Fixation of enzymes with bis-dithioesters

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4767706
SERIAL NO

06853639

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

Enzymes are fixed on carriers with a bis-dithioester capable of combining with the enzyme and with the carrier. The bis-dithioester has at each of its ends a group capable of reacting with an aimine function. The enzyme may be contacted with the bis-dithioester before the enzyme and carrier are combined. The carrier is an inorganic or organic solid.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
Societe Nationale Elf Aquitaine (Production)COURBEVOIE19

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Levesque, Guy Thaon, FR 7 56
Seris, Jean-Louis Jurancon, FR 10 126

Cited Art Landscape

Patent Info (Count) # Cites Year
 
TOYO JOZO KABUSHIKI KAISHA (1)
* 4287345 Polyfunctional disulfide compounds having S--S exchange reactivity 9 1980
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
HALLIBURTON ENERGY SERVICES, INC. (38)
7829507 Subterranean treatment fluids comprising a degradable bridging agent and methods of treating subterranean formations 7 2003
8541051 On-the fly coating of acid-releasing degradable material onto a particulate 0 2003
7475728 Treatment fluids and methods of use in subterranean formations 25 2004
7413017 Methods and compositions for inducing tip screenouts in frac-packing operations 31 2004
* 7648946 Methods of degrading filter cakes in subterranean formations 6 2004
* 7553800 In-situ filter cake degradation compositions and methods of use in subterranean formations 16 2004
7506689 Fracturing fluids comprising degradable diverting agents and methods of use in subterranean formations 59 2005
7621334 Acidic treatment fluids comprising scleroglucan and/or diutan and associated methods 16 2005
7547665 Acidic treatment fluids comprising scleroglucan and/or diutan and associated methods 28 2005
7662753 Degradable surfactants and methods for use 2 2005
7608567 Degradable surfactants and methods for use 14 2005
7640985 Methods of directional drilling and forming kickoff plugs using self-degrading cement in subterranean well bores 3 2005
7637319 Kickoff plugs comprising a self-degrading cement in subterranean well bores 3 2005
7497258 Methods of isolating zones in subterranean formations using self-degrading cement compositions 28 2005
7595280 Delayed tackifying compositions and associated methods involving controlling particulate migration 13 2005
7484564 Delayed tackifying compositions and associated methods involving controlling particulate migration 27 2005
7713916 Orthoester-based surfactants and associated methods 0 2005
7461697 Methods of modifying particulate surfaces to affect acidic sites thereon 29 2005
7431088 Methods of controlled acidization in a wellbore 8 2006
7608566 Degradable particulates as friction reducers for the flow of solid particulates and associated methods of use 13 2006
7598208 Filter cake degradation compositions and methods of use in subterranean operations 14 2006
7455112 Methods and compositions relating to the control of the rates of acid-generating compounds in acidizing operations 32 2006
7686080 Acid-generating fluid loss control additives and associated methods 3 2006
7674753 Treatment fluids and methods of forming degradable filter cakes comprising aliphatic polyester and their use in subterranean formations 2 2006
8220548 Surfactant wash treatment fluids and associated methods 0 2007
8329621 Degradable particulates and associated methods 0 2007
* 2008/0027,157 Degradable particulates and associated methods 20 2007
8598092 Methods of preparing degradable materials and methods of use in subterranean formations 2 2007
8006760 Clean fluid systems for partial monolayer fracturing 8 2008
7906464 Compositions and methods for the removal of oil-based filtercakes 13 2008
* 2009/0286,701 Compositions and Methods for the Removal of Oil-Based Filtercakes 4 2008
7833943 Microemulsifiers and methods of making and using same 13 2008
* 2010/0081,587 Microemulsifiers and methods of making and using same 10 2008
8188013 Self-degrading fibers and associated methods of use and manufacture 2 2009
7833944 Methods and compositions using crosslinked aliphatic polyesters in well bore applications 36 2009
8082992 Methods of fluid-controlled geometry stimulation 2 2009
7700525 Orthoester-based surfactants and associated methods 1 2009
7960314 Microemulsifiers and methods of making and using same 9 2010
 
AVENTIS PHARMACEUTICALS HOLDINGS INC., A CORP. OF DELAWARE (1)
* 6528292 Derivatized polystyrene and other polymer supports for spectroscopic studies 0 1995
 
AVENTIS PHARMACEUTICALS PRODUCTS INC. (1)
* 6391980 Activated and conjugated polystyrene substrate 4 1995
* Cited By Examiner