Note 5 - Identifiable Intangible Assets

12 Months Ended

Dec. 31, 2011

Notes To Financial Statements

Intangible Assets Disclosure [Text Block]

Note 5.    Identifiable Intangible Assets

Identifiable intangible assets, subject to amortization, were as follows:

		December 31, 2011							December 31, 2010
	Weighted average amortization period (in years)	Gross carrying amount		Accumulated amortization			Intangible assets, net		Gross carrying amount		Accumulated amortization			Intangible assets, net
Antimicrobial technology	17	$	222,187	$	(222,187	)	$	—	$	222,187	$	(222,187	)	$	—
Licensing agreements	17		61,391		(35,950	)		25,441		61,391		(32,355	)		29,036
Patents pending and approved	13		834,301		(713,445	)		120,856		834,301		(649,269	)		185,032
Total		$	1,117,879	$	(971,582	)	$	146,297	$	1,117,879	$	(903,811	)	$	214,068

Amortization expense related to identifiable intangible assets was $67,771, $67,770 and $71,765 for the years ended December 31, 2011, 2010 and 2009, respectively. Scheduled amortization charges from identifiable intangible assets as of December 31, 2011 were as follows:

Year	Licensing agreements		Patents pending and approved		Total
2012	$	3,595	$	64,175	$	67,770
2013		3,595		37,814		41,409
2014		3,595		5,054		8,649
2015		3,595		5,054		8,649
2016		3,595		5,054		8,649
Thereafter		7,466		3,705		11,171