14 patents currently held

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

The next term ends in Oct 2028. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Oct 2028

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

202620272028 202920302031203220332034 203520362037 20382039204020412042204320442045

notable patents fee due within 90 days all others Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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

Sofc-Conduction US 10,446,858

Cited by 43 later US patents, top 5% of utility patents granted in 2019 in our data. Protection runs to 2037.

Ends Apr 2037 · High confidence Also notable

Solid Oxide Fuel Cell Systems with Hot Zones Having Improved Reactant Distribution US 8,304,122

The most cited patent in this portfolio, cited by 60 later US patents, top 10% of utility patents granted in 2012 in our data. Protection runs to 2031.

Ends Mar 2031 · High confidence Also notable

Sofc System Formed with Multiple Thermally Conductive Pathways US 10,573,911

Cited by 8 later US patents, top 25% of utility patents granted in 2020 in our data. Protection runs to 2037.

Ends Oct 2037 · 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 30, 2026
The maintenance fee for Planar Solid Oxide Fuel Unit Cell and Stack (US 11,664,517) comes due Nov 30, 2026. Unpaid by Jun 1, 2027, it lapses early.
2 fees due Apr 10 to 15, 2027 · next Apr 10
1 fee due Aug 25, 2027
The maintenance fee for Sofc System Formed with Multiple Thermally Conductive Pathways (US 10,573,911) comes due Aug 25, 2027. Unpaid by Feb 25, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

What they patent

The 5 largest of its 7 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Sofc-Conduction (2014)	4 in force	to Apr 2037
Sofc System Formed with Multiple Thermally Conductive Pathways	3 in force	to Oct 2037
Planar Solid Oxide Fuel Unit Cell and Stack	2 in force	to Jun 2038
Solid Oxide Fuel Cell Systems with Hot Zones Having Improved Reactant Distribution	2 in force	to Mar 2031
Sofc-Conduction (2022)	1 in force	to Dec 2040

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 8,197,976	Solid Oxide Fuel Cell Systems with Hot Zones and Two-Stage Tail Gas Combustors In force Term ends Oct 24, 2028 · High confidence	In force	Term ends Oct 24, 2028	High confidence
US 9,343,758	Solid Oxide Fuel Cell Systems with Hot Zones Having Improved Reactant Distribution In force Term ends Nov 26, 2029 · High confidence	In force	Term ends Nov 26, 2029	High confidence
US 8,304,122	Solid Oxide Fuel Cell Systems with Hot Zones Having Improved Reactant Distribution In force Term ends Mar 27, 2031 · High confidence	In force	Term ends Mar 27, 2031	High confidence
US 10,916,784	Sofc-Conduction In force Term ends Oct 7, 2034 · High confidence	In force	Term ends Oct 7, 2034	High confidence
US 12,512,488	Sofc-Conduction In force Term ends Mar 19, 2035 · Medium confidence	In force	Term ends Mar 19, 2035	Medium confidence
US 10,109,867	Solid Oxide Fuel Cell with Flexible Fuel Rod Support Structure In force Term ends May 10, 2035 · High confidence	In force	Term ends May 10, 2035	High confidence
US 11,784,331	Sofc-Conduction In force Term ends Oct 15, 2035 · Medium confidence	In force	Term ends Oct 15, 2035	Medium confidence
US 11,605,825	Cpox Reactor Control System and Method In force Term ends Feb 18, 2037 · Medium confidence	In force	Term ends Feb 18, 2037	Medium confidence
US 10,790,523	Cpox Reactor Control System and Method In force Term ends Mar 25, 2037 · High confidence	In force	Term ends Mar 25, 2037	High confidence
US 10,446,858	Sofc-Conduction In force Term ends Apr 8, 2037 · High confidence	In force	Term ends Apr 8, 2037	High confidence

10 of 14 patents shown.

Pro members see all 14.

Pro members: see all 14 patents

Also on record, not counted in the 14: 1 patent ended · 1 application pending. 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.

Export every term end as CSV · Pro

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