Back in 1999, i designed /invented a product for paint tins.I took the concept to a plastics manufacturer who was bowled over by the idea and it's application, i was offered either a royalty or a business partnership with this company solely for the manufacture and sales of the idea. I accepted the partnership. The concept was then registered for design with the patent office and signed by both parties, unfortunately things went sour this was after production had taken place( long story ). As the certification has now lapsed would the 2nd party have any legal hold on me as i am thinking of giving this idea a second outing. Thanks for looking.