Platinum Research Organization, Inc.(fka PLROQ)

[ionna]

"I could not find the exact patent"

It is right here, on this page, just scroll down.
http://www.freepatentsonline.com/20050026791.html

You might also want to do more elaborate search on www.freepatentsonline.com
For example, search for "lubricating oil low phosphorous" returned 38160 (sic) matches.

"This patent covers an oil with lower phosphorus content but it still has it -- ZDDP that is"

It is not ZDDP itself that is bad but phosphorous content in it, read from PLRO web site: "high phosphorous content in ZDDP is a major contributor to ... emissions"

"PLRO is not a one trick pony with just the engine oil market"

I do not want to repeat what was already said many times on this board but the truth is that PLRO does not have any commercial products or sales so any 'valuation' today is pure gambling.