US 12,480,000 B2
Near infrared reflective copper oxide coated particles
Songtao Wu, Ann Arbor, MI (US); Krishna Gunugunuri, Canton, MI (US); and Debasish Banerjee, Ann Arbor, MI (US)
Assigned to Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US)
Filed by Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US)
Filed on Nov. 20, 2023, as Appl. No. 18/514,434.
Application 18/514,434 is a division of application No. 17/168,281, filed on Feb. 5, 2021, granted, now 11,834,579.
Claims priority of provisional application 63/127,439, filed on Dec. 18, 2020.
Prior Publication US 2024/0309217 A1, Sep. 19, 2024
Int. Cl. C09C 3/06 (2006.01); C09C 1/60 (2006.01); C09D 5/03 (2006.01); C09D 5/33 (2006.01)
CPC C09C 3/063 (2013.01) [C09C 1/60 (2013.01); C09D 5/004 (2013.01); C09D 5/035 (2013.01); C01P 2004/84 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for forming a copper coated particles comprising:
combining a precipitating agent with a solution comprising copper nitrate and particles, wherein the particles are cobalt oxide (Co3O4) or carbon black, thereby forming coated particles;
washing the coated particles, thereby obtaining washed coated particles;
filtering the washed coated particles, thereby obtaining filtered coated particles;
drying the filtered coated particles, thereby obtaining dried coated particles; and
calcining the dried coated particles to form the copper coated particles, wherein
the copper coated particles have a reflectivity of electromagnetic radiation in a visible spectrum that is less than or equal to 5%, and
the copper coated particles have a reflectivity of electromagnetic radiation in a near-IR and LiDAR spectrum that is greater than or equal to 5%.