Sunfire GmbH

14 patents currently held · Updated Nov 14, 2026

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

Ending by 2030

Feb 2027

Next term end

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036203720382039204020412042204320442045

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 Feb 18, 2027
The maintenance fee for Interconnector arrangement for a fuel cell stack (US 9,112,191) comes due Feb 18, 2027. Unpaid by Aug 18, 2027, it lapses early.
2 fees due Mar 15 to 24, 2027 · next Mar 15

Which patents, and when each one lapses · Pro

Recent changes

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

Patents held now

Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.

Patent	Title	Status	Expires	Confidence
US 8,012,644	Fuel cell stack In force Term ends Feb 23, 2027 · From the USPTO record	In force	Term ends Feb 23, 2027	From the USPTO record
US 7,960,441	Method for reprocessing combustion products from fossil fuels In force Term ends Oct 25, 2027 · From the USPTO record	In force	Term ends Oct 25, 2027	From the USPTO record
US 9,508,997	Media supply plate for a fuel cell stack In force Term ends Feb 20, 2028 · From the USPTO record	In force	Term ends Feb 20, 2028	From the USPTO record
US 8,383,282	Contact arrangement and method for assembling a fuel cell stack from at least one contact arrangement In force Term ends Apr 30, 2029 · From the USPTO record	In force	Term ends Apr 30, 2029	From the USPTO record
US 8,293,424	Flow field unit for a fuel cell stack In force Term ends Jun 17, 2029 · From the USPTO record	In force	Term ends Jun 17, 2029	From the USPTO record
US 9,136,553	Electrolyte for cost-effective, electrolyte-supported high-temperature fuel cell having high performance and high mechanical strength In force Term ends Oct 1, 2031 · From the USPTO record	In force	Term ends Oct 1, 2031	From the USPTO record
US 9,112,191	Interconnector arrangement for a fuel cell stack In force Term ends Mar 25, 2032 · From the USPTO record	In force	Term ends Mar 25, 2032	From the USPTO record
US 9,893,328	Thermally Insulating Apparatus for Accommodating at Least One Component of an Sofc Fuel Cell System, and Method for Producing an Apparatus of This Kind In force Term ends Dec 4, 2033 · High confidence	In force	Term ends Dec 4, 2033	High confidence
US 10,421,913	Production Process and Production System for Producing Methane / Gaseous And/Or Liquid Hydrocarbons In force Term ends Apr 8, 2035 · High confidence	In force	Term ends Apr 8, 2035	High confidence
US 10,865,486	Electrolysis method and electrolysis system comprising recirculating flushing media In force Term ends Apr 3, 2036 · From the USPTO record	In force	Term ends Apr 3, 2036	From the USPTO record

10 of 14 patents shown.

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Pro members: see all 14 patents

Also on record, not counted in the 14: 3 lapsed for an unpaid fee · 2 ended at full term. List them

Sources and methods

Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

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Published applications

US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.

1 pending · 2 no status recorded

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