Tretinoin was co-developed for its use in acne by James Fulton and Albert Kligman when they were at University of Pennsylvania in the late 1960s. The University of Pennsylvania held the patent for Retin-A, which it licensed to pharmaceutical companies.
/ËÊnËkÉËnstÉËtuËÊÉnlÌ/ /ËÊnËkÉnstÉËtjuËÊÉnlÌ/. adjective. Learner's definition of UNCONSTITUTIONAL. : not allowed by the constitution of a country or government: not constitutional.ËÊnËkÉËnstÉËtuËÊÉnlÌ/ /ËÊnËkÉnstÉËtjuËÊÉnlÌ/. adjective. Learner's definition of UNCONSTITUTIONAL. : not allowed by the constitution of a country or government: not constitutional.
The <b>Judicial Branch</b> can declare a Presidential Order (called an Executive Order) unconstitutional. While the US Supreme Court is the final arbiter of constitutionality, even US District Courts can overturn an Executive Order, as was the case with President Obama's moratorium on deep water drilling in the Gulf.