Patents by Inventor Utpal R. Chakraborty

Utpal R. Chakraborty has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5597688
    Abstract: The present invention provides a novel cellular fixative composition and method of cellular fixing and cellular analysis wherein cells may be fixed for further analysis without destroying the cell's surface markers, cellular morphology, and the cell's light scattering properties. Treatment of cells with the fixative as described herein also allows antibodies or .other desired components to enter the cell through the cellular membrane, without allowing important contents of the cell to escape. As an added benefit, the fixative composition of the invention may also kill or at least inactivate or reduce the activity of deadly virus contained in the cell. In its broadest aspect, the presently claimed fixative composition comprises at least three components, and in more preferred embodiments, four components.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: January 28, 1997
    Assignee: Ortho Diagnostic Systems Inc.
    Inventors: Mark C. Connelly, Utpal R. Chakraborty, Houston G. Brooks, Jr.
  • Patent number: 5571726
    Abstract: A method and test kit useful in a wide variety of immunoassay systems. A method of producing metal sol reagents containing metal sol particles of a preselected size is provided. A metal containing solution is reduced under optimized pH conditions to produce metal sol particles of a preselected size, the particles are coated with a coupling compound and then bound with at least one selected immunochemically reactive component. Particles having different immunochemical specificities are also mixed to produce reagents having multiple selected immunochemical specificities.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: November 5, 1996
    Assignee: Ortho Diagnostic Systems, Inc.
    Inventors: Houston G. Brooks, Jr., Chi-Deu Chang, Utpal R. Chakraborty, Henry A. Graham, Jr., Lloyd L. Hollenbeck, Jr., Sharon R. Lawler, Jennifer Nasser, Ernest G. Schutt, Albert Venturini
  • Patent number: 5514602
    Abstract: A method and test kit useful in a wide variety of immunoassay systems. A method of producing metal sol reagents containing metal sol particles of a preselected size is provided. A metal containing solution is reduced under optimized pH conditions to produce metal sol particles of a preselected size, the particles are coated with a coupling compound and then bound with at least one selected immunochemically reactive component. Particles having different immunochemical specificities are also mixed to produce reagents having multiple selected immunochemical specificities.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: May 7, 1996
    Assignee: Ortho Diagnostic Systems, Inc.
    Inventors: Houston G. Brooks, Jr., Chi-Deu Chang, Utpal R. Chakraborty, Henry A. Graham, Jr., Lloyd L. Hollenbeck, Jr., Sharon R. Lawler, Jennifer Nasser, Ernest G. Schutt, Albert Venturini
  • Patent number: 5422277
    Abstract: A cell fixative composition for fixing the internal components of a cell without disrupting the cell surface components is disclosed. The composition contains a compound for preserving intracellular morphology, a compound for fixing internal components of the cell, a compound which facilitates transportation of components across the cellular membrane, and a compound for increasing permeability of cell membranes. Methods for analyzing cells which have been fixed using the composition are also disclosed.
    Type: Grant
    Filed: March 27, 1992
    Date of Patent: June 6, 1995
    Assignee: Ortho Diagnostic Systems Inc.
    Inventors: Mark C. Connelly, Utpal R. Chakraborty, Houston G. Brooks, Jr.
  • Patent number: 4794188
    Abstract: Compounds of the formula:Ar.sub.1 -X-Ar-Z-(R).sub.n'and salts thereof, whereinAr.sub.1 is a nitrogen, sulfur or oxygen heterocyclic ring;Ar is a phenyl ring or a nitrogen, oxygen or sulfur heterocyclic ring;Ar and Ar.sub.1 may be fully substituted or less than fully substituted with H, CH.sub.3, lower alkyl, aryl, aralkyl, halo, hydroxy, lower alkoxy, CF.sub.
    Type: Grant
    Filed: December 19, 1985
    Date of Patent: December 27, 1988
    Assignee: USV Pharmaceutical Corporation
    Inventors: John H. Musser, Utpal R. Chakraborty
  • Patent number: 4778931
    Abstract: The invention relates to several aryloxy-alkane alcohols, for example 1-(3-(1-hydroxy-1-methylhexyl) phenoxy methyl)-2-methoxy-naphthalene, 2-(1-(3-(1-hydroxy-2,2-dimethylhexyl)phenoxy)ethyl naphthalene, 1-(3-6-phenoxy-1-hydroxyhexyl)phenoxy methyl)-4-methoxy naphthalene, 2-(3-(1-hydroxyhexyl) phenoxymethyl) naphthalene and 2-(3-(1-hydroxyhexyl)phenoxymethyl)-1,2,3,4-tetrahydro naphthalene, methods for their preparation and their use for treating inflammatory and allergic conditions in a mammal.
