Patents by Inventor Yusuf Khwaja Hamied

Yusuf Khwaja Hamied 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).

  • Pharmaceutically acceptable alendronate salts in amorphous form
    Patent number: 7112577
    Abstract: A pharmaceutically acceptable alendronate salt in an amorphous form.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: September 26, 2006
    Assignee: Cipla Limited
    Inventors: Yusuf Khwaja Hamied, Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan
  • Process for preparing isomers of salbutamol
    Patent number: 6995286
    Abstract: A process for making optically pure (R) and (S) salbutamol comprises obtaining the (R) or (S) isomer of either salbutamol or a salbutamol precursor in substantially optically pure form by resolving a racemic or optically impure mixture of enantiomers of salbutamol or of said precursor with either (L) or (D) tartaric acid, and where necessary converting said isomer of said precursor into either (R or (S) salbutamol respectively; then optionally converting said optically pure (R) and/or (S) salbutamol into a pharmaceutically acceptable salt.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: February 7, 2006
    Assignee: Cipla Limited
    Inventors: Yusuf Khwaja Hamied, Rajendra Narayanrao Kankan, Dharmaraj Ramachandra Rao
  • Preparation of phthalanes
    Patent number: 6903228
    Abstract: Citalopram and other phthalanes are made by reacting a salt of a compound of formula (II) where R1 is halogen and R2 is halogen, trifluoromethyl, cyano or R—CO— where R is a C1-4 alkyl group, with cuprous cyanide.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: June 7, 2005
    Assignee: Cipla Limited
    Inventors: Yusuf Khwaja Hamied, Rajendra Narayaurao Kankan, Dhanmaraj Ramachandra Rao
  • Pharmaceutically acceptable alendronate salts in amorphous form
    Publication number: 20040259846
    Abstract: A pharmaceutically acceptable alendronate salt in an amorphous form.
    Type: Application
    Filed: July 26, 2004
    Publication date: December 23, 2004
    Inventors: Yusuf Khwaja Hamied, Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan
  • Preparation of phthalanes
    Publication number: 20040092755
    Abstract: Citalopram and other phthalanes are made by reacting a salt of a compound of formula (II) where R1 is halogen and R2 is halogen, trifluoromethyl, cyano or R—CO— where R is a C1-4 alkyl group, with cuprous cyanide.
    Type: Application
    Filed: November 18, 2003
    Publication date: May 13, 2004
    Inventors: Yusuf Khwaja Hamied, Rajendra Narayaurao Kankan, Dhanmaraj Ramachandra Rao
  • Process for preparing isomers of salbutamol
    Publication number: 20040054215
    Abstract: A process for making optically pure (R) and (S) salbutamol comprises obtaining the (R) or (S) isomer of either salbutamol or a salbutamol precursor in substantially optically pure form by resolving a racemic or optically impure mixture of enantiomers of salbutamol or of said precursor with either (L) or (D) tartaric acid, and where necessary converting said isomer of said precursor into either (R or (S) salbutamol respectively; then optionally converting said optically pure (R) and/or (S) salbutamol into a pharmaceutically acceptable salt.
    Type: Application
    Filed: September 15, 2003
    Publication date: March 18, 2004
    Inventors: Yusuf Khwaja Hamied, Rajendra Naryanrao Kankan, Dharmaraj Ramachandra Rao
  • Benzimidazole pharmaceutical composition and process of prepatation
    Publication number: 20010053387
    Abstract: A pharmaceutical composition which is a solid pellet comprising an inert core, a benzimidazole in or on the core, a moisture resistant coating around the core, the moisture resistant coating comprising at least one hydrophobic material, and an enteric coating around the moisture resistant coating.
    Type: Application
    Filed: July 9, 2001
    Publication date: December 20, 2001
    Inventors: Yusuf Khwaja Hamied, Vinay G. Nayak, Geena Malhotra
  • Process for preparing isomers of salbutamol
    Patent number: RE43844
    Abstract: A process for making optically pure (R) and (S) salbutamol comprises obtaining the (R) or (S) isomer of either salbutamol or a salbutamol precursor in substantially optically pure form by resolving a racemic or optically impure mixture of enantiomers of salbutamol or of said precursor with either (L) or (D) tartaric acid, and where necessary converting said isomer of said precursor into either (R or (S) salbutamol respectively; then optionally converting said optically pure (R) and/or (S) salbutamol into a pharmaceutically acceptable salt.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: December 4, 2012
    Assignee: Cipla Limited
    Inventors: Yusuf Khwaja Hamied, Rajendra Narayanrao Kankan, Dharmaraj Ramachandra Rao
  • Process for preparing isomers of salbutamol
    Patent number: RE43984
    Abstract: A process for making optically Optically pure (R) and (S) salbutamol comprises obtaining the (R) or (S) isomer of either salbutamol or a salbutamol precursor in substantially optically pure form is obtained by resolving a racemic or optically impure mixture of enantiomers of salbutamol or of said a salbutamol precursor with either (L) or (D) tartaric acid, and where necessary converting said isomer of said precursor into either (R) or (S) salbutamol respectively; then optionally converting said optically pure (R) and/or (S) salbutamol into a pharmaceutically acceptable salt.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: February 5, 2013
    Assignee: Cipla Limited
    Inventors: Yusuf Khwaja Hamied, Rajendra Narayanrao Kankan, Dharmaraj Ramachandra Rao