Thermax Limited

9 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

Aug 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 Jul 19, 2027
The maintenance fee for Hybrid absorption-compression chiller (US 9,239,177) comes due Jul 19, 2027. Unpaid by Jan 19, 2028, it lapses early.
1 fee due Aug 25, 2027
The maintenance fee for Regeneration system for a metal hydride heat pump (US 10,571,160) comes due Aug 25, 2027. Unpaid by Feb 25, 2028, it lapses early.
1 fee due Sep 30, 2027
The maintenance fee for Air changeover system for metal hydride heat pump (US 10,605,496) comes due Sep 30, 2027. Unpaid by Mar 31, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

1 term has ended 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.

Showing 1 to 9 of 9

Patent	Title	Status	Expires	Confidence
US 8,069,678	Heat Transfer in the Liquefied Gas Regasification Process In force Term ends Aug 8, 2030 · High confidence	In force	Term ends Aug 8, 2030	High confidence
US 9,239,177	Hybrid absorption-compression chiller In force Term ends Jun 7, 2032 · From the USPTO record	In force	Term ends Jun 7, 2032	From the USPTO record
US 8,776,535	Ambient air vaporizer fog dispersal system In force Term ends Jul 5, 2032 · High confidence	In force	Term ends Jul 5, 2032	High confidence
US 8,662,149	Frost free cryogenic ambient air vaporizer In force Term ends Nov 28, 2032 · High confidence	In force	Term ends Nov 28, 2032	High confidence
US 8,839,635	High Efficiency Double-Effect Chiller Heater Apparatus In force Term ends Jul 25, 2033 · High confidence	In force	Term ends Jul 25, 2033	High confidence
US 8,978,397	Absorption Heat Pump Employing a High/Low Pressure Evaporator/Absorber Unit a Heat Recovery Unit In force Term ends Jan 16, 2034 · High confidence	In force	Term ends Jan 16, 2034	High confidence
US 10,829,369	System for improved hydrogen distribution in a metal hydride reactor In force Term ends Feb 17, 2036 · From the USPTO record	In force	Term ends Feb 17, 2036	From the USPTO record
US 10,605,496	Air changeover system for metal hydride heat pump In force Term ends Apr 16, 2036 · From the USPTO record	In force	Term ends Apr 16, 2036	From the USPTO record
US 10,571,160	Regeneration system for a metal hydride heat pump In force Term ends Jul 5, 2036 · From the USPTO record	In force	Term ends Jul 5, 2036	From the USPTO record

Also on record, not counted in the 9: 6 lapsed for an unpaid fee · 7 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 · 3 no status recorded

List them