanDisk Technologies, Inc. | Change of Name |
| Aug 23, 2024 Reel 68762, frame 494 | SanDisk Technologies, Inc. | JPMorgan Chase Bank, N.A., as the Agent | Patent Collateral Agreement |
| Oct 11, 2024 Reel 69168, frame 273 | SanDisk Technologies, Inc. | Western Digital Technologies, Inc. | Assignment of Assignor's Interest |
| Nov 14, 2024 Reel 69411, frame 208 | Western Digital Technologies, Inc. | JPMorgan Chase Bank, N.A., as Collateral Agent | Security Agreement (SUPPLEMENTAL) |
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 2027
Term ends Jun 4, 2027. No further fees fall due before then
Note
The 117 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
331
later US patents cite this one
That is top 1% 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.