Intangible assets

6 Months Ended

Jun. 30, 2014

Intangible assets [Abstract]

Intangible assets

4. Intangible assets

At June 30, 2014 and December 31, 2013, intangible assets and intangible assets net of amortization were comprised of the following:

	June 30, 2014 (Unaudited)			December 31, 2013
Intangible assets	$	54,719,918		$	54,719,918
Accumulated amortization		(11,247,829	)		(8,511,833	)
Intangible assets, net	$	43,472,089		$	46,208,085

BioTime amortizes its intangible assets generally over an estimated period of 10 years on a straight line basis. BioTime recognized $2,735,996 and $1,285,145 in amortization expense of intangible assets during the six months ended June 30, 2014 and 2013, respectively.