Flowserve Project Manager interview questions

One initial phone screening with HR, phone interview with Hiring Manager, and followed by face to face interview. Interview process was good and was asked to provide examples on almost every question. I however was not clear on the job responsibilities as they were so vague on specifying which products were under this Product Manager position. I had 3 interviews with them and I followed up with the HR when they asked me to for the final candidate selection. No response. As a courtesy since I was selected for all phases of interview process, they could let me know. Disappointing when companies don't appreciate the candidates.