Term ends Oct 7, 2030 · High confidence
20-year base term ends Dec 20, 2028
Held by Enphase Energy, Inc.
Filed Feb 22, 2017 as application 15/439,493 · Granted Dec 13, 2022
Base term plus 656 days of patent term adjustment (USPTO delay)
Today
2008
2030
Clock starts
Dec 20, 2008
Dec 20, 2008
Term ends
Oct 7, 2030
Oct 7, 2030
Granted
Dec 13, 2022
Dec 13, 2022
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
656
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it 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 656 days past its 20-year base term on prosecution delay. 1 of 1 maintenance fees is 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 application 12/340,715, the earliest non-provisional in its chain, was filed (this one was filed Feb 22, 2017) | Dec 20, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +656 days, USPTO patent term adjustment record | Oct 7, 2030 | 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 | 1 of 1 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 7, 2030 | High confidence |
This family
| US 9,263,895 | In force 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 | this patent 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 |
|---|---|---|---|
| Mar 30, 2017 Reel 41800, frame 381 | Naiknaware, Ravindranath; Le, Triet Tu; Fiez, Terri Shreeve; Mayaram, Kartikeya | Azuray Technologies, Inc. | Assignment of Assignor's Interest |
| Mar 30, 2017 Reel 41800, frame 450 | Azuray Technologies, Inc. | Solarbridge Technologies, Inc. | Assignment of Assignor's Interest |
| Mar 30, 2017 Reel 41800, frame 496 | 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
Oct 2030
Term ends Oct 7, 2030. No further fees fall due before then
Note
The 656 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
3
later US patents cite this one
That is above the median of utility patents granted in 2022 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.