Due dilligence on a company, best way to check if its hot or not?!?

i've had a tip off about a company that is to release some products to market, then float on the stock exchange. i have access to preferential shares through an employee of the company (a vague business acquaintance). apparently these products could/should really take off and make the shares jump up dramatically in value, but i dint know whether i'm being scammed. what is the best course of action to check out the company? i've checked as many websites as i can, re patents and trademarks applied for, and while i can see trademarks have been granted back in march this year, i find very little info on whether a patent for the products in question have even been filed. possible 400% return on investment within 2 months.