Collateral for a security interest recorded Aug 21, 2023 (JPMorgan Chase Bank, N.A.).
Lapsed Apr 3, 2024 on the fee record · High confidence
20-year base term ends Feb 7, 2027
Third maintenance fee unpaid; grace period ended.
Filed Sep 24, 2009 as application 12/566,453 · Granted Apr 3, 2012
Base term, 20 years from filing
Today
Lapsed Apr 3, 2024
2007
2027
Clock starts
Feb 7, 2007
Feb 7, 2007
No longer in force
Apr 3, 2024
Apr 3, 2024
Granted
Apr 3, 2012
Apr 3, 2012
Term would have run to
Feb 7, 2027
Feb 7, 2027
base term
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 7,596,643, to Feb 7, 2027. The term already ends on or before that date, so the cap shortened nothing.
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.
3
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 Feb 7, 2027: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 application 11/672,435, the earliest non-provisional in its chain, was filed (this one was filed Sep 24, 2009) | Feb 7, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,596,643) | resolves to Feb 7, 2027, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | lapsed Apr 3, 2024 | High confidence |
| Computed term end | The steps above, in order | Apr 3, 2024 | High confidence |
This family
| US 7,596,643 | In force Jun 2027 | Jun 2027 |
| Application PCT/US2008/052358 | PCT application no patent term | no patent term |
| US 8,151,020 | this patent 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 |
|---|---|---|---|
| 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 |
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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 7,596,643, ends no earlier than this term, so it caps nothing.
Citations
164
later US patents cite this one
That is top 5% 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
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.