US Patent No: 4,957,638

Number of patents in Portfolio can not be more than 2000

Method for separating the cellular components of blood samples

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Abstract

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An assembly for separating lymphocytes and monocytes from granulocytes in a sample of unseparated whole blood. A water insoluble, thixotropic gel-like substance, which is chemically inert to blood constituents is provided in a container. A fluid capable of altering blood cell densities and diameters is positioned above the surface of the water-insoluble thixotropic gel-like substance. Means for preventing the absorption of water by the thixotropic gel-like substance from the fluid and/or the sample of unseparated whole blood prior to separation are provided to substantially eliminate the influence of water absorption on the cell separation performance characteristics of said thixotropic gel-like substance. A method for separating lymphocytes and monocytes from granulocytes which inhibits the apparent shift of the buoyant density of the granulocytes and which substantially eliminates the influence of water absorption on the cell separation performance characteristics of the thixotropic gel-like substance is also disclosed.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
BECTON, DICKINSON AND COMPANYFRANKLIN LAKES, NJ1824

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Smith, Ward C Mahwah, NJ 12 524

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Technicon Instruments Corporation (1)
* 4,487,700 Method and apparatus for separating lymphocytes from anticoagulated blood 25 1983
 
ORTHO DIAGNOSTIC SYSTEMS INC. (2)
* 4,435,293 Particle washing system and method of use 25 1981
* 4,436,631 Multiple particle washing system and method of use 33 1982
 
SHERWOOD SERVICES AG (1)
* 4,295,974 Blood sample collection and phase separation device 28 1980
 
Sekisui Kagaku Kogyo Kabushiki (2)
* 4,457,782 Composition for partitioning blood components 21 1981
* 4,534,798 Composition for partitioning blood components 13 1983
 
ASSAF SCIENTIFIC DEVELOPMENT CORPORATION LTD. (1)
* 4,824,560 Separation of materials from a liquid dispersion by sedimentation 31 1986
 
TERUMO KABUSHIKI KAISHA (1)
* 4,310,430 .alpha.-Olefin-dialkylmaleate-based liquid separating agent 23 1980
 
BECTON, DICKINSON AND COMPANY (5)
* 4,417,981 Blood phase separator device 96 1981
* 4,640,785 Separation of lymphocytes and monocytes from blood samples 22 1984
* 4,816,168 Separation of lymphocytes and monocytes from blood samples 30 1986
* 4,844,818 Method for separating the cellular components of blood samples 69 1987
* 4,867,887 Method and apparatus for separating mononuclear cells from blood 33 1988
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (2)
* 2001/0007,315 Method and apparatus for dispensing separator gel in a blood collection tube 1 2001
9,114,334 Apparatus and method for separating and concentrating fluids containing multiple components 0 2013
 
RESPONSE BIOMEDICAL CORPORATION (1)
* 6,046,019 Diagnostic kits and methods for making granulocyte cell counts 12 1992
 
HANUMAN LLC (15)
7,824,559 Apparatus and method for preparing platelet rich plasma and concentrates thereof 18 2006
7,708,152 Method and apparatus for preparing platelet rich plasma and concentrates thereof 23 2006
7,866,485 Apparatus and method for preparing platelet rich plasma and concentrates thereof 18 2007
7,992,725 Buoy suspension fractionation system 5 2008
7,806,276 Buoy suspension fractionation system 24 2008
7,837,884 Methods and apparatus for isolating platelets from blood 17 2008
7,987,995 Method and apparatus for preparing platelet rich plasma and concentrates thereof 10 2010
8,119,013 Method of separating a selected component from a multiple component material 5 2010
8,096,422 Apparatus and method for preparing platelet rich plasma and concentrates thereof 1 2010
8,187,477 Methods and apparatus for isolating platelets from blood 2 2010
8,105,495 Method for preparing platelet rich plasma and concentrates thereof 1 2011
8,133,389 Method and apparatus for preparing platelet rich plasma and concentrates thereof 6 2011
8,328,024 Buoy suspension fractionation system 2 2011
8,596,470 Buoy fractionation system 4 2012
8,950,586 Methods and apparatus for isolating platelets from blood 0 2013
 
