Lapsed Jan 23, 2026 on the fee record · High confidence
20-year base term ends Jan 24, 2028
Second maintenance fee unpaid; grace period ended.
Held by Quantum Corporation
Filed Mar 9, 2015 as application 14/641,525 · Granted Jan 23, 2018
Base term, 20 years from filing, plus 501 days of patent term adjustment (USPTO delay)
Today
Lapsed Jan 23, 2026
2008
2029
Clock starts
Jan 24, 2008
Jan 24, 2008
No longer in force
Jan 23, 2026
Jan 23, 2026
Granted
Jan 23, 2018
Jan 23, 2018
Term would have run to
Jun 8, 2029
Jun 8, 2029
base term
patent term adjustment
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
501
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
7
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 Jun 8, 2029: its 20-year base term plus 501 days of term adjustment for prosecution delay. 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 Jan 24, 2008, when application 12/019,527, the earliest non-provisional in its chain, was filed (this one was filed Mar 9, 2015) | Jan 24, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +501 days, USPTO patent term adjustment record | Jun 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 | 1 of 2 maintenance fees paid | lapsed Jan 23, 2026 | High confidence |
| Computed term end | The steps above, in order | Jan 23, 2026 | High confidence |
This family
| US 7,979,670 | Lapsed on the fee record Jul 2023 | Jul 2023 |
| US 8,332,616 | In force Feb 2028 | Feb 2028 |
| US 9,047,305 | Lapsed on the fee record Jun 2023 | Jun 2023 |
| US 9,875,271 | this patent Jan 2026 | Jan 2026 |
| US 9,886,470 | Lapsed on the fee record Feb 2026 | Feb 2026 |
| US 9,990,390 | In force Jan 2030 | Jan 2030 |
| Application 15/968,716 | Abandoned not computed | not computed |
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 |
|---|---|---|---|
| Oct 21, 2016 Reel 40451, frame 183 | Quantum Corporation | TCW Asset Management Company LLC, as Agent | Security Interest |
| Oct 25, 2016 Reel 40473, frame 378 | Quantum Corporation | Pnc Bank, National Association | Security Interest |
| Dec 27, 2018 Reel 47988, frame 642 | TCW Asset Management Company LLC, as Agent | Quantum Corporation | Release of Security Interest |
| Dec 27, 2018 Reel 49153, frame 518 | Quantum Corporation, As Grantor; Quantum Lto Holdings, LLC, as Grantor | U.S. Bank National Association, as Agent | Security Interest |
| Jan 8, 2019 Reel 48029, frame 525 | Quantum Corporation | Pnc Bank, National Association | Security Interest |
| Aug 5, 2021 Reel 57107, frame 1 | Quantum Corporation; Quantum Lto Holdings, LLC | Blue Torch Finance LLC, as Agent | Security Interest |
| Aug 10, 2021 reel/frame not recorded | U.S. Bank National Association | Quantum Corporation | Release of Security Interest |
| Aug 10, 2021 reel/frame not recorded | U.S. Bank National Association | Quantum Lto Holdings, LLC | Release of Security Interest |
| Aug 10, 2021 Reel 57142, frame 252 | U.S. Bank National Association | Quantum Corporation; Quantum Lto Holdings, LLC | Release of Security Interest |
| Apr 24, 2025 Reel 71019, frame 850 | Blue Torch Finance LLC, as Agent for the Secured Parties | Alter Domus (US) LLC, as Agent for the Secured Parties | Assignment of Assignor's Interest |
| Aug 19, 2025 Reel 72542, frame 594 | PNC Bank, National Association, as Agent | Quantum Corporation | Termination and Release of Amended and Restated Intellectual Property Security Agreement at Reel/Frame No. 48029/0525 |
| Oct 8, 2025 Reel 73061, frame 454 | PNC Bank, National Association, as Agent | Quantum Corporation | Termination and Release of Intellectual Property Security Agreement at Reel/Frame No. 40473/0378 |
| Dec 18, 2025 Reel 74024, frame 84 | Quantum Corporation | U.S. Bank Trust Company, National Association, as Agent | Intellectual Property Security Agreement |
| Jul 3, 2026 Reel 75901, frame 285 | U.S. Bank Trust Company, National Association | Quantum Corporation; Quantum Lto Holdings, LLC | Release of Security Interest |
| Jul 3, 2026 Reel 76712, frame 936 | Alter Domus (US) LLC | Quantum Corporation; Quantum Lto Holdings, LLC | Release of Security Interest |
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
Note
The 501 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
3
later US patents cite this one
That is below the median of utility patents granted in 2018 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.