Term ends Mar 5, 2027 · High confidence
20-year base term ends Mar 5, 2027
Held by Unirac, Inc.
Filed Sep 10, 2008 as application 12/207,690 · Granted Aug 24, 2010
Base term, 20 years from filing
Today
2007
2027
Clock starts
Mar 5, 2007
Mar 5, 2007
Term ends
Mar 5, 2027
Mar 5, 2027
Granted
Aug 24, 2010
Aug 24, 2010
base term
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 7,435,134, to Mar 5, 2027. The term already ends on or before that date, so the cap shortened nothing.
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.
7
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 5, 2007, when application 11/681,972, the earliest non-provisional in its chain, was filed (this one was filed Sep 10, 2008) | Mar 5, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,435,134) | resolves to Mar 5, 2027, no earlier than this term, so no change | 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 5, 2027 | High confidence |
This family
| Application 60/821,869 | Provisional application no patent term | no patent term |
| US 7,435,134 | In force Mar 2027 | Mar 2027 |
| Application PCT/US2007/063325 | PCT application no patent term | no patent term |
| Application 11/776,272 | Abandoned not computed | not computed |
| US 8,424,255 | In force Aug 2029 | Aug 2029 |
| Application PCT/US2007/074813 | PCT application no patent term | no patent term |
| US 7,780,472 | this patent Mar 2027 | Mar 2027 |
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 13, 2022 Reel 61422, frame 566 | Sunpower Corporation | Bank of America, N.A., as Agent | Security Interest |
| Feb 14, 2024 Reel 66598, frame 964 | Sunpower Corporation | Glas Americas LLC, as Collateral Agent | Second Lien Patent Security Agreement |
| Apr 1, 2025 Reel 70704, frame 860 | Sunpower Corporation, | Unirac, Inc. | Release of Security Interest |
| May 16, 2025 Reel 71302, frame 904 | Sunpower Corporation; Sunpower Corporation, Systems | Unirac, Inc. | 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.
What's changing
Mar 2027
Term ends Mar 5, 2027. No further fees fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 7,435,134, ends no earlier than this term, so it caps nothing.
Citations
444
later US patents cite this one
That is top 1% of utility patents granted in 2010 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.