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System of pipes for use in oil wells
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Patent number 8,453,740
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Issue date Jun 4, 2013
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E. I. Du Pont de Nemours and Company
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Pidatala K. Mohan
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Reinforced polymeric siphon tubes
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Patent number 8,100,183
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Issue date Jan 24, 2012
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E. I. Du Pont de Nemours and Company
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Steven A. Mestemacher
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E21 - EARTH DRILLING MINING
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Coated pipes for harsh environments
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Patent number 7,870,877
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Issue date Jan 18, 2011
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E. I. Du Pont de Nemours and Company
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Laurence Waino McKeen
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B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
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Coated pipes for harsh environments
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Patent number 7,588,058
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Issue date Sep 15, 2009
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E. I. Du Pont de Nemours and Company
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Laurence Waino McKeen
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B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
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