Collateral for a security interest recorded Nov 14, 2024 (JPMorgan Chase Bank, N.A.).
Term ends Aug 23, 2033 · High confidence
20-year base term ends Mar 15, 2033
Filed Jun 26, 2013 as application 13/927,740 · Granted Apr 26, 2016
Base term plus 161 days of patent term adjustment (USPTO delay)
Today
2013
2033
Clock starts
Mar 15, 2013
Mar 15, 2013
Term ends
Aug 23, 2033
Aug 23, 2033
Granted
Apr 26, 2016
Apr 26, 2016
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
161
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 9,164,891, to Aug 23, 2033. 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.
10
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 161 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 2 of 3 maintenance fees are paid so far. 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 15, 2013, when application 13/838,699, the earliest non-provisional in its chain, was filed (this one was filed Jun 26, 2013) | Mar 15, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +161 days, USPTO patent term adjustment record | Aug 23, 2033 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,164,891) | resolves to Aug 23, 2033, 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 | In force | High confidence |
| Computed term end | The steps above, in order | Aug 23, 2033 | High confidence |
This family
| US 8,477,143 | Lapsed on the fee record Jul 2025 | Jul 2025 |
| Application PCT/US2009/001416 | PCT application no patent term | no patent term |
| US 10,073,626 | In force Aug 2033 | Aug 2033 |
| US 9,164,891 | In force Sep 2033 | Sep 2033 |
| US 9,323,663 | this patent Aug 2033 | Aug 2033 |
| US 8,842,133 | Lapsed on the fee record Sep 2026 | Sep 2026 |
| US 9,881,353 | Lapsed on the fee record Jan 2026 | Jan 2026 |
| US 9,477,595 | Lapsed on the fee record Oct 2024 | Oct 2024 |
8 of 10 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Sep 16, 2013 Reel 31210, frame 472 | Karamcheti, Vijay; Singhai, Ashish; Mondal, Shibabrata; Kumar, Ajith | Virident Systems Inc. | Assignment of Assignor's Interest |
| May 15, 2017 Reel 42463, frame 876 | Virident Systems, Inc. | Virident Systems, LLC | Change of Name |
| May 24, 2017 Reel 42657, frame 640 | Virident Systems, Inc. | Virident Systems, LLC | Corrective Assignment to Correct the Serial Number 13/827,871 Previously Recorded on Reel 042463 Frame 0876. Assignor(S) Hereby Confirms the 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 |
| 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.
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Alerts on its grants, lapses and transfers.
What's changing
Aug 2033
Term ends Aug 23, 2033. Maintenance fees still fall due before then
Note
The 161 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,164,891, ends no earlier than this term, so it caps nothing.
Citations
217
later US patents cite this one
That is top 5% of utility patents granted in 2016 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.