Complex sentence: At the time, "soft moist" food products were relatively new, and the technology used to produce Gaines-Burgers was refined for human food products during the 1960s and 1970s.
Split into simpler sentences: At the time, "soft moist" food products were relatively new. The technology used to produce Gaines-Burgers was adapted and refined for human food products during the 1960s and 1970s.