Cevizdere LLC

11 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

Jan 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 Aug 13, 2027
The maintenance fee for Fuel Cell Flow Field Design For Thermal Management (US 11,901,591) comes due Aug 13, 2027. Unpaid by Feb 14, 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.

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 7,838,169	Fuel Cell Cathode Flow Field In force Term ends Jan 9, 2027 · High confidence	In force	Term ends Jan 9, 2027	High confidence
US 10,686,199	Fuel Cell Flow Channels and Flow Fields In force Term ends Aug 14, 2033 · High confidence	In force	Term ends Aug 14, 2033	High confidence
US 11,489,175	Fuel Cell Flow Channels and Flow Fields In force Term ends Sep 7, 2033 · High confidence	In force	Term ends Sep 7, 2033	High confidence
US 9,644,277	Reactant Flow Channels for Electrolyzer Applications In force Term ends Oct 30, 2033 · High confidence	In force	Term ends Oct 30, 2033	High confidence
US 11,060,195	Reactant Flow Channels for Electrolyzer Applications In force Term ends Dec 25, 2033 · High confidence	In force	Term ends Dec 25, 2033	High confidence
US 10,734,661	Fuel Cell Components, Stacks and Modular Fuel Cell Systems In force Term ends Feb 25, 2034 · High confidence	In force	Term ends Feb 25, 2034	High confidence
US 10,062,913	Fuel Cell Components, Stacks and Modular Fuel Cell Systems In force Term ends Mar 21, 2035 · High confidence	In force	Term ends Mar 21, 2035	High confidence
US 12,227,855	Reactant Flow Channels For Electrolyzer Applications In force Term ends Jul 19, 2035 · High confidence	In force	Term ends Jul 19, 2035	High confidence
US 10,930,942	Fuel Cell Flow Field Design For Thermal Management In force Term ends Mar 21, 2037 · High confidence	In force	Term ends Mar 21, 2037	High confidence
US 11,901,591	Fuel Cell Flow Field Design For Thermal Management In force Term ends Oct 10, 2037 · High confidence	In force	Term ends Oct 10, 2037	High confidence

10 of 11 patents shown.

Pro members see all 11.

Pro members: see all 11 patents

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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