Collateral for a security interest recorded Sep 12, 2025 (Barclays Bank PLC).
Term ends Mar 13, 2027 · High confidence
20-year base term ended Mar 6, 2026
Held by Altera Corporation
Filed Mar 6, 2006 as application 11/368,559 · Granted Apr 21, 2009
Base term plus 372 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Mar 6, 2006
Mar 6, 2006
Term ends
Mar 13, 2027
Mar 13, 2027
Granted
Apr 21, 2009
Apr 21, 2009
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
372
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.
4
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 372 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 6, 2006, when this application, 11/368,559, was filed | Mar 6, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +372 days, USPTO patent term adjustment record | Mar 13, 2027 | 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 | Mar 13, 2027 | High confidence |
This family
| US 7,521,907 | this patent Mar 2027 | Mar 2027 |
| US 8,013,580 | Term ended Mar 2026 | Mar 2026 |
| US 8,736,241 | Term ended Mar 2026 | Mar 2026 |
| US 9,748,840 | Lapsed on the fee record Aug 2025 | Aug 2025 |
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 |
|---|---|---|---|
| Aug 3, 2007 Reel 19646, frame 606 | Alou Cervera, Pedro; Cobos Marquez, Jose Antonio; Lotfi, Ashraf W.; Soto Del Pecho, Andres | Enpirion, Inc. | Assignment of Assignor's Interest |
| May 27, 2008 Reel 21029, frame 674 | Enpirion, Inc. | Hercules Technology Ii, L.p. | Security Agreement |
| Feb 20, 2009 Reel 22277, frame 935 | Hercules Technology Ii, L.p. | Enpirion, Inc. | Release of Security Interest |
| Jun 20, 2022 Reel 60390, frame 187 | Enpirion, Inc. | Altera Corporation | Assignment of Assignor's Interest |
| Aug 11, 2022 Reel 61159, frame 694 | Altera Corporation | Intel Corporation | Assignment of Assignor's Interest |
| Jan 19, 2024 Reel 66353, frame 886 | Intel Corporation | Altera Corporation | Assignment of Assignor's Interest |
| Sep 12, 2025 Reel 73431, frame 309 | Altera Corporation | Barclays Bank PLC, as Collateral Agent | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Mar 2027
Term ends Mar 13, 2027. No further fees fall due before then
Note
The 372 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
100
later US patents cite this one
That is top 10% 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.