Patents by Inventor Tahseen A. Chowdhury

Tahseen A. Chowdhury 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: 11801233
    Abstract: The present disclosure relates to an oral eliglustat transmucosal delivery system. More specifically, the present disclosure is related to an oral transmucosal dosage form comprising a non-disintegrating solid mass comprising (a) a hydrophilic viscosity modifying agent selected from a natural or a synthetic gum with a molecular weight of 10,000 Daltons or greater, (b) a low molecular weight water soluble component with a molecular weight of less than 10,000 Daltons and (c) not more than 70 mg eliglustat, wherein the dosage form is 500 mg or less and provides an oral cavity residence time of at least about 5 minutes, and wherein the dosage form generates a microenvironment inside the oral cavity exhibiting a thixotropic behavior with viscosities of at least 50 poises at 1/sec shear rate and at least 10 poises at 10/sec share rate. The dosage forms of as described herein have at least 30% dose reduction as compared to commercially available eliglustat capsules.
    Type: Grant
    Filed: July 6, 2022
    Date of Patent: October 31, 2023
    Assignee: ABON PHARMACEUTICALS, LLC
    Inventors: Salah U. Ahmed, Yanming Zu, Tahseen A. Chowdhury, Saad Muntazim, Mohammed Irfan Syed
  • Patent number: 11596628
    Abstract: The invention relates to extended-release formulations comprising: (i) a poorly water-soluble active pharmaceutical ingredient; and (ii) a non-aqueous liquid vehicle comprising (a) a hydrophobic lipid comprising a glyceryl ester of a C6-C24 fatty acid, or (b) a hydrophilic organic compound selected from the group consisting of polyethylene glycol, propylene glycol, glycerin, and dimethylsulfoxide, or (c) a combination of (a) and (b), and (iii) an amphiphilic agent wherein the active pharmaceutical ingredient is dispersed as discrete particles having a D90 particle size of about 0.5 ?m to about 25 ?m in the formulation, and wherein the formulation is non-gelling and thixotropic with a viscosity of less than 10 poise at a shear rate of 10/s at 25° C.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: March 7, 2023
    Assignee: Abon Pharmaceuticals, LLC
    Inventors: Salah U. Ahmed, Yanming Zu, Jason LePree, Hetalben Prajapati, Tahseen A. Chowdhury
  • Patent number: 11413271
    Abstract: The present disclosure relates to an oral eliglustat transmucosal delivery system. More specifically, the present disclosure is related to an oral transmucosal dosage form comprising a non-disintegrating solid mass comprising (a) a hydrophilic viscosity modifying agent selected from a natural or a synthetic gum with a molecular weight of 10,000 Daltons or greater, (b) a low molecular weight water soluble component with a molecular weight of less than 10,000 Daltons and (c) not more than 70 mg eliglustat, wherein the dosage form is 500 mg or less and provides an oral cavity residence time of at least about 5 minutes, and wherein the dosage form generates a microenvironment inside the oral cavity exhibiting a thixotropic behavior with viscosities of at least 50 poises at 1/sec shear rate and at least 10 poises at 10/sec share rate. The dosage forms of as described herein have at least 30% dose reduction as compared to commercially available eliglustat capsules.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: August 16, 2022
    Assignee: ABON PHARMACEUTICALS LLC
    Inventors: Salah U. Ahmed, Yanming Zu, Tahseen A. Chowdhury, Saad Muntazim, Mohammed Irfan Syed
  • Patent number: 10821118
    Abstract: This invention relates to dosage forms for the delivery of drugs across the oral mucosa having improved transmucosal permeability. More specifically, the invention relates to an oral transmucosal dosage form comprising a primary vehicle comprising a crystallization inhibition agent (CIA) system and a drug, and a secondary vehicle. It also relates to methods of designing and making this dosage form, methods of administering this dosage form and methods of packaging the dosage forms.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: November 3, 2020
    Assignee: Abon Pharmaceuticals LLC
    Inventors: Salah U. Ahmed, Yanming Zu, Karunakar Neelam, Saad Muntazim, Tahseen A. Chowdhury, Shiying Tian
  • Patent number: 9795616
    Abstract: This invention relates to dosage forms for the delivery of drugs across the oral mucosa having improved transmucosal permeability. More specifically, the invention relates to an oral transmucosal dosage form comprising a primary vehicle comprising a crystallization inhibition agent (CIA) system and a drug, and a secondary vehicle. It also relates to methods of designing and making this dosage form, methods of administering this dosage form and methods of packaging the dosage forms.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: October 24, 2017
