Collateral for a security interest recorded Jun 30, 2025 (U.S. Bank Trust Company, National Association).
Term ends Feb 7, 2035 · High confidence
20-year base term ends Sep 13, 2033
Held by Stem, Inc.
Filed Apr 25, 2017 as application 15/497,046 · Granted Dec 14, 2021
Base term plus 512 days of patent term adjustment (USPTO delay)
Today
2013
2035
Clock starts
Sep 13, 2013
Sep 13, 2013
Term ends
Feb 7, 2035
Feb 7, 2035
Granted
Dec 14, 2021
Dec 14, 2021
base term
patent term adjustment
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
512
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 10,389,126, US 9,634,508, to Feb 7, 2035. The term already ends on or before that date, so the cap shortened nothing.
1 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 512 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. 1 of 3 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 Sep 13, 2013, when application 14/026,993, the earliest non-provisional in its chain, was filed (this one was filed Apr 25, 2017) | Sep 13, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +512 days, USPTO patent term adjustment record | Feb 7, 2035 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,389,126, US 9,634,508) | resolves to Feb 7, 2035, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 7, 2035 | High confidence |
This family
| US 9,634,508 | In force Feb 2035 | Feb 2035 |
| US 10,389,126 | In force May 2036 | May 2036 |
| US 10,756,543 | In force Jan 2035 | Jan 2035 |
| US 11,201,491 | this patent Feb 2035 | Feb 2035 |
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 |
|---|---|---|---|
| Apr 25, 2017 Reel 42142, frame 886 | Kearns, Ben; Detmers, James W.; Burlinson, Jon; Stevens, Drew | Stem, Inc. | Assignment of Assignor's Interest |
| May 11, 2017 Reel 42445, frame 927 | Kearns, Ben; Detmers, James W.; Burlinson, Jon; Stevens, Drew | Stem, Inc. | Corrective Assignment to Correct the Receiving Party Data Previously Recorded at Reel: 042142 Frame: 0886. Assignor(S) Hereby Confirms the Assignment. |
| Jan 27, 2020 Reel 51629, frame 400 | Stem, Inc. | Generate Lending, LLC | Security Interest |
| May 15, 2020 Reel 52677, frame 27 | Stem, Inc. | Ares Climate Infrastructure Partners, L.P., as Administrative Agent | Security Interest |
| Apr 28, 2021 Reel 56079, frame 736 | Ares Climate Infrastructure Partners, L.P. | Stem, Inc. | Release of Patent Security Agreement Recorded at Reel 052677/FRAME 0027 |
| May 3, 2021 Reel 56121, frame 527 | Generate Lending, LLC | Stem, Inc. | Release of Intellectual Property Security Interest Recorded at Reel 051629/FRAME 0400 |
| Jun 30, 2025 Reel 71569, frame 935 | Stem, Inc. | U.S. Bank Trust Company, National Association | Security 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
Feb 2035
Term ends Feb 7, 2035. Maintenance fees still fall due before then
Note
The 512 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 10,389,126, US 9,634,508, ends no earlier than this term, so it caps nothing.
Citations
5
later US patents cite this one
That is above the median of utility patents granted in 2021 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.