Term ends Dec 1, 2026 · Medium confidence
20-year base term ends Sep 30, 2035
Held by Pure Storage, Inc.
Filed Feb 18, 2019 as application 16/278,551 · Granted Jan 5, 2021
Base term plus 138 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2015
2035
Clock starts
Sep 30, 2015
Sep 30, 2015
Term ends
Dec 1, 2026
Dec 1, 2026
Granted
Jan 5, 2021
Jan 5, 2021
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
138
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 10,211,983.
1 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.
5
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 138 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 1 of 1 maintenance fees is paid so far. Confidence: Medium. 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 Sep 30, 2015, when application 14/871,662, the earliest non-provisional in its chain, was filed (this one was filed Feb 18, 2019) | Sep 30, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +138 days, USPTO patent term adjustment record | Feb 15, 2036 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,211,983) | capped to Dec 1, 2026 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 1 maintenance fees paid | In force | High confidence |
| Further caveats on record | The record rates this date lower than the steps above account for | Medium confidence overall | Medium confidence |
| Computed term end | The steps above, in order | Dec 1, 2026 | Medium confidence |
This family
| US 9,768,953 | Lapsed on the fee record Sep 2025 | Sep 2025 |
| US 10,211,983 | In force Dec 2026 | Dec 2026 |
| US 10,887,099 | this patent Dec 2026 | Dec 2026 |
| US 11,489,668 | In force Dec 2026 | Dec 2026 |
| US 11,838,412 | In force Dec 2026 | Dec 2026 |
The applications whose file history this site holds. The family may have others.
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 2026
Term ends Dec 1, 2026. No further fees fall due before then
Note
The 138 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 10,211,983.
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2021 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.