Example: ul > li will match all <li> elements that are inside a <ul> element. Descendant selectors. The ' ' combinator selects nodes that are children (not necessary direct children) of the former specified element. Example: div span will match any <span> element that is inside a <div> element.
Generic Firazyr. Because a patent is in place until  July 2014, companies are currently not allowed to make a generic version of Firazyr (icatibant). However, after this patent expires, a generic product may become available.
If confidentiality can be maintained, the idea is likely a valid trade secret. Advantage #2: Trade secret protection can last indefinitely. While patents generally last up to 20 years, and copyrights generally last up to 100 years, a trade secret can potentially last forever. As long as the trade secret remains secret, the protection will not expire.