    Assignee: Abon Pharmaceuticals LLC
    Inventors: Salah U. Ahmed, Yanming Zu, Karunakar Neelam, Saad Muntazim, Tahseen A. Chowdhury, Shiying Tian
  • Patent number: 9352047
    Abstract: This invention relates to dosage forms for the delivery of drugs across the oral mucosa having improved transmucosal permeability. More specifically, the invention relates to an oral transmucosal dosage form comprising a primary vehicle comprising a crystallization inhibition agent (CIA) system and a drug, and a secondary vehicle. It also relates to methods of designing and making this dosage form, methods of administering this dosage form and methods of packaging the dosage forms.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: May 31, 2016
    Assignee: ABON PHARMACEUTICALS, LLC
    Inventors: Salah U. Ahmed, Yanming Zu, Karunakar Neelam, Saad Muntazim, Tahseen A. Chowdhury, Shiying Tian
  • Patent number: 8323679
    Abstract: The present invention is directed to flexible, compressed intravaginal rings comprising a substantially homogeneous compressed mixture comprising a polymethacrylate, a plasticizer, and an active agent, and methods of making and using the same, and apparatus for making the same.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: December 4, 2012
    Assignee: TEVA Women's Health, Inc.
    Inventors: Salah U. Ahmed, Tahseen A. Chowdhury, Yi Luo
  • Patent number: 8226980
    Abstract: The present invention is directed to non-effervescent, orally disintegrating solid pharmaceutical dosage forms comprising progestin and methods of making and using the dosage forms to treat conditions in females in need thereof.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: July 24, 2012
    Inventors: Salah U. Ahmed, Sundeep Sethia, Tahseen A. Chowdhury
  • Patent number: 8202534
    Abstract: The present invention relates to a method of attaching a handle to a solid oral dosage form by use of high frequency mechanical vibrations. The present invention also relates to a method of attaching a handle to a solid oral dosage form, the method comprising: (a) placing a handle in contact with a solid oral dosage form, wherein an area of contact between the handle and the solid oral dosage form forms a joint interface; (b) applying high frequency mechanical vibrations to the joint interface until the solid oral dosage form at the joint interface reaches a molten state; and (c) cooling the joint interface in a molten state to allow solidification, thereby attaching the handle to the solid oral dosage form.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: June 19, 2012
    Assignee: Teva Women's Health, Inc.
    Inventors: Tahseen A. Chowdhury, Edward J. Gabrielski, Christopher H. Baker
  • Publication number: 20110212155
    Abstract: The present invention is directed to flexible, compressed intravaginal rings comprising a substantially homogeneous compressed mixture comprising a polymethacrylate, a plasticizer, and an active agent, and methods of making and using the same, and apparatus for making the same.
    Type: Application
    Filed: January 5, 2011
    Publication date: September 1, 2011
    Inventors: Salah U. AHMED, Tahseen A. Chowdhury, Yi Luo
  • Publication number: 20110136771
    Abstract: The present invention is directed to non-effervescent, orally disintegrating solid pharmaceutical dosage forms comprising progestin and methods of making and using the dosage forms to treat conditions in females in need thereof.
    Type: Application
    Filed: December 2, 2010
    Publication date: June 9, 2011
    Inventors: Salah U. AHMED, Sundeep Sethia, Tahseen A. Chowdhury
  • Patent number: 7908729
    Abstract: A method for attaching a handle to a tablet to form a lollipop utilizes a specific work holder. The work holder has a tooling pallet with a plurality of openings going from a top surface to a bottom surface. A bullet and a spring are located in each opening and held in place by a plate that slides through a groove in the bottom surface of the tooling pallet to block the openings in the bottom surface. Each spring is positioned between a bullet and the plate. A tablet is placed in a cavity of each bullet and a handle is placed in contact with each tablet. High frequency mechanical vibrations, such as ultrasonic vibrations, are applied to a joint interface between each tablet and bullet until the joint interface reaches a molten state. The joint interfaces are then allowed to cool, thereby attaching a handle to each tablet and forming a lollipop.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: March 22, 2011
    Assignee: Teva Women's Health, Inc.
