7 energy & batteries patents lapsed this week
Selected from 3,667 patents the USPTO recorded as expired for unpaid fees, ranked by opportunity score. The summaries and most of each score are generated by AI.
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1
Centralized fresh-air cooling using HVAC blower to exhaust through attic
A retrofit system that uses a home’s single forced-air blower to draw cooler outside air through open windows or doors into the furnace/air-handler return and divert the resulting...
72score / 100 -
2
Evacuated reflective chamber with internal hollow disc heat sink
A hollow, evacuated concentrator mounted to a parabolic reflective dish that directs sunlight into an interior chamber toward a disc-shaped hollow heat sink. The heat sink has inlet and...
72score / 100 -
3
Interleaving compressed-rail solar module mount
A rail-based mounting assembly that holds framed solar modules between an upper rail and a lower rail whose flange members interleave and are axially compressed to clamp module ends....
70score / 100 -
4
Solar module with potting-free access area in junction box
A photovoltaic module whose junction/connection box contains a potting compound that partially surrounds a bypass device (for example a bypass diode) but deliberately leaves at least one...
69score / 100 -
5
Synchronous‑rectified buck converter using a coupled inductor
A DC‑to‑DC synchronous‑rectifier (SR) buck converter that uses two magnetically coupled windings on the same core to transfer energy and to generate a drive/control voltage for the...
68score / 100 -
6
Hvac apparatus, method, and system Pro
Write-up, demand check and manufacturing notes available with Pro.
··score / 100 -
7
Passive resonant bidirectional converter with galvanic barrier Pro
Write-up, demand check and manufacturing notes available with Pro.
··score / 100
