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 March 31, 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:

	March 31,			December 31,
	2012			2011
Patents	$	318,280		$	318,280
Accumulated Amortization		(140,808	)		(127,863	)
	$	177,472		$	190,427

The amortization expense for patents was $12,945 for the three months ended March 31, 2012. In the comparable period of 2011, the amortization expense for patents was $10,610. The estimated aggregate amortization expense for each of the next five years is approximately as follows:

2013			46,000
2014			36,000
2015			13,000
2016			9,000
2017 through 2020			9,000