Lapsed Apr 2, 2025 on the fee record · High confidence
20-year base term ends Apr 16, 2028
Third maintenance fee unpaid; grace period ended.
Held by Altera Corporation
Filed Nov 4, 2010 as application 12/939,547 · Granted Apr 2, 2013
Base term, 20 years from filing, plus 261 days of patent term adjustment (USPTO delay)
Today
Lapsed Apr 2, 2025
2008
2029
Clock starts
Apr 16, 2008
Apr 16, 2008
No longer in force
Apr 2, 2025
Apr 2, 2025
Granted
Apr 2, 2013
Apr 2, 2013
Term would have run to
Jan 2, 2029
Jan 2, 2029
base term
patent term adjustment
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
261
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
8
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 Jan 2, 2029: its 20-year base term plus 261 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 Apr 16, 2008, when application 12/103,993, the earliest non-provisional in its chain, was filed (this one was filed Nov 4, 2010) | Apr 16, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +261 days, USPTO patent term adjustment record | Jan 2, 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 | 2 of 3 maintenance fees paid | lapsed Apr 2, 2025 | High confidence |
| Computed term end | The steps above, in order | Apr 2, 2025 | High confidence |
This family
| US 7,679,342 | Lapsed on the fee record Mar 2018 | Mar 2018 |
| US 8,154,261 | In force Apr 2028 | Apr 2028 |
| US 8,283,901 | In force Apr 2028 | Apr 2028 |
| US 9,246,390 | Lapsed on the fee record Jan 2024 | Jan 2024 |
| US 8,410,769 | this patent Apr 2025 | Apr 2025 |
| US 8,541,991 | In force Jun 2028 | Jun 2028 |
| US 8,692,532 | In force Apr 2029 | Apr 2029 |
| US 8,686,698 | In force Jun 2029 | Jun 2029 |
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 |
|---|---|---|---|
| Jan 25, 2011 Reel 25689, frame 438 | Lopata, Douglas Dean; Lotfi, Ashraf W. | Enpirion, Inc. | Assignment of Assignor's 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 |
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 261 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
50
later US patents cite this one
That is top 25% of utility patents granted in 2013 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.