Answered on Feb 13th, 2013 at 11:15 AM
You can try - but it is likely that no attorney will take your case. Unsolicited disclosures are usually either returned unopened or they are thrown away - company policies differ. Most companies have these policies because they have numerous ideas in development which can take many years before a product is launched. You likely approached the company because your idea was something that you believed would fit in their current product line. Unless you already have a patent on your idea before you send it to them - you have very little chance of success against them - especially four years later.