6. PATENT COSTS

We amortize intangible assets with definite lives on a straight-line basis over their estimated useful lives, ranging from 1 to 8 years, and review for impairment on a quarterly basis and when events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable.

As of June 30, 2012, the Company capitalized certain patent costs, paid by Auxilium on behalf of the Company. These costs are reimbursable to Auxilium under the Auxilium Agreement and are creditable against future royalty revenues. Our net patent costs consisted of:

	June 30,			December 31,
	2012			2011
Patents	$	382,076		$	318,280
Accumulated Amortization		(156,883	)		(127,863	)
	$	225,193		$	190,417

The amortization expense for patents for six months ended June 30, 2012 was approximately $29,000. In the comparable period of 2011, the amortization expense for patents was approximately $21,000. The estimated aggregate amortization expense for each of the next five years is approximately as follows:

2013			52,000
2014			42,000
2015			17,000
2016			14,000
2017 through 2020			14,000