All that other stuff ...We're not sure what's going on with your company but assuming the assets are transferred to another entity, that new entity will step into the shoes of your employer and own everything you created. Practically, the new owners may not police the old agreements, or may not be aware of what you're doing, but under contract law, they could claim rights to it. The Dear RIch Staff reports that your predicament is standard, (and often a business necessity) for many innovative companies. And in these days of disappearing job opportunities, it's not likely to go away.
Even without the paperwork ... Regardless of whether you signed any paperwork, if you were employed for your innovation skills (or hired to create inventions), the employer would likely own what you create under the "employed to invent" doctrine. Alternatively, even if you weren't hired to invent, if you use the employer's resource (materials, supplies or time), the employer may obtain a royalty-free right to own your innovations under "shop-right" rules. In addition, whether or not you signed a nondisclosure agreement, you're bound under state laws to maintain an employer's trade secrets. (Sometimes, the rules expressed above are different for government and university employees.
Plunk Your Magic Twanger! What about this picture of a rare poisonous tree frog? Okay, it's not actually poisonous or a tree frog. In fact the only reason we're posting it is that istockphoto.com was offering it as a free download and we like the way the little guy looked.