Also listed on Hitachi Global Storage Technologies, an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Aug 21, 2023 (JPMorgan Chase Bank, N.A.).
Term ends Dec 8, 2029 · High confidence
20-year base term ends Jun 20, 2027
Filed Jun 20, 2007 as application 11/765,662 · Granted Mar 15, 2011
Base term plus 902 days of patent term adjustment (USPTO delay)
Today
2007
2029
Clock starts
Jun 20, 2007
Jun 20, 2007
Term ends
Dec 8, 2029
Dec 8, 2029
Granted
Mar 15, 2011
Mar 15, 2011
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
902
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.
This patent's term runs 902 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 Jun 20, 2007, when this application, 11/765,662, was filed | Jun 20, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +902 days, USPTO patent term adjustment record | Dec 8, 2029 | 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 | Dec 8, 2029 | High confidence |
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 |
|---|---|---|---|
| Jun 20, 2007 Reel 19455, frame 562 | Chan, Andre S.; Chiang, Chisin; Hendriks, Ferdinand; Johnson, Brad Vaughn | Hitachi Global Storage Technologies | Assignment of Assignor's Interest |
| Oct 25, 2012 Reel 29341, frame 777 | Hitachi Global Storage Technologies Netherlands B.V. | HGST Netherlands B.V. | Change of Name |
| Dec 6, 2016 Reel 40821, frame 550 | HGST Netherlands B.V. | Western Digital Technologies, Inc. | Assignment of Assignor's Interest |
| Feb 6, 2020 Reel 52915, frame 566 | Western Digital Technologies, Inc. | JPMorgan Chase Bank, N.A., as Agent | Security Interest |
| Feb 8, 2022 Reel 59127, frame 1 | Jpmorgan Chase Bank, N.a. | Western Digital Technologies, Inc. | Release of Security Interest at Reel 052915 Frame 0566 |
| 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
Dec 2029
Term ends Dec 8, 2029. No further fees fall due before then
Note
The 902 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is below the median of utility patents granted in 2011 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.