Collateral for a security interest recorded Aug 21, 2023 (JPMorgan Chase Bank, N.A.).
Lapsed Oct 25, 2024 on the fee record · High confidence
20-year base term ends Mar 15, 2033
Second maintenance fee unpaid; grace period ended.
Filed Sep 14, 2015 as application 14/852,844 · Granted Oct 25, 2016
Base term, 20 years from filing
Today
Lapsed Oct 25, 2024
2013
2033
Clock starts
Mar 15, 2013
Mar 15, 2013
No longer in force
Oct 25, 2024
Oct 25, 2024
Granted
Oct 25, 2016
Oct 25, 2016
Term would have run to
Mar 15, 2033
Mar 15, 2033
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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 9,164,891, to Mar 15, 2033. The term already ends on or before that date, so the cap shortened nothing.
1 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.
Its term would have run to Mar 15, 2033: 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 Mar 15, 2013, when application 13/838,699, the earliest non-provisional in its chain, was filed (this one was filed Sep 14, 2015) | Mar 15, 2033 | 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 9,164,891) | resolves to Mar 15, 2033, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | lapsed Oct 25, 2024 | High confidence |
| Computed term end | The steps above, in order | Oct 25, 2024 | 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 | In force 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 | this patent 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, 2015 Reel 36580, frame 368 | 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 |
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.
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
8
later US patents cite this one
That is above the median 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.