Term ends Apr 17, 2029 · High confidence
20-year base term ends Mar 10, 2029
Held by Silevo, LLC.
Filed Sep 25, 2012 as application 13/626,740 · Granted Oct 28, 2014
Base term plus 38 days of patent term adjustment (USPTO delay)
Today
2009
2029
Clock starts
Mar 10, 2009
Mar 10, 2009
Term ends
Apr 17, 2029
Apr 17, 2029
Granted
Oct 28, 2014
Oct 28, 2014
base term
patent term adjustment
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
38
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,283,557, to Apr 17, 2029. 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.
3
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 38 days past its 20-year base term on 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 10, 2009, when application 12/401,314, the earliest non-provisional in its chain, was filed (this one was filed Sep 25, 2012) | Mar 10, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +38 days, USPTO patent term adjustment record | Apr 17, 2029 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,283,557) | resolves to Apr 17, 2029, 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 | Apr 17, 2029 | High confidence |
This family
| US 8,283,557 | In force Dec 2030 | Dec 2030 |
| US 8,872,020 | this patent Apr 2029 | Apr 2029 |
| Application 14/525,140 | Abandoned not computed | not computed |
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 26, 2013 Reel 31291, frame 889 | Yu, Chentao; Heng, Jiunn Benjamin; Xu, Zheng; Fu, Jianming | Silevo, Inc. | Assignment of Assignor's Interest |
| May 4, 2015 Reel 35559, frame 179 | Silevo LLC | Solarcity Corporation | Assignment of Assignor's Interest |
| May 17, 2016 Reel 38620, frame 23 | Silevo, Inc.; Sunflower Acquisition LLC | Silevo, LLC. | Merger and Change of Name |
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
Apr 2029
Term ends Apr 17, 2029. No further fees fall due before then
Note
The 38 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,283,557, ends no earlier than this term, so it caps nothing.
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2014 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.