Patents by Inventor Andrew W. Gieschen
Andrew W. Gieschen 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).
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Patent number: 7958890Abstract: A dry powder inhaler has a dispersion chamber containing beads. A dose of dry powder is released into the chamber, or into an inlet tangentially joining into the chamber. As the patient inhales on a nosepiece or mouthpiece, air moves circularly through the dispersion chamber to drive the beads. The beads roll, bounce, and collide repeatedly with the drug particles on the chamber surfaces or on the beads. The smaller active drug particles are separated from larger carrier particles and from each other, and a powder aerosol is created and inhaled by the patient. The beads are preferably lightweight, so that they can be rapidly accelerated and moved, even with nominal inspiration. The flow resistance of the inhaler is also reduced via the beads, allowing greater airflow and powder dispersion, without any increased effort by the patient.Type: GrantFiled: December 4, 2008Date of Patent: June 14, 2011Assignee: Quadrant Technologies LimitedInventors: Andrew W. Gieschen, Michael Ligotke, Jeffrey Chen, Charles F. Ganem, Bernard Greenspan
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Publication number: 20090084380Abstract: A dry powder inhaler has a dispersion chamber containing beads. A dose of dry powder is released into the chamber, or into an inlet tangentially joining into the chamber. As the patient inhales on a nosepiece or mouthpiece, air moves circularly through the dispersion chamber to drive the beads. The beads roll, bounce, and collide repeatedly with the drug particles on the chamber surfaces or on the beads. The smaller active drug particles are separated from larger carrier particles and from each other, and a powder aerosol is created and inhaled by the patient. The beads are preferably lightweight, so that they can be rapidly accelerated and moved, even with nominal inspiration. The flow resistance of the inhaler is also reduced via the beads, allowing greater airflow and powder dispersion, without any increased effort by the patient.Type: ApplicationFiled: December 4, 2008Publication date: April 2, 2009Inventors: Andrew W. Gieschen, Michael Ligotke, Jeffrey Chen, Charles F. Ganem, Bemard Greenspan
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Patent number: 6971384Abstract: A dry powder inhaler has a dispersion chamber containing beads. A dose of dry powder is released into the chamber, or into an inlet tangentially joining into the chamber. As the patient inhales on a nosepiece or mouthpiece, air moves circularly through the dispersion chamber to drive the beads. The beads roll, bounce, and collide repeatedly with the drug particles on the chamber surfaces or on the beads. The smaller active drug particles are separated from larger carrier particles and from each other, and a powder aerosol is created and inhaled by the patient. The beads are preferably lightweight, so that they can be rapidly accelerated and moved, even with nominal inspiration. The flow resistance of the inhaler is also reduced via the beads, allowing greater airflow and powder dispersion, without any increased effort by the patient.Type: GrantFiled: February 19, 2004Date of Patent: December 6, 2005Assignee: Quadrant Technologies LimitedInventors: Andrew W. Gieschen, Michael Ligotke, Jeffrey Chen, Charles Ganem, Bernard Greenspan
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Publication number: 20040163644Abstract: A dry powder inhaler has a dispersion chamber containing beads. A dose of dry powder is released into the chamber, or into an inlet tangentially joining into the chamber. As the patient inhales on a nosepiece or mouthpiece, air moves circularly through the dispersion chamber to drive the beads. The beads roll, bounce, and collide repeatedly with the drug particles on the chamber surfaces or on the beads. The smaller active drug particles are separated from larger carrier particles and from each other, and a powder aerosol is created and inhaled by the patient. The beads are preferably lightweight, so that they can be rapidly accelerated and moved, even with nominal inspiration. The flow resistance of the inhaler is also reduced via the beads, allowing greater airflow and powder dispersion, without any increased effort by the patient.Type: ApplicationFiled: February