34 patents currently held

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

The next term ends in Jul 2030. from the record

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Alerts on its grants, lapses and transfers.

Ending by 2030

Jul 2030

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030 2031 2032 2033 2034 2035 2036 2037 2038 2039 20402041204220432044 2045

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

Battery Energy Storage System and Control System and Applications Thereof US 9,847,654

The most cited patent in this portfolio, cited by 98 later US patents, top 5% of utility patents granted in 2017 in our data. Protection runs to 2031. 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.

Ends no later than Jun 2031 · Medium confidence Also notable

Microgrid Power System US 11,336,111

Cited by 20 later US patents, top 5% of utility patents granted in 2022 in our data. Protection runs to 2039.

Ends Jun 2039 · High confidence Also notable

Island Grid Power Supply Apparatus and Methods Using Energy Storage for Transient Stabilization US 9,312,699

Cited by 53 later US patents, top 10% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2034.

Ends Jul 2034 · High confidence

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.

1 fee due Nov 14, 2026
The maintenance fee for Multi-Generator Applications Using Variable Speed and Solid State Generators for Efficiency and Frequency Stabilization (US 10,289,080) comes due Nov 14, 2026. Unpaid by May 14, 2027, it lapses early.
2 fees due Apr 24 to 27, 2027 · next Apr 24
1 fee due Jun 12, 2027
The maintenance fee for Microgrid Power System (US 11,843,278) comes due Jun 12, 2027. Unpaid by Dec 13, 2027, it lapses early.
1 fee due Jul 14, 2027
The maintenance fee for Battery Energy Storage System and Control System and Applications Thereof (US 10,536,007) comes due Jul 14, 2027. Unpaid by Jan 14, 2028, it lapses early.
2 fees due Aug 2 to 25, 2027 · next Aug 2
2 fees due Oct 7 to 12, 2027 · next Oct 7
1 fee due Nov 3, 2027
The maintenance fee for Electrical Energy Storage Unit and Control System and Applications Thereof (US 9,331,497) comes due Nov 3, 2027. Unpaid by May 3, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

1 of the patents on this record was granted since Aug 16, 2026

What they patent

The 5 largest of its 26 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Microgrid Power System	3 in force	to Jun 2039
Island Grid Power Supply Apparatus and Methods Using Energy Storage for Transient Stabilization	3 in force	to Jul 2035
Electrical Energy Storage Unit and Control System and Applications Thereof	3 in force	to Aug 2031
Enhanced Switched Balancing Network for Battery Pack	2 in force	to Jan 2039
Battery Energy Storage System	2 in force	to Apr 2036

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 8,928,442	Inductive Component Equipped with a Liquid Cooling and a Method for Manufacturing an Inductive Component In force Term ends Jul 2, 2030 · High confidence	In force	Term ends Jul 2, 2030	High confidence
US 8,456,263	Winding Arrangement for an Inductive Component In force Term ends Oct 8, 2030 · High confidence	In force	Term ends Oct 8, 2030	High confidence
US 10,536,007	Battery Energy Storage System and Control System and Applications Thereof In force Term ends Apr 21, 2031 · High confidence	In force	Term ends Apr 21, 2031	High confidence
US 9,847,654	Battery Energy Storage System and Control System and Applications Thereof In force Ends no later than Jun 1, 2031 · Medium confidence	In force	Ends no later than Jun 1, 2031	Medium confidence
US 9,331,497	Electrical Energy Storage Unit and Control System and Applications Thereof In force Term ends Aug 5, 2031 · High confidence	In force	Term ends Aug 5, 2031	High confidence
US 9,251,947	Liquid Cooling Arrangement of an Inductive Component and a Method for Manufacturing an Inductive Component In force Term ends Jan 8, 2032 · High confidence	In force	Term ends Jan 8, 2032	High confidence
US 10,615,597	Grid Power Supply Apparatus and Methods Using Energy Storage for Transient Stabilization In force Term ends Jul 13, 2033 · High confidence	In force	Term ends Jul 13, 2033	High confidence
US 9,168,836	Non-Traction Battery Controller and Applications Thereof In force Term ends Jan 27, 2034 · High confidence	In force	Term ends Jan 27, 2034	High confidence
US 9,312,699	Island Grid Power Supply Apparatus and Methods Using Energy Storage for Transient Stabilization In force Term ends Jul 11, 2034 · High confidence	In force	Term ends Jul 11, 2034	High confidence
US 9,553,517	Hybrid Energy Storage System and Methods In force Term ends Mar 25, 2035 · High confidence	In force	Term ends Mar 25, 2035	High confidence

10 of 34 patents shown.

Pro members see all 34.

Pro members: see all 34 patents

Also on record, not counted in the 34: 1 patent ended · 4 applications pending · 2 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.

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