34 patents currently held

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

The next term ends in Jul 2028. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Jul 2028

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030 203120322033 2034 2035 2036 2037 203820392040 20412042204320442045

notable patents fee due within 90 days all others Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know

Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank

Notable

Double Sided Heat Exchanger Cooling Unit US 10,638,639

Granted 2020. Computed term ends 2036.

Ends Aug 2036 · High confidence Also notable

Phase Change Actuated Valve for Use in Heat Pipe Applications US 10,215,501

Granted 2019 and renewed at 2 of 3 maintenance windows. Protection runs to 2035.

Ends Oct 2035 · High confidence Also notable

Heat Transfer Device Having an Enclosure and a Non-Permeable Barrier Inside the Enclosure US 11,408,683

The newest of the three, granted 2022. It anchors the portfolio to 2040, later than anything else here.

Ends Dec 2040 · High confidence

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.

2 fees due Feb 6 to 20, 2027 · next Feb 6
4 fees due Jun 1 to 15, 2027 · next Jun 1
1 fee due Jul 23, 2027
The maintenance fee for Heat Spreader Having Conduction Enhancement with EMI Shielding (US 11,882,673) comes due Jul 23, 2027. Unpaid by Jan 24, 2028, it lapses early.
1 fee due Aug 11, 2027
The maintenance fee for Incineration System and Process (US 10,557,391) comes due Aug 11, 2027. Unpaid by Feb 11, 2028, it lapses early.
1 fee due Sep 30, 2027
The maintenance fee for Heat Pipe - Thermal Storage Medium Based Cool Storage System (US 10,605,541) comes due Sep 30, 2027. Unpaid by Mar 31, 2028, it lapses early.
1 fee due Oct 28, 2027
The maintenance fee for Double Sided Heat Exchanger Cooling Unit (US 10,638,639) comes due Oct 28, 2027. Unpaid by Apr 28, 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.

What they patent

The 5 largest of its 29 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Heat Transfer Device Having an Enclosure and a Non-Permeable Barrier Inside the Enclosure	2 in force	to Jun 2041
Loop Heat Pipe Evaporator	2 in force	to Oct 2038
Double Sided Heat Exchanger Cooling Unit	2 in force	to Dec 2036
Constant Conductance Heat Pipe Assembly for High Heat Flux	2 in force	to Jun 2036
Phase Change Actuated Valve for Use in Heat Pipe Applications	2 in force	to Oct 2035

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 7,748,436	Evaporator for Capillary Loop In force Term ends Jul 14, 2028 · High confidence	In force	Term ends Jul 14, 2028	High confidence
US 8,002,021	Heat Exchanger with Internal Heat Pipe In force Term ends Jun 24, 2030 · High confidence	In force	Term ends Jun 24, 2030	High confidence
US 8,210,506	Direct Contact Vortex Flow Heat Exchanger In force Term ends Jan 28, 2031 · High confidence	In force	Term ends Jan 28, 2031	High confidence
US 9,599,408	Loop Heat Pipe Evaporator Including a Second Heat Pipe In force Term ends Apr 7, 2033 · High confidence	In force	Term ends Apr 7, 2033	High confidence
US 9,618,275	Hybrid heat pipe In force Term ends May 12, 2033 · High confidence	In force	Term ends May 12, 2033	High confidence
US 9,204,574	Vapor Chamber Structure In force Term ends Dec 28, 2033 · High confidence	In force	Term ends Dec 28, 2033	High confidence
US 9,879,663	Multi-Phase Pump System and Method of Pumping a Two-Phase Fluid Stream In force Term ends Jan 24, 2034 · High confidence	In force	Term ends Jan 24, 2034	High confidence
US 9,466,551	Heat transferring clamp In force Term ends Mar 11, 2034 · High confidence	In force	Term ends Mar 11, 2034	High confidence
US 9,212,327	System and Process for Producing Fuel with a Methane Thermochemical Cycle In force Term ends Jul 29, 2034 · High confidence	In force	Term ends Jul 29, 2034	High confidence
US 9,578,781	Heat Management for Electronic Enclosures In force Term ends Oct 13, 2034 · High confidence	In force	Term ends Oct 13, 2034	High confidence

10 of 34 patents shown.

Pro members see all 34.

Pro members: see all 34 patents

Also on record, not counted in the 34: 2 patents ended · 4 applications abandoned. List them

Sources and methods

Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built

Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.

Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.

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

Export every term end as CSV · Pro

Advanced Cooling Technologies, Inc.