    Type: Grant
    Filed: November 29, 1985
    Date of Patent: October 18, 1988
    Assignee: USV Pharmaceutical Corporation
    Inventors: John H. Musser, Utpal R. Chakraborty
  • Patent number: 4728668
    Abstract: The present invention is concerned with the therapeutic composition comprising as an active ingredient a compound of the formula:(R.sub.1)(R.sub.2) Ar--Z--M--Ar.sub.1 (R.sub.3)(R.sub.4) Iand salts thereof;whereinAr and Ar.sub.1 are independently phenyl, naphthyl or a nitrogen, oxygen, or sulfur heterocyclic ring;Z is an alkylene chain containing from 1 to 5 carbon atoms in the principal chain and up to a total of 10 carbon atoms;M is oxygen, sulfur, or NR.sub.5 ;R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently H, lower alkyl, lower alkoxy, hydroxy, halo, trihalomethyl, hydroxy lower alkyl, carboxy, formyl, aryl, aryloxy, benzyloxy, lower alkanoyl, carboxy lower alkoxy, nitro, amino, lower alkylamino, dilower alkylamino, cyano, lower alkanoyloxy, carbamoyl, lower alkoxy-alkoxy, carbo-lower alkoxy-alkoxy, or tetrahydropyranylmethyl; andR.sub.5 is hydrogen or lower alkyl.
    Type: Grant
    Filed: June 23, 1986
    Date of Patent: March 1, 1988
    Assignee: USV Pharmaceutical Corporation
    Inventors: Utpal R. Chakraborty, Raymond D. Youssefyeh
  • Patent number: 4725619
    Abstract: The present invention is concerned with the therapeutic composition comprising as an active ingredient a compound of the formula:(R.sub.1)(R.sub.2) Ar--Z--M--Ar.sub.1 (R.sub.3)(R.sub.4) Iand salts thereof; whereinAr and Ar.sub.1 are independently phenyl, naphthyl or a nitrogen, oxygen, or sulfur heterocyclic ring;Z is an alkylene chain containing from 1 to 5 carbon atoms in the principal chain and up to a total of 10 carbon atoms;M is oxygen, sulfur, or NR.sub.5 ;R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently H, lower alkyl, lower alkoxy, hydroxy, halo, trihalomethyl, hydroxy lower alkyl, carboxy, formyl, aryl, aryloxy, benzyloxy, lower alkanoyl, carboxy lower alkoxy, nitro, amino, lower alkylamino, dilower alkylamino, cyano, lower alkanoyloxy, carbamoyl, lower alkoxy-alkoxy, carbo-lower-alkoxy-alkoxy, or tetrahydropyranylmethyl; andR.sub.5 is hydrogen or lower alkyl.
    Type: Grant
    Filed: June 23, 1986
    Date of Patent: February 16, 1988
    Assignee: USV Pharmaceutical Corporation
    Inventors: Utpal R. Chakraborty, Raymond D. Youssefyeh
  • Patent number: 4631287
    Abstract: The present invention is concerned with the therapeutic composition comprising as an active ingredient a compound of the formula:(R.sub.1)(R.sub.2)Ar--Z--M--Ar.sub.1 (R.sub.3)(R.sub.4) Iand salts thereof;whereinAr and Ar.sub.1 are independently phenyl, naphthyl or a nitrogen, oxygen, or sulfur heterocyclic ring;Z is an alkylene chain containing from 1 to 5 carbon atoms in the principal chain and up to a total of 10 carbon atoms;M is oxygen, sulfur, or NR.sub.5 ;R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently H, lower alkyl, lower alkoxy, hydroxy, halo, trihalomethyl, hydroxy lower alkyl, carboxy, formyl, aryl, aryloxy, benzyloxy, lower alkanoyl, carboxy lower alkoxy, nitro, amino, lower alkylamino, dilower alkylamino, cyano, lower alkanoyloxy, carbamoyl, lower alkoxy-alkoxy, carbo-lower-alkoxy-alkoxy, or tetrahydropyranylmethyl; andR.sub.5 is hydrogen or lower alkyl.
    Type: Grant
    Filed: April 16, 1985
    Date of Patent: December 23, 1986
    Assignee: USV Pharmaceutical Corp.
    Inventors: Utpal R. Chakraborty, Raymond D. Youssefyeh
  • Patent number: 4567184
    Abstract: Compounds of the structure ##STR1## and pharmaceutically acceptable salts thereof, wherein R.sub.1 and R.sub.2 are independently hydrogen, alkyl, carboxy, alkylcarboxy, arylcarboxy, alkyl carbalkoxy, alkanoyl, formyl, nitrile, amino, amino alkyl, alkylamine, carboxamide, halo, trihalomethyl, hydroxy, alkoxy, aryloxy, nitro, sulfonyl, sulfonamide, thio, alkylthio, or R.sub.1 and R.sub.2 can be taken together to form a phenyl ring;B is C or N, in which N can be in any position of the ring;X is O, S, NR.sub.4, CH.sub.2 Z, CH.dbd.N, CH.dbd.CH, C.tbd.C, CH.sub.2 ZCH.sub.2, C.dbd.O, C.dbd.CR or WC.dbd.O;Y is CHCH.sub.2, C.dbd.CH, C--CH.sub.2, CHCHR.sub.5, CHC(R.sub.5).sub.2 or CC(R.sub.5).sub.2 ;R.sub.3 is O, OH, OR.sub.4, SH, SR.sub.4, NH, HNR.sub.4 or N(R.sub.4).sub.2 ; andM is an integer from 0 to 10; wherein Z is O, S or NR.sub.4 ; R.sub.4 is H, alkyl or aryl;W is O, S or NR.sub.4 ; and R.sub.5 is H, alkyl or fluoro have antiinflammatory and antiallergic activities.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: January 28, 1986
    Assignee: USV Pharmaceutical Corporation
    Inventors: John H. Musser, Utpal R. Chakraborty