A Houston-based materials technology company has secured a U.S. patent for a process that converts discarded polyurethane ...

Add Yahoo as a preferred source to see more of our stories on Google. 3Z Brands/CNET Not all memory foam mattresses are created equally. Some are softer, while others are dense and supportive.

Once discarded, spongy polyurethane foam typically just ends up in landfills, where it takes up a lot of space. Thanks to a newly-developed process, however, it could soon be recycled into ...