The BioStack 4 microplate stacker from BioTek Instruments, Winooski, Vt, has been granted a US patent for its technology associated with automatic microplate delidding and relidding, especially useful in cell-based assay workflows. BioStack 4 facilitates increased throughput and greater productivity in processes involving lidded and unlidded 96-, 384-, and 1536-well microplates, as well as select 6- to 48-well microplates. The design incorporates a two-position carrier for fast transfer times, and the small overall footprint allows operation in biosafety cabinets. A rotational gripper enhances versatility in portrait or landscape orientation, while a unique lid-gripping method minimizes exposure of the microplate’s contents during transfer. Interchangeable plate storage stacks are available for throughput needs of up to 30 lidded or 50 unlidded microplates, with automated restacking. For more information, visit BioTek Instruments.