Found most of this at Wikipedia...Hilarious stuff. Lava Lamp also known as Astro Lamp. Was invented in 1963 by Edward Craven-Walker. He called it the "Display Device". Reminds of CRT, LCD, TV, HD... The patent link is:
http://www.google.com/patents?vid=3387396 Check out Claim #2 (Definitely user friendly language) "The decorative system of claim 1 wherein the decorative aqueous mixture in one said windowpane structure is an essentially different color than the decorative aqueous mixture in another of said windowpane structures." For those of you that like to DIY (do the words DIY acoustic treatment with fiberglass come to mind...yes, yes they do...:)) I found a site for DIY Lava Lamps:
http://www.oozinggoo.com/howto.html , however, it looks like this is similar to frying a Turky. If you don't know what your doing then don't do it, otherwise you might just qualify for the coveted Darwin Award. Peace!