Collateral for a security interest recorded Jun 30, 2025 (U.S. Bank Trust Company, National Association).
Term ends Sep 23, 2032 · High confidence
20-year base term ends Dec 29, 2031
Held by Stem, Inc.
Filed Dec 29, 2011 as application 13/339,848 · Granted Jul 8, 2014
Base term plus 269 days of patent term adjustment (USPTO delay)
Today
2011
2032
Clock starts
Dec 29, 2011
Dec 29, 2011
Term ends
Sep 23, 2032
Sep 23, 2032
Granted
Jul 8, 2014
Jul 8, 2014
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
269
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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 269 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 29, 2011, when this application, 13/339,848, was filed | Dec 29, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +269 days, USPTO patent term adjustment record | Sep 23, 2032 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 23, 2032 | High confidence |
This family
| US 8,774,977 | this patent Sep 2032 | Sep 2032 |
| Application PCT/US2012/071709 | PCT application no patent term | no patent term |
| US 9,600,046 | In force Jan 2032 | Jan 2032 |
| US 10,901,489 | In force Sep 2032 | Sep 2032 |
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 12, 2012 Reel 27841, frame 84 | Smith, Lynn | Powergetics, Inc. | Assignment of Assignor's Interest |
| Feb 20, 2013 Reel 29844, frame 67 | Reineccius, Stacey | Powergetics, Inc. | Assignment of Assignor's Interest |
| Feb 22, 2013 Reel 29856, frame 505 | Powergetics, Inc. | Stem, Inc. | Change of Name |
| 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
Sep 2032
Term ends Sep 23, 2032. No further fees fall due before then
Note
The 269 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
29
later US patents cite this one
That is top 25% of utility patents granted in 2014 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.