ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,472,704, issued on Nov. 18.
"Hot-pressing molding method for fiber thermosetting prepreg material" was invented by Chang-Hung Tsai (Kaohsiung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hot-pressing molding method for fiber thermosetting prepreg material includes providing a die module including a first side die and a second side die; providing an upper die; attaching fiber prepreg material to the upper die with the fiber prepreg material facing the die module; closing the upper die and the die module; heating and pressurizing the upper die and the die module; introducing and pouring a gas with a predetermined pressure through a preset pass...