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Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2016
Intangible Assets [Abstract]  
Summary of Intangible Assets
Intangible assets at December 31, 2016 and 2015 consisted of the following:
 
 
 
2016
 
2015
 
 
 
 
 
 
 
Patent costs
 
$
1,154,523
 
$
1,154,523
 
Less — Accumulated amortization
 
 
(1,129,094)
 
 
(1,029,497)
 
Less — Write off related to patents no longer in use
 
 
 
 
(66,147)
 
Total
 
$
25,429
 
$
58,879
 
Patent Costs Amortized on a Straight-Line Basis
Patent costs which are being amortized on a straight-line basis over a 10-year life, are scheduled to amortize as follows:
 
Year ended December 31,
 
 
 
 
2017
 
 
19,117
 
2018
 
 
6,312
 
 
 
$
25,429