Sheetak, Inc.

16 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

Sep 2030

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 1, 2027
The maintenance fee for Eco-friendly temperature system (US 11,713,908) comes due Feb 1, 2027. Unpaid by Aug 2, 2027, it lapses early.
1 fee due Jun 26, 2027
The maintenance fee for Integrated Thermoelectric Devices on Insulating Media (US 11,856,857) comes due Jun 26, 2027. Unpaid by Dec 27, 2027, it lapses early.
2 fees due Aug 6 to 13, 2027 · next Aug 6

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 9,435,571	Method and apparatus for switched thermoelectric cooling of fluids In force Term ends Sep 16, 2030 · From the USPTO record	In force	Term ends Sep 16, 2030	From the USPTO record
US 8,904,808	Heat pipes and thermoelectric cooling devices In force Term ends Nov 28, 2030 · From the USPTO record	In force	Term ends Nov 28, 2030	From the USPTO record
US 9,373,771	Enhanced metal-core thermoelectric cooling and power generation device In force Term ends Jun 30, 2032 · From the USPTO record	In force	Term ends Jun 30, 2032	From the USPTO record
US 10,032,975	Thermoelectric devices and power systems In force Term ends Jun 29, 2036 · From the USPTO record	In force	Term ends Jun 29, 2036	From the USPTO record
US 11,462,669	Thermoelectric device structures In force Term ends Mar 19, 2038 · From the USPTO record	In force	Term ends Mar 19, 2038	From the USPTO record
US 11,903,317	Thermoelectric device structures In force Ends no later than Mar 19, 2038 · From the USPTO record	In force	Ends no later than Mar 19, 2038	From the USPTO record
US 12,516,854	Portable Regulated Temperature Container with Phase Change Materials In force Ends no later than Jan 18, 2039 · Low confidence	In force	Ends no later than Jan 18, 2039	Low confidence
US 11,982,473	Portable temperature regulated container In force Term ends Jan 25, 2039 · From the USPTO record	In force	Term ends Jan 25, 2039	From the USPTO record
US 11,713,908	Eco-friendly temperature system In force Term ends Sep 12, 2039 · From the USPTO record	In force	Term ends Sep 12, 2039	From the USPTO record
US 12,342,721	Double-Sided Thermoelectric Devices with Insulators In force Term ends Oct 19, 2040 · High confidence	In force	Term ends Oct 19, 2040	High confidence

10 of 16 patents shown.

Pro members see all 16.

Pro members: see all 16 patents

Also on record, not counted in the 16: 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 abandoned · 11 no status recorded

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