Numerous methods are known for generating micron-scale closed-cell and open-cell porosity in organic coatings and thin films. One formulation technique, known as the solvent precipitation method, is effective at producing a wide range of structures of commercial interest, Useful physical properties include enhanced light reflectance, open-cell porosity, microencapsulation, reduced density; and thermal insulation. These desirable properties have been applied commercially to prepare artificial leather, battery separators, paper coatings, light reflectance standards, insulative coatings, coatings and inks with improved hiding, controlled-release films, low-density flexible circuit boards, and membranes. This paper will review formulation strategies and commercial applications for microporous films via the solvent precipitation method with emphasis on the U.S. patent literature since 1970.