Collateral for a security interest recorded Aug 21, 2023 (JPMorgan Chase Bank, N.A.).
Lapsed Apr 10, 2024 on the fee record · Medium confidence
20-year base term ends Nov 5, 2027
Why Medium: A terminal disclaimer is on file (approved) with no resolved reference, so the term may end earlier.
Third maintenance fee unpaid; grace period ended.
Filed Aug 9, 2010 as application 12/853,135 · Granted Apr 10, 2012
Base term, 20 years from filing
Today
Lapsed Apr 10, 2024
2007
2027
Clock starts
Nov 5, 2007
Nov 5, 2007
No longer in force
Apr 10, 2024
Apr 10, 2024
Granted
Apr 10, 2012
Apr 10, 2012
Term would have run to
Nov 5, 2027
Nov 5, 2027
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
5
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 Nov 5, 2027: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. Confidence: Medium. 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 Nov 5, 2007, when application 11/935,224, the earliest non-provisional in its chain, was filed (this one was filed Aug 9, 2010) | Nov 5, 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 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 | 2 of 3 maintenance fees paid | lapsed Apr 10, 2024 | High confidence |
| Computed term end | The steps above, in order | Apr 10, 2024 | Medium confidence |
This family
| US 7,774,556 | In force Feb 2029 | Feb 2029 |
| US 8,156,288 | this patent Apr 2024 | Apr 2024 |
| US 8,555,002 | Lapsed on the fee record Oct 2025 | Oct 2025 |
| US 9,262,333 | In force no later than Nov 2027 | no later than Nov 2027 |
| US 9,672,158 | Lapsed on the fee record Jun 2025 | Jun 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 |
|---|---|---|---|
| Aug 11, 2010 Reel 24820, frame 669 | Karamcheti, Vijay; Okin, Kenneth A.; Ganapathy, Kumar; Singhai, Ashish; Parekh, Rajesh | Virident Systems Inc. | Assignment of Assignor's Interest |
| May 12, 2017 Reel 42457, frame 58 | Virident Systems, Inc. | Virident Systems, LLC | Change of Name |
| Jul 9, 2020 Reel 53180, frame 472 | Virident Systems, LLC | Western Digital Technologies, Inc. | Assignment of Assignor's Interest |
| Sep 29, 2020 Reel 53926, frame 446 | Western Digital Technologies, Inc. | JPMorgan Chase Bank, N.A., as Agent | Security Interest |
| Feb 8, 2022 Reel 58966, frame 321 | Jpmorgan Chase Bank, N.a. | Western Digital Technologies, Inc. | Release of Security Interest at Reel 053926 Frame 0446 |
| 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.
What's changing
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Apr 10, 2024. We will not guess the cap.
Citations
54
later US patents cite this one
That is top 25% 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.