PLASMASEAL CORPORATION (2)
* 5,788,662 Methods for making concentrated plasma and/or tissue sealant 136 1996
* 6,214,338 Plasma concentrate and method of processing blood for same 98 2000
 
BIOMET BIOLOGICS, LLC (20)
7,374,678 Apparatus and method for separating and concentrating fluids containing multiple components 55 2004
7,845,499 Apparatus and method for separating and concentrating fluids containing multiple components 31 2006
7,832,566 Method and apparatus for separating and concentrating a component from a multi-component material including macroparticles 17 2006
7,914,689 Apparatus and method for separating and concentrating fluids containing multiple components 23 2008
7,780,860 Apparatus and method for separating and concentrating fluids containing multiple components 19 2008
8,012,077 Blood separating device 4 2008
8,337,711 System and process for separating a material 1 2009
8,187,475 Method and apparatus for producing autologous thrombin 1 2009
8,313,954 All-in-one means of separating blood components 9 2009
9,011,800 Method and apparatus for separating biological materials 1 2009
8,591,391 Method and apparatus for separating a material 0 2010
8,048,321 Apparatus and method for separating and concentrating fluids containing multiple components 19 2010
8,808,551 Apparatus and method for separating and concentrating fluids containing multiple components 2 2010
8,062,534 Apparatus and method for separating and concentrating fluids containing multiple components 22 2010
8,163,184 Apparatus and method for separating and concentrating fluids containing multiple components 2 2011
8,567,609 Apparatus and method for separating and concentrating fluids containing multiple components 7 2011
8,603,346 Apparatus and method for separating and concentrating fluids containing multiple components 0 2011
8,783,470 Method and apparatus for producing autologous thrombin 2 2012
8,992,862 All-in-one means of separating blood components 1 2012
8,801,586 System and process for separating a material 2 2012
 
COVIDIEN AG (1)
6,238,578 Method for dispensing separator gel in a blood collection tube 14 1996
 
FENWAL, INC. (6)
7,166,231 Red blood cell separation method 17 2003
7,297,272 Separation apparatus and method 8 2004
8,685,258 Systems and methods for conveying multiple blood components to a recipient 0 2009
8,075,468 Systems and methods for mid-processing calculation of blood composition 4 2009
7,918,350 Separation apparatus and method 2 2009
7,789,245 Blood separation chamber 12 2009
 
COLEMAN, CHARLES M. (2)
* 5,560,830 Separator float and tubular body for blood collection and separation and method of use thereof 71 1994
* 5,736,033 Separator float for blood collection tubes with water swellable material 83 1996
 
CASCADE MEDICAL ENTERPRISES LLC (4)
* 7,745,106 Methods and devices for separating liquid components 18 2003
* 2004/0071,786 Methods and devices for separating liquid components 10 2003
8,491,564 Systems and methods for preparing autologous fibrin glue 0 2009
8,802,362 Methods and devices for separating liquid components 0 2010
 
CLINICAL DIAGNOSTIC SYSTEMS INC. (1)
* 5,364,591 Device for moving a target-bearing solid through a liquid for detection while being contained 68 1992
 
DENDREON PHARMACEUTICALS, INC. (6)
* 5,840,502 Methods for enriching specific cell-types by density gradient centrifugation 106 1994
* 5,648,223 Methods for enriching breast tumor cells 43 1994
* 5,646,004 Methods for enriching fetal cells from maternal body fluids 56 1994
* 5,577,513 Centrifugation syringe, system and method 64 1994
* 5,474,687 Methods for enriching CD34.sup.+ human hematopoietic progenitor cells 62 1994
* 5,663,051 Separation apparatus and method 83 1995
 
Advanced Minerals Corporation (1)
* 6,140,040 Method of mechanically separating microparticles suspended in fluids using particulate media 19 1996
 
BECTON, DICKINSON AND COMPANY (2)
* 5,494,590 Method of using anticoagulant solution in blood separation 50 1992
* 5,906,744 Tube for preparing a plasma specimen for diagnostic assays and method of making thereof 35 1997
* Cited By Examiner