Patents by Inventor Biman Pal

Biman Pal 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).

  • Amino acid-derived diaminopropanols
    Patent number: 6063963
    Abstract: The present invention relates to a method of forming a 1,3-diamino-3-substituted-2-propanol chemical intermediate from which various chemicals, such as selected protease-inhibitors and other drugs, as well as polymers, can be synthesized.The method includes contacting a nitromethyl amino acid compound with at least one reducing agent to form the 1,3-diamino-3-substituted-2-propanol chemical intermediate.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: May 16, 2000
    Assignee: Pharm-Eco Laboratories, Inc.
    Inventors: Biman Pal, Siya Ram, Bing Cai, Yesh P. Sachdeva, Jaechul Shim, Salah A. Zahr, Emile Al-Farhan, Richard Gabriel
  • Method of forming amino acid-derived diaminopropanols useful as chemical intermediates for protease-inhibitors
    Patent number: 5631405
    Abstract: The present invention relates to a method of forming a 1,3-diamino-3-substituted-2-propanol chemical intermediate from which various chemicals, such as selected protease-inhibitors and other drugs, as well as polymers, can be synthesized.This method includes contacting a nitromethyl amino acid compound with at least one reducing agent to form the 1,3-diamino-3-substituted-2-propanol chemical intermediate.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 20, 1997
    Assignee: Pharm-Eco Laboratories, Incorporated
    Inventors: Biman Pal, Siya Ram, Bing Cai, Yesh P. Sachdeva, Jaechul Shim, Salah A. Zahr, Emile Al-Farhan, Richard L. Gabriel
  • Method forming protease inhibitor synthetic intermediates
    Patent number: 5618966
    Abstract: The present invention relates to a method of forming a 1,3-diamino-3-substituted-2-propanol chemical intermediate from which various chemicals, such as selected protease-inhibitors and other drugs, as well as polymers, can be synthesized.This method includes contacting a nitromethyl amino acid compound with at least one reducing agent to form the 1,3-diamino-3-substituted-2-propanol chemical intermediate.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: April 8, 1997
    Assignee: Pharm-Eco Laboratories, Incorporated
    Inventors: Biman Pal, Siya Ram, Bing Cai, Yesh P. Sachdeva, Jaechul Shim, Salah A. Zahr, Emile Al-Farhan, Richard Gabriel
  • Amino acid-derived diaminopropanols
    Patent number: 5599994
    Abstract: The present invention relates to a method of forming a 1,3-diamino-3-substituted-2-propanol chemical intermediate from which various chemicals, such as selected protease-inhibitors and other drugs, as well as polymers, can be synthesized.The method includes contacting a nitromethyl amino acid compound with at least one reducing agent to form the 1,3-diamino-3-substituted-2-propanol chemical intermediate.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 4, 1997
    Assignee: Pharm-Eco Laboratories, Inc.
    Inventors: Biman Pal, Siya Ram, Yesh P. Sachdeva, Jaechul Shim, Salah A. Zahr, Emile Al-Farhan, Richard L. Gabriel
  • Method preparing amino acid-derived diaminopropanols
    Patent number: 5475138
    Abstract: The present invention relates to a method of forming a 1,3-diamino-3-substituted-2-propanol chemical intermediate from which various chemicals, such as selected protease-inhibitors and other drugs, as well as polymers, can be synthesized.This method includes contacting a nitromethyl amino acid compound with at least one reducing agent to form the 1,3-diamino-3-substituted-2-propanol chemical intermediate.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: December 12, 1995
    Assignee: Pharm-Eco Laboratories Incorporated
    Inventors: Biman Pal, Siya Ram, Bing Cai, Yesh P. Sachdeva, Jaechul Shim, Salah A. Zahr, Emile Al-Farhan, Richard Gabriel