Company patents
Hill Phoenix, Inc.
Hill Phoenix, Inc. surprisingly shows a significant decline in its core patenting areas, with Refrigeration patents dropping by 43.5% in 2025 and Refrigerators & Cold Storage patents falling by 50.0% in the same year, indicating a shifting priority away from these dominant categories, which together represent over 96% of its portfolio. The company's patenting activity has also largely ceased in several minor categories, with zero patents so far in 2026 across all categories except Refrigeration and Refrigerators & Cold Storage.
Patent Trend by Technology Area
Yearly patent publications since 2023
Product themes
Product-level themes inferred from filings since 2023, with category chips showing where each theme appears. Select a theme to filter the patents below.
86 US filings (since 2023) · 9 categories · 12 themes
Design and control strategies for improving the efficiency, stability, and operational flexibility of refrigerant circuits, including component integration, flow management, phase separation, and pressure regulation.
Non-traditional refrigeration and heat pump systems that utilize principles other than vapor compression, such as magnetocaloric effects, thermoelectric effects, absorption cycles, or thermochemical reactions.
Techniques and mechanisms to optimize the performance, energy consumption, and operational range of compressors in refrigeration and heat pump systems, often involving variable control of compression parameters like volume ratio or speed.
Design of refrigerator interiors with reconfigurable, detachable, or specialized compartments, bins, and accessories to optimize storage, organization, and accessibility of items.
Innovations in the mechanical design, aesthetic features, and integrated functionalities of refrigerator doors, including hinges, handles, internal wiring, and lighting.
Novel designs and configurations for heat exchangers that improve heat transfer efficiency, compactness, or enable specific phase change or separation processes within refrigeration and heat pump cycles.
Systems for precisely directing and controlling chilled air within a refrigerator, often creating distinct temperature zones or optimizing cooling efficiency for different compartments.
Integrated systems within refrigerators for dispensing chilled water, ice, or preparing beverages, often including filtration, storage components, and user interface controls.
Integration of sensors, cameras, and processing units to monitor internal conditions, manage food inventory, or automate food preparation and preservation tasks within a refrigerator.
Use of specialized materials and structures, such as vacuum insulation panels or phase change materials, to improve thermal efficiency and maintain stable temperatures within refrigeration appliances.
Design and integration of thermoelectric modules for converting heat into electricity (power generation) or using electricity for cooling/heating, often involving p-type/n-type semiconductor pellets and waste heat recovery.
Self-contained or portable units designed for maintaining specific temperatures for food, beverages, or sensitive items during transport, often incorporating active cooling or smart monitoring features.
Patents
Showing 1-10 of 33
Compressor Efficiency Control