Term ends May 5, 2031 · High confidence
20-year base term ends Dec 20, 2028
Held by Enphase Energy, Inc.
Filed Dec 20, 2008 as application 12/340,715 · Granted Feb 16, 2016
Base term plus 866 days of patent term adjustment (USPTO delay)
Today
2008
2031
Clock starts
Dec 20, 2008
Dec 20, 2008
Term ends
May 5, 2031
May 5, 2031
Granted
Feb 16, 2016
Feb 16, 2016
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
866
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.
This patent's term runs 866 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 Dec 20, 2008, when this application, 12/340,715, was filed | Dec 20, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +866 days, USPTO patent term adjustment record | May 5, 2031 | 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 | May 5, 2031 | High confidence |
This family
| US 9,263,895 | this patent May 2031 | May 2031 |
| Application PCT/US2008/087882 | PCT application no patent term | no patent term |
| US 8,796,884 | In force Nov 2032 | Nov 2032 |
| Application 12/368,987 | Abandoned not computed | not computed |
| Application PCT/US2009/068871 | PCT application no patent term | no patent term |
| Application 14/451,189 | Abandoned not computed | not computed |
| US 9,608,448 | In force Dec 2028 | Dec 2028 |
| US 11,527,964 | In force Oct 2030 | Oct 2030 |
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 |
|---|---|---|---|
| Feb 17, 2009 Reel 22267, frame 661 | Naiknaware, Ravindranath; Le, Triet Tu; Fiez, Terri Shreeve; Mayaram, Kartikeya | Azuray Technologies, Inc. | Assignment of Assignor's Interest |
| Feb 4, 2013 Reel 29871, frame 875 | Azuray Technologies, Inc. | Solarbridge Technologies, Inc. | Assignment of Assignor's Interest |
| Feb 26, 2013 Reel 29881, frame 470 | Azuray Technologies, Inc. | Solarbridge Technologies, Inc. | Assignment of Assignor's Interest |
| Sep 2, 2014 Reel 33677, frame 870 | Solarbridge Technologies, Inc. | Silicon Valley Bank | Security Interest |
| Dec 19, 2014 Reel 34681, frame 475 | Silicon Valley Bank | Solarbridge Technologies, Inc. | Release of Security Interest |
| Dec 19, 2014 Reel 34687, frame 232 | Solarbridge Technologies, Inc. | Sunpower Corporation | Assignment of Assignor's Interest |
| Sep 10, 2018 Reel 46964, frame 203 | Sunpower Corporation | Enphase Energy, 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
May 2031
Term ends May 5, 2031. Maintenance fees still fall due before then
Note
The 866 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
143
later US patents cite this one
That is top 5% of utility patents granted in 2016 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.