32 patents currently held
1 more in force is now held by another company
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
The next term ends in Jun 2030. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
4
Ending by 2030
Jun 2030
Next term end
20
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
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
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends no later than Aug 2033 · Medium confidence
Also notable
Ends Feb 2035 · High confidence
Also notable
Ends Sep 2032 · High confidence
Method and Apparatus for Delivering Power Using External Data
US 9,406,094
Cited by 78 later US patents, top 5% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2033. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.
Method for Balancing Frequency Instability on an Electric Grid Using Networked Distributed Energy Storage Systems
US 9,634,508
The most cited patent in this portfolio, cited by 117 later US patents, top 5% of utility patents granted in 2017 in our data. Protection runs to 2035.
Multiphase Electrical Power Construction and Assignment at Minimal Loss
US 8,774,977
Cited by 29 later US patents, top 25% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032.
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 2 fees due Feb 1 to 20, 2027 · next Feb 1
- 2 fees due Mar 5 to 15, 2027 · next Mar 5
- 1 fee due Aug 25, 2027The maintenance fee for Increasing the Demand Reduction Effectiveness of an Energy Storage System (US 10,571,947) comes due Aug 25, 2027. Unpaid by Feb 25, 2028, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 5 largest of its 20 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Method and Apparatus for Delivering Power Using External Data | 5 in force | to Apr 2034 |
| Method for Balancing Frequency Instability on an Electric Grid Using Networked Distributed Energy Storage Systems | 4 in force | to May 2036 |
| Multiphase Electrical Power Construction and Assignment at Minimal Loss | 3 in force | to Sep 2032 |
| High Speed Feedback Adjustment of Power Charge/Discharge from an Energy Storage System | 2 in force | to Apr 2032 |
| Bidirectional Energy Converter with Controllable Filter Stage | 2 in force | to Feb 2032 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 9,136,712 | High Speed Feedback Adjustment of Power Charge/Discharge from Energy Storage System In force · High confidence | In force | High confidence | |
| US 8,368,386 | Meter Socket Connection Methods and Systems for Local Generators or Monitoring Connections In force · High confidence | In force | High confidence | |
| US 10,804,710 | Bidirectional Energy Converter with Controllable Filter Stage In force · High confidence | In force | High confidence | |
| US 8,643,336 | High Speed Feedback Adjustment of Power Charge/Discharge from Energy Storage System In force · High confidence | In force | High confidence | |
| US 8,350,521 | High Speed Feedback Adjustment of Power Charge/Discharge from an Energy Storage System In force · High confidence | In force | High confidence | |
| US 8,803,570 | Multiphase Electrical Power Assignment at Minimal Loss In force · High confidence | In force | High confidence | |
| US 9,600,046 | Multiphase Electrical Power Construction and Assignment at Minimal Loss In force · High confidence | In force | High confidence | |
| US 8,971,057 | Bidirectional Energy Converter with Controllable Filter Stage In force · High confidence | In force | High confidence | |
| US 11,081,897 | High Speed Feedback Adjustment of Power Charge/Discharge from an Energy Storage System In force · High confidence | In force | High confidence | |
| US 9,021,756 | Facilities for Hybrid Tissue Banks held by Stem Cell Reserve LP In force · Low confidence | In force | Low confidence |
Also on record, not counted in the 32: 1 patent in force now held by others · 4 patents ended · 3 applications pending · 5 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.