Term ends Sep 30, 2029 · High confidence
20-year base term ends Sep 21, 2029
Held by Gridscale Solutions, LLC
Filed Jul 27, 2015 as application 14/810,022 · Granted Aug 1, 2017
Base term plus 9 days of patent term adjustment (USPTO delay)
Today
2009
2029
Clock starts
Sep 21, 2009
Sep 21, 2009
Term ends
Sep 30, 2029
Sep 30, 2029
Granted
Aug 1, 2017
Aug 1, 2017
base term
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
9
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.
4
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 9 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 Sep 21, 2009, when application 12/563,499, the earliest non-provisional in its chain, was filed (this one was filed Jul 27, 2015) | Sep 21, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +9 days, USPTO patent term adjustment record | Sep 30, 2029 | 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 | Sep 30, 2029 | High confidence |
This family
| US 8,279,642 | In force Oct 2030 | Oct 2030 |
| Application PCT/US2010/041149 | PCT application no patent term | no patent term |
| US 9,093,919 | In force Jan 2030 | Jan 2030 |
| US 9,722,504 | this patent Sep 2029 | Sep 2029 |
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 29, 2017 Reel 41782, frame 381 | Chapman, Patrick L.; Kuhn, Brian T.; Balog, Robert S.; Kimball, Jonathan W.; Krein, Philip T.; Gray, Alexander | Solarbridge Technologies, Inc. | Assignment of Assignor's Interest |
| Mar 29, 2017 Reel 41782, frame 433 | 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 |
| Mar 25, 2026 Reel 74174, frame 532 | Enphase Energy, Inc. | Powerbridge Networks, LLC | Assignment of Assignor's Interest |
| Apr 21, 2026 Reel 74426, frame 830 | Powerbridge Networks, LLC | Gridscale Solutions, LLC | 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
Sep 2029
Term ends Sep 30, 2029. Maintenance fees still fall due before then
Note
The 9 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
22
later US patents cite this one
That is top 25% 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.