Kanthal AB

21 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

Jul 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 Jan 4, 2027
The maintenance fee for Electric fluid flow heater with heating element support member (US 11,692,738) comes due Jan 4, 2027. Unpaid by Jul 6, 2027, it lapses early.
1 fee due Feb 15, 2027
The maintenance fee for A method for straightening of a FeCrAl alloy tube (US 11,724,299) comes due Feb 15, 2027. Unpaid by Aug 16, 2027, it lapses early.
2 fees due Jul 9 to 28, 2027 · next Jul 9
1 fee due Sep 19, 2027
The maintenance fee for Process for manufacturing a chromium alloyed molybdenum silicide portion of a heating element (US 11,932,579) comes due Sep 19, 2027. Unpaid by Mar 20, 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

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 8,085,829	Furnace Insulation In force Term ends Jul 9, 2027 · High confidence	In force	Term ends Jul 9, 2027	High confidence
US 8,597,438	The Use and Method of Producing a Dispersion Strengthened Steel as Material in a Roller for a Roller Hearth Furnace In force Term ends Jul 18, 2028 · High confidence	In force	Term ends Jul 18, 2028	High confidence
US 9,867,232	Heating element and process heater In force Term ends Feb 10, 2035 · From the USPTO record	In force	Term ends Feb 10, 2035	From the USPTO record
US 10,815,554	Ferritic Alloy In force Term ends Apr 18, 2036 · High confidence	In force	Term ends Apr 18, 2036	High confidence
US 11,602,780	Tube and a Method of Manufacturing a Tube In force Term ends Nov 14, 2036 · Medium confidence	In force	Term ends Nov 14, 2036	Medium confidence
US 12,053,811	Tube and a method of manufacturing a tube In force Term ends Nov 14, 2036 · From the USPTO record	In force	Term ends Nov 14, 2036	From the USPTO record
US 10,544,062	A New Molybdenum Silicide Based Composition In force Term ends Dec 19, 2036 · High confidence	In force	Term ends Dec 19, 2036	High confidence
US 11,446,722	A Tube and a Method of Manufacturing a Tube In force Term ends Aug 12, 2037 · High confidence	In force	Term ends Aug 12, 2037	High confidence
US 10,995,036	A Heating Element In force Term ends Mar 15, 2039 · High confidence	In force	Term ends Mar 15, 2039	High confidence
US 11,724,299	A method for straightening of a FeCrAl alloy tube In force Term ends Sep 5, 2039 · High confidence	In force	Term ends Sep 5, 2039	High confidence

10 of 21 patents shown.

Pro members see all 21.

Pro members: see all 21 patents

Also on record, not counted in the 21: 5 lapsed for an unpaid fee · 44 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 abandoned · 4 no status recorded

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