Also listed on Contour Semiconductor, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Nov 14, 2024 (JPMorgan Chase Bank, N.A.).
Term ends Apr 30, 2031 · High confidence
20-year base term ends Mar 10, 2030
Filed Mar 10, 2010 as application 12/720,843 · Granted Jul 8, 2014
Base term plus 416 days of patent term adjustment (USPTO delay)
Today
2010
2031
Clock starts
Mar 10, 2010
Mar 10, 2010
Term ends
Apr 30, 2031
Apr 30, 2031
Granted
Jul 8, 2014
Jul 8, 2014
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
416
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.
2
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 416 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 Mar 10, 2010, when this application, 12/720,843, was filed | Mar 10, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +416 days, USPTO patent term adjustment record | Apr 30, 2031 | 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 | Apr 30, 2031 | High confidence |
This family
| US 8,773,881 | this patent Apr 2031 | Apr 2031 |
| US 9,305,624 | Lapsed on the fee record 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 |
|---|---|---|---|
| May 6, 2010 Reel 24346, frame 245 | Shepard, Daniel R. | Contour Semiconductor, Inc. | Assignment of Assignor's Interest |
| Jan 18, 2013 Reel 29659, frame 615 | Contour Semiconductor, Inc. | American Capital, Ltd.; Still River Fund III, Limited Partnership; Running Deer Trust; Running Deer Foundation; Sarah G. Kurzon 2001 Revocable Trust; Perrin, Donald | Security Agreement |
| Jan 18, 2013 reel/frame not recorded | Contour Semiconductor, Inc. | American Capital, Ltd. | Security Agreement |
| Jan 18, 2013 reel/frame not recorded | Contour Semiconductor, Inc. | Still River Fund III, Limited Partnership | Security Agreement |
| Jan 18, 2013 reel/frame not recorded | Contour Semiconductor, Inc. | Running Deer Trust | Security Agreement |
| Jan 18, 2013 reel/frame not recorded | Contour Semiconductor, Inc. | Running Deer Foundation | Security Agreement |
| Jan 18, 2013 reel/frame not recorded | Contour Semiconductor, Inc. | Sarah G. Kurzon 2001 Revocable Trust | Security Agreement |
| Jan 18, 2013 reel/frame not recorded | Contour Semiconductor, Inc. | Perrin, Donald | Security Agreement |
| May 30, 2014 Reel 33063, frame 617 | Contour Semiconductor, Inc. | American Capital, Ltd. | Security Interest |
| Jun 20, 2014 Reel 33204, frame 428 | Contour Semiconductor, Inc. | American Capital, Ltd.; Still River Fund III, Limited Partnership; Sarah G. Kurzon 2001 Revocable Trust; Ovonyx, Inc.; Perrin, Donald; Running Deer Foundation; Running Deer Trust | Security Interest |
| Jun 20, 2014 reel/frame not recorded | Contour Semiconductor, Inc. | American Capital, Ltd. | Security Interest |
| Jun 20, 2014 reel/frame not recorded | Contour Semiconductor, Inc. | Still River Fund III, Limited Partnership | Security Interest |
| Jun 20, 2014 reel/frame not recorded | Contour Semiconductor, Inc. | Sarah G. Kurzon 2001 Revocable Trust | Security Interest |
| Jun 20, 2014 reel/frame not recorded | Contour Semiconductor, Inc. | Ovonyx, Inc. | Security Interest |
| Jun 20, 2014 reel/frame not recorded | Contour Semiconductor, Inc. | Perrin, Donald | Security Interest |
| Jun 20, 2014 reel/frame not recorded | Contour Semiconductor, Inc. | Running Deer Foundation | Security Interest |
| Jun 20, 2014 reel/frame not recorded | Contour Semiconductor, Inc. | Running Deer Trust | Security Interest |
| Jun 24, 2014 Reel 33225, frame 330 | American Capital, Ltd. | Contour Semiconductor, Inc. | Release of Security Interest |
| May 15, 2015 Reel 35685, frame 571 | American Capital, Ltd.; Still River Fund III, Limited Partnership; Sarah G. Kurzon 2001 Revocable Trust; Ovonyx, Inc.; Perrin, Donald; Running Deer Foundation; Running Deer Trust | Contour Semiconductor, Inc. | Release of Security Interest |
| May 20, 2015 Reel 35749, frame 956 | American Capital, Ltd.; Still River Fund III, Limited Partnership; Sarah G. Kurzon 2001 Revocable Trust; Ovonyx, Inc.; Perrin, Donald; Running Deer Foundation; Running Deer Trust | Contour Semiconductor, Inc. | Release of Security Interest |
| May 21, 2015 Reel 35748, frame 909 | Contour Semiconductor, Inc. | HGST Netherlands B.V. | Assignment of Assignor's Interest |
| Jun 2, 2015 Reel 35831, frame 594 | Contour Semiconductor, Inc. | HGST, Inc. | Corrective Assignment to Correct the Name and Address of the Assignee Previously Recorded on Reel 035748 Frame 0909. Assignor(S) Hereby Confirms the Name and Address of the Assignee Si HGST, INC.,3403 Yerba Buena Road,san Jose, Ca 95135. |
| Jul 19, 2016 Reel 39389, frame 684 | HGST, Inc. | JPMorgan Chase Bank, N.A., as Collateral Agent | Security Agreement |
| Aug 16, 2016 Reel 39689, frame 950 | JPMorgan Chase Bank, N.A., as Collateral Agent | HGST, Inc. | Release of Security Interest |
| Aug 24, 2018 Reel 46939, frame 587 | HGST, Inc. | Western Digital Technologies, Inc. | Assignment of Assignor's Interest |
| Feb 8, 2022 Reel 58965, frame 535 | Jpmorgan Chase Bank, N.a. | Western Digital Technologies, Inc. | Release of Security Interest at Reel 039389 Frame 0684 |
| 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Apr 2031
Term ends Apr 30, 2031. No further fees fall due before then
Note
The 416 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
315
later US patents cite this one
That is top 1% of utility patents granted in 2014 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.