U.S. Patent 2,595,905 for a “Radiant Energy Heat Transfer Device” is granted to Maria Telkes.
On 6 May 1952, U.S. Patent No. 2,595,905, titled “Radiant Energy Heat Transfer Device”, was granted to Mária Telkes. This patent forms part of her larger program to harness solar radiation and transfer heat efficiently for practical applications, including space heating and thermal management.
The invention described a device and method to capture radiant energy—primarily sunlight—and convert it into usable heat that could be stored or directed where needed. In the early 1950s, technical standards for solar heating were still being defined; Telkes’s design contributed to engineering knowledge about materials, geometry, and thermodynamic behavior suitable for solar collectors.
This patent is significant historically because it exemplifies Telkes’s approach: combining physical chemistry, biophysics, and engineering to solve real‑world problems such as residential heating and energy scarcity. It added to her growing portfolio of intellectual property, demonstrating that solar energy technologies could meet patentability criteria of novelty and utility. In an era dominated by fossil fuels and when few women held engineering patents, Telkes’s success signaled both the viability of solar heat‑transfer systems and the capacity of women scientists to lead in cutting‑edge technological innovation.