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/* Graphical representation of assignee’s holding patents of foam fracturing */
'''Table: Foam Fracturing patent of different Companies.'''
{|border="2" cellspacing="0" cellpadding="4" width="100102%"
|align = "center" bgcolor = "#9BBB59" colspan = "4"|'''Foam Fracturing'''
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|align = "center" bgcolor = "#9BBB59"|'''Comment'''
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|align = "center" bgcolor = "#9BBB59" rowspan = "2"|'''1'''|align = "center" rowspan = "2"|'''Halliburton'''
|align = "center"|<font color="#0000FF"><u>[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5990052.PN.&OS=PN/5990052&RS=PN/5990052 US5990052A]</u></font>
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|align = "center"|<font color="#0000FF"><u>US5310002A</u></font>
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|align = "center" bgcolor = "#9BBB59"|2|align = "center"|'''Baker Hughes2'''|align = "center"|<font color="nowiki>###0000FF"><u/nowiki>[http://patft.uspto.gov/netacgi/nph-Parser?Sect1|align =PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5424285.PN.&OS=PN/5424285&RS=PN/5424285 US5424285A]"center"|</unowiki>****</fontnowiki>|align = "center"|Foam fracturing fluids containing a major component of nitrogen and a minor component of carbon dioxide was used for performing fracturing of the formation<nowiki>****</nowiki>
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|align = "center" bgcolor = "#9BBB59"|3|align = "center"|'''Marathon Oil Co3'''|align = "center"|<font color="nowiki>###0000FF"><u/nowiki>[http://patft.uspto.gov/netacgi/nph-Parser?Sect1|align =PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5780395.PN.&OS=PN/5780395&RS=PN/5780395 US5780395A]"center"|</unowiki>****</fontnowiki>|align = "center"|Foam for improving sweep efficiency in subterranean oil-bearing formations<nowiki>****</nowiki>
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