Richmond, Texas
United States
21
2010-07-01
The entities that hold a legal rights for patent applications filed by inventor Chen Yiyan:
Yiyan Chen from Richmond, US has applied for patents for these inventions. The list has both pending applications and granted patents:
Internal breaker for oilfield treatments
#2 | 2009-06-11Viscoelastic surfactant fluid systems comprising an aromatic sulfonate and methods of using same
#3 | 2008-07-10Additive for viscoelastic fluid
#4 | 2008-06-12Viscoelastic surfactant fluid systems comprising an aromatic sulfonate and methods of using same
#5 | 2008-03-20Oxidative internal breaker for viscoelastic surfactant fluids
#6 | 2008-03-20Carbon dioxide foamed fluids
#7 | 2008-03-20Internal breaker for oilfield fluids
#8 | 2008-02-28Surfactants not toxic to bacteria
#9 | 2007-10-30Internal breaker for oilfield fluids
#10 | 2007-02-08Internal breaker for oilfield treatments
#11 | 2006-12-12Viscoelastic surfactant fluids stable at high brine concentration and methods of using same
#12 | 2006-10-12Rheology enhancers
#13 | 2006-08-24Rheology modifiers
#14 | 2006-07-20Well treatment with dissolvable polymer
#15 | 2006-07-06Foamed viscoelastic surfactants
#16 | 2006-06-15Viscoelastic surfactant rheology modification
#17 | 2006-06-15Viscoelastic surfactant rheology modification
#18 | 2006-05-25Viscoelastic surfactant rheology modification
#19 | 2005-07-21Additive for viscoelastic fluid
#20 | 2005-06-09Carbon dioxide foamed fluids
#21 | 2005-02-10Gravel packing method
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