Term ends no later than Jul 4, 2028 · Medium confidence
20-year base term ends Oct 9, 2027
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Held by Pure Storage, Inc.
Filed Oct 9, 2007 as application 11/973,621 · Granted Mar 8, 2011
Base term plus 269 days of patent term adjustment (USPTO delay)
Today
2007
2028
Clock starts
Oct 9, 2007
Oct 9, 2007
Ends no later than
Jul 4, 2028
Jul 4, 2028
Granted
Mar 8, 2011
Mar 8, 2011
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
269
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
197
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 269 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. 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 Oct 9, 2007, when this application, 11/973,621, was filed | Oct 9, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +269 days, USPTO patent term adjustment record | Jul 4, 2028 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium 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 | no later than Jul 4, 2028 | Medium confidence |
This family
| US 7,953,937 | Term ended Nov 2025 | Nov 2025 |
| US 7,574,570 | Term ended Jan 2026 | Jan 2026 |
| US 7,574,579 | Term ended Dec 2025 | Dec 2025 |
| US 7,546,427 | Term ended Jun 2026 | Jun 2026 |
| Application PCT/US2007/007120 | PCT application no patent term | no patent term |
| Application PCT/US2007/007119 | PCT application no patent term | no patent term |
| Application PCT/US2007/007285 | PCT application no patent term | no patent term |
| US 8,285,878 | In force Apr 2030 | Apr 2030 |
8 of 197 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 |
|---|---|---|---|
| Oct 9, 2007 Reel 20203, frame 1 | Gladwin, S. Christopher; Dhuse, Greg; Thornton, Vance; Motwani, Manish; Volvovski, Ilya; Leggette, Wesley; Bellanca, Jamie; Toledano, Sara; Foster, Lynn; Mark, Zachary | Cleversafe, LLC | Assignment of Assignor's Interest |
| Feb 2, 2010 Reel 23881, frame 30 | Cleversafe LLC | Cleversafe, Inc. | Change of Name |
| Oct 11, 2011 Reel 27046, frame 203 | Cleversafe, Inc. | Silicon Valley Bank | Security Agreement |
| Aug 20, 2013 Reel 31058, frame 255 | Silicon Valley Bank | Cleversafe, Inc. | Release of Security Interest in Patents |
| May 13, 2016 Reel 38687, frame 596 | Cleversafe, Inc. | International Business Machines Corporation | Assignment of Assignor's Interest |
| Jun 21, 2019 Reel 49556, frame 12 | International Business Machines Corporation | Pure Storage, Inc. | Assignment of Assignor's Interest |
| Jan 14, 2020 Reel 52205, frame 705 | International Business Machines Corporation | Pure Storage, Inc. | Corrective Assignment to Correct the 9992063 and 10334045 Listed in Error Previously Recorded on Reel 049556 Frame 0012. Assignor(S) Hereby Confirms the Assignor Hereby Confirms the Assignment. |
| Aug 26, 2020 Reel 53867, frame 581 | Pure Storage, Inc. | Barclays Bank PLC as Administrative Agent | Security Interest |
| Jun 11, 2025 Reel 71558, frame 523 | Barclays Bank PLC, as Administrative Agent | Pure Storage, Inc. | Termination and Release of Security Interest in Patent Rights |
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
Jul 2028
Term ends no later than Jul 4, 2028. No further fees fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 269 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Jul 4, 2028. We will not guess the cap.
Citations
1,381
later US patents cite this one
That is top 1% 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.