Term ended Jun 30, 2026 · High confidence
20-year base term ended Sep 30, 2025
Held by Pure Storage, Inc.
Filed Apr 13, 2006 as application 11/403,391 · Granted Jun 9, 2009
Base term plus 273 days of patent term adjustment (USPTO delay)
Today
Term ended Jun 30, 2026
2005
2026
Clock starts
Sep 30, 2005
Sep 30, 2005
Term ended
Jun 30, 2026
Jun 30, 2026
Granted
Jun 9, 2009
Jun 9, 2009
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
273
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.
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 273 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. 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 Sep 30, 2005, when application 11/241,555, the earliest non-provisional in its chain, was filed (this one was filed Apr 13, 2006) | Sep 30, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +273 days, USPTO patent term adjustment record | Jun 30, 2026 | 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 | term ended | High confidence |
| Computed term end | The steps above, in order | Jun 30, 2026 | High 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 | this patent 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 |
|---|---|---|---|
| Sep 8, 2006 Reel 18240, frame 925 | Gladwin, S. Christopher; England, Matthew M.; Harsha, Dhavi Gopala Krishna Kapila Lakshmana; Mark, Zachary J.; Thornton, Vance T. | Cleversafe, LLC | Assignment of Assignor's Interest |
| Jul 24, 2007 Reel 19604, frame 646 | Gladwin, S. Christopher; England, Matthew M.; Gopala Krishna Kapila Lakshmana Harsha, Dhanvi; Mark, Zachary J.; Thornton, Vance T. | Cleversafe, Inc. | Change of Name |
| Jan 30, 2008 Reel 20437, frame 344 | Cleversafe, LLC | Cleversafe, Inc. | Assignment of Assignor's Interest |
| 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
Note
The 273 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
1,464
later US patents cite this one
That is top 1% of utility patents granted in 2009 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.