    Inventors: Tahseen A. Chowdhury, Edward J. Gabrielski, Christopher H. Baker
  • Patent number: 7910126
    Abstract: The present invention is directed to flexible, compressed intravaginal rings comprising a substantially homogeneous compressed mixture comprising a polymethacrylate, a plasticizer, and an active agent, and methods of making and using the same, and apparatus for making the same.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: March 22, 2011
    Assignee: TEVA Women's Health, Inc.
    Inventors: Salah U. Ahmed, Tahseen A. Chowdhury, Yi Luo
  • Publication number: 20110046115
    Abstract: A non-effervescent, solid dosage form containing mirtazapine, which is used to form mirtazapine pharmaceutical tablets. The dosage form contains mirtazapine, a hydrophilic component, and at least one lubricant. In some embodiments, the dosage forms contain a salivating agent. Processes for producing mirtazapine orally disintegrating tablets are also provided.
    Type: Application
    Filed: October 28, 2010
    Publication date: February 24, 2011
    Applicant: WATSON LABORATORIES, INC.
    Inventors: Salah U. Ahmed, Gandha V. Naringrekar, Tahseen A. Chowdhury, Sudhir R. Gorukanti
  • Patent number: 7867515
    Abstract: The present invention is directed to non-effervescent, orally disintegrating solid pharmaceutical dosage forms comprising progestin and methods of making and using the dosage forms to treat conditions in females in need thereof.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: January 11, 2011
    Assignee: TEVA Woman's Health, Inc.
    Inventors: Salah U. Ahmed, Sundeep Sethia, Tahseen A. Chowdhury
  • Patent number: 7838029
    Abstract: A non-effervescent, solid dosage form containing mirtazapine, which is used to form mirtazapine pharmaceutical tablets. The dosage form contains mirtazapine, a hydrophilic component, and at least one lubricant. In some embodiments, the dosage forms contain a salivating agent. Processes for producing mirtazapine orally disintegrating tablets are also provided.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: November 23, 2010
    Assignee: Watson Laboratories, Inc.
    Inventors: Salah U. Ahmed, Gandha V. Naringrekar, Tahseen A. Chowdhury, Sudhir R. Gorukanti
  • Patent number: 7811604
    Abstract: The present invention is directed to non-effervescent, orally disintegrating dosage forms comprising free base clozapine that are substantially free of acids, water-soluble polymers, taste-masking polymers, and coatings, and methods of making and using the same.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: October 12, 2010
    Assignee: Barr Laboratories, Inc.
    Inventors: Salah U. Ahmed, Lianli Li, Tahseen A. Chowdhury
  • Publication number: 20080175906
    Abstract: The present invention is directed to non-effervescent, orally disintegrating solid pharmaceutical dosage forms comprising progestin and methods of making and using the dosage forms to treat conditions in females in need thereof.
    Type: Application
    Filed: December 20, 2007
    Publication date: July 24, 2008
    Inventors: Salah U. Ahmed, Sundeep Sethia, Tahseen A. Chowdhury
  • Patent number: 7390503
    Abstract: An ondansetron solid orally disintegrating dosage form for oral administration having at least one first water-dispersible component or water-insoluble cellulose derivative, a component having a —CHOH functional group, a disintegrating agent and at least one lubricant is provided. The dosage form can comprise ondansetron, a hydrophilic polymer such as microcrystalline cellulose, a component having a —CHOH functional group such as mannitol or xylitol and a disintegrating agent such as crospovidone. The lubricant may be a mixture of magnesium stearate, sodium stearyl fumarate and colloidal silicon dioxide. The present invention provides a non-effervescent tablet comprising the ondansetron dosage form. Another aspect of the invention is the treatment of emesis such as nausea and vomiting caused by cancer chemotherapy and radiation by the administration of the ondansetron formulation of the present composition.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: June 24, 2008
    Assignee: Barr Laboratories, Inc.
    Inventors: Salah U. Ahmed, Sudhir R. Gorukanti, Tahseen A. Chowdhury