Patents by Inventor Kishor Desai

Kishor Desai 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: 6231833
    Abstract: Substituted pyrido[1,2-a]pyrazines of general formula I; wherein Ar and Ar1 represent various carbocyclic and heterocyclic aromatic rings; A represents O, S, SO, SO2, CHOH, C═O, or —(CR3R4); and n is 0-2, as well as precursors thereto, are ligands for dopamine receptor subtypes and serotonin (5HT) within the body and are therefore useful in the treatment of disorders of the dopamine and serotonin systems:
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: May 15, 2001
    Assignee: Pfizer Inc
    Inventors: Kishor A. Desai, Anton F. J. Fliri, Mark A. Sanner
  • Patent number: 6166020
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.4, R.sup.23, R.sup.24, R.sup.25 and R.sup.26 are defined as in the specification.These compounds are useful psychotherapeutics and are potent serotonin (5-HT.sub.1) agonists and antagonists.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: December 26, 2000
    Assignee: Pfizer Inc.
    Inventors: Harry R. Howard, Jr., Bertrand L. Chenard, John E. Macor, Kevin D. Shenk, Kishor A. Desai
  • Patent number: 6133064
    Abstract: Methods and apparatus pertaining to flip chip ball grid array packages are disclosed. A substrate comprises a base layer with a dielectric laminated thereon such that a cavity in the dielectric exposes the base layer. A die is then mounted to the exposed portion of the base layer. Preferably, an upper portion of the dielectric forms a frame for receiving a heat spreader.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: October 17, 2000
    Assignee: LSI Logic Corporation
    Inventors: Kumar Nagarajan, Kishor Desai
  • Patent number: 5852031
    Abstract: Substituted pydrido?1,2-a!pyrazines of general formula I wherein Ar and Ar.sup.1 represent various carbocyclic and heterocyclic aromatic rings; A represents O, S, SO, SO.sub.2, C.dbd.O, CHOH, or --(CR.sup.3 R.sup.4) and n is 0-2 as well as precursors thereto are ligands for dopamine receptor subtypes within the body and are therefore useful in the treatment of disorders of the dopamine system.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: December 22, 1998
    Assignee: Pfizer Inc.
    Inventors: Kishor A. Desai, Anton F. J. Fliri, Mark A. Sanner
  • Patent number: 5731307
    Abstract: The instant invention is directed to compounds, compositions and antipsychotic methods of use wherein the compounds are of formula I: ##STR1## wherein Y is an imide or benzoyl alkyl group and X is a cycloalkyl, phenyl or dibenzoazepinyl group.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: March 24, 1998
    Assignee: Pfizer, Inc.
    Inventor: Kishor A. Desai
  • Patent number: 5565453
    Abstract: Antipsychotic compounds having the formula ##STR1## wherein R is hydrogen, acyl or substituted acyl; and a pharmaceutically acceptable acid addition salt thereof.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: October 15, 1996
    Assignee: Pfizer Inc.
    Inventors: Gene M. Bright, Kishor A. Desai, Thomas F. Seeger, Teresa A. Smolarek
  • Patent number: 5157034
    Abstract: Antipsychotic compounds having the formula ##STR1## wherein Z is H or Cl; Y is O or S; n is 1-4; separately, X is H or (C.sub.1 -C.sub.2)alkyl and L is R(CH.sub.2).sub.m CO, m is 0 or 1-3, R is (C.sub.1 -C.sub.6)alkyl, (C.sub.3 -C.sub.7)cycloalkyl, phenyl, naphthyl, furyl, benzofuranyl, thienyl, benzothienyl, pyrrolyl, indolyl, isoindolyl or one of said groups substituted on aromatic or heteroaromatic ring with fluoro, chloro, (C.sub.1 -C.sub.2)alkyl or (C.sub.1 -C.sub.2)alkoxy; or together L and X, in combination with the nitrogen to which they are attached, form certain cyclic imides, 4-substituted piperidines or a cyclic sulfonamide.
    Type: Grant
    Filed: February 27, 1991
    Date of Patent: October 20, 1992
    Assignee: Pfizer Inc.
    Inventors: Gene M. Bright, Kishor A. Desai, Thomas F. Seeger
  • Patent number: 5122525
    Abstract: Anxiolytic agents which are racemic or optically active pyrido[1,2-a]pyrazine derivatives of the formula ##STR1## wherein x is N or CH and Y represents one of certain pyrazolo, triazolo, tetrazolo or cyclic imido radicals; and intermediates therefor.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: June 16, 1992
    Assignee: Pfizer Inc.
    Inventors: Gene M. Bright, Kishor A. Desai
  • Patent number: 4235806
    Abstract: Cationic yellow methine dyes represented by the structure: ##STR1## where R.sup.1 is alkyl or cyanoalkyl, said alkyl being of 1-4 carbons;R.sup.2 is H, Cl, Br or NO.sub.2 ;R.sup.3 is H or CH.sub.3 ; andn is 2 or 3;Q is N(CH.sub.3).sub.3, ##STR2## where R.sup.4 is alkyl of 1-4 carbons, benzyl, monochlorobenzyl or monobromobenzyl; andA is an anion.The dyes are particularly useful in the dyeing of unbleached paper pulp and have excellent substantivity and desired fastness properties.
    Type: Grant
    Filed: April 5, 1979
    Date of Patent: November 25, 1980
    Assignee: American Color & Chemical Corporation
    Inventor: Kishor A. Desai
  • Patent number: 4211697
    Abstract: Cationic azo dyes useful for dyeing paper pulp and characterized by their outstanding affinity for paper pulp, both under waterleaf and sized dyeing conditions, are provided. The dyes have the structural formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, Q, X and n are specifically defined.
    Type: Grant
    Filed: January 18, 1979
    Date of Patent: July 8, 1980
    Assignee: American Color & Chemical Corporation
    Inventor: Kishor A. Desai
  • Patent number: 4204994
    Abstract: Cationic disazo dyes useful for dyeing paper pulp and characterized by outstanding affinity for paper pulp, both under waterleaf and sized dyeing conditions, are provided. The dyes have the structural formula: ##STR1## wherein R.sup.5, R.sup.6, R.sup.7, R.sup.2, R.sup.3, n, Q and X are specifically defined.
    Type: Grant
    Filed: January 18, 1979
    Date of Patent: May 27, 1980
    Assignee: American Color & Chemical Corporation
    Inventor: Kishor A. Desai