Term ends Feb 5, 2033 · High confidence
20-year base term ends Jun 2, 2029
Held by Silevo, LLC.
Filed Jun 2, 2009 as application 12/476,991 · Granted Jan 3, 2017
Base term plus 1344 days of patent term adjustment (USPTO delay)
Today
2009
2033
Clock starts
Jun 2, 2009
Jun 2, 2009
Term ends
Feb 5, 2033
Feb 5, 2033
Granted
Jan 3, 2017
Jan 3, 2017
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
1,344
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.
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 1344 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Jun 2, 2009, when this application, 12/476,991, was filed | Jun 2, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1344 days, USPTO patent term adjustment record | Feb 5, 2033 | 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 | In force | High confidence |
| Computed term end | The steps above, in order | Feb 5, 2033 | High confidence |
This family
| US 9,537,032 | this patent Feb 2033 | Feb 2033 |
| Application 12/566,459 | Abandoned not computed | not computed |
| Application 15/366,983 | 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 |
|---|---|---|---|
| Jul 10, 2009 Reel 22942, frame 291 | Heng, Jiunn Benjamin; Yu, Chentao; Xu, Zheng; Fu, Jianming; Ding, Peijun | Sierra Solar Power, Inc. | Assignment of Assignor's Interest |
| Sep 26, 2011 Reel 26978, frame 1 | Sierra Solar Power, Inc. | Silevo, Inc. | Change of Name |
| 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
Feb 2033
Term ends Feb 5, 2033. Maintenance fees still fall due before then
Note
The 1344 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
36
later US patents cite this one
That is top 10% of utility patents granted in 2017 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.