1
Lawrence Kass: Metachromatic dye sorption means for differential determination of sub-populations of lymphocytes. Richard G Smith, October 7, 1986: US04615878 (43 worldwide citation)

Differentiation, identification and enumeration of sub-populations of lymphocytes including B-cells and T-cells can now be further discriminated into their sub-populations by means of basic orange 21 as a supravital stain to provide distinctive morphologic differences between B-cells, T-suppressor c ...


2
Lawrence Kass, Leonard Spolter: Composition and method for enrichment of white blood cells from whole human blood. International Remote Imaging Systems, Limbach & Limbach, March 14, 1995: US05397479 (43 worldwide citation)

A composition and method for separating red blood cells from whole blood including a rouleaux-forming aggregator and an enhancer for enhancing the settling rate. The enhancer is a material which alters directly or indirectly the properties of the red blood cell and may alter the structure and/or rea ...


3
Lawrence Kass, Leonard Spolter: Composition and method for enrichment of white blood cells from whole human blood. International Remote Imaging Systems, Limbach & Limbach, January 9, 1996: US05482829 (35 worldwide citation)

A composition and method for separating red blood cells from whole blood comprising a rouleaux-forming aggregator and an enhancer for enhancing the settling rate. The enhancer is a material which alters directly or indirectly the properties of the red blood cell and may alter the structure and/or re ...


4
Lawrence Kass: Metachromatic dye sorption means for differential determination of leukocytes. Fay & Sharpe, August 23, 1983: US04400370 (29 worldwide citation)

In the diagnosis and prognosis of various diseases as well as medical researches in relation thereto studies leading to differentiation, identification, enumeration and following the variations in human blood, leukocytes play a vital role. Heretofore, accurate detailed lengthy and arduous procedures ...


5
Lawrence Kass: Individual leukocyte determination by means of differential metachromatic dye sorption. Richard G Smith, April 8, 1986: US04581223 (27 worldwide citation)

Lengthy cytochemical procedures for differentiation, identification, enumeration and diagnostic study of leukocytes in human blood have been advanced and shortened by a rapid method of optical differentiation of the five individual white blood cell species by selective use of basic quaternary metach ...


6
Lawrence Kass: Method of staining cells with a diazo dye and compositions thereof. Cytocolor, Pearne Gordon McCoy & Granger, August 1, 1989: US04853210 (18 worldwide citation)

This invention relates to the cytology of blood, bone marrow, and lumpth node cells, and a method of differentiating, identifying, and enumerating said cells among a plurality of cells of hematopoietic origin. More specifically, the invention is directed to the use of basic cationic diazo dyes capab ...


7
Lawrence Kass: Metachromatic dye sorption and fluorescent light emmisive means for differential determination of developmental stages of neutrophilic granulocytic cells and other leukocytes. Fay & Sharpe, February 19, 1985: US04500509 (13 worldwide citation)

Differentiation, identification and enumeration of dye responsive human blood cells essential to diagnosis and prognosis of certain diseases is established by preparation of the reaction product of a human blood specimen of the patient in an aqueous fixative-free environment at blood temperatures wi ...


8
Lawrence Kass: Method of staining and identifying cells and compositions thereof. Cytocolor Incorporated, Pearne Gordon McCoy & Granger, December 22, 1987: US04714606 (11 worldwide citation)

This invention is directed to the cytology of blood, bone marrow and lymph node cells and the method of differentiating, identifying and enumerating said cells among a plurality of cells of hematopoietic origin. More specifically, the invention is directed to the use of a single cationic sulfur-cont ...


9
Lawrence Kass: Oxazine stained lymphocytes and method. Cytocolor, April 18, 1995: US05407794 (11 worldwide citation)

Peripheral blood lymphocytes displayed a plurality of sizes and colors when exposed first to a fixative solution of C.I. basic blue 141, then to an aqueous alkaline solution of the same dye and subsequently treated with a neutral HEPES buffer solution containing small but effective amounts of variou ...


10
Lawrence Kass: Method of staining monocytes and compositions thereof. Cytocolor, April 21, 1992: US05106744 (9 worldwide citation)

This invention is directed to the cytology of blood, bone marrow and lymph node cells and to the method of differentiating, identifying and enumerating monocytes among a plurality of cells of hematopoietic origin. More specifically, the invention is directed to stained cells and to the use of a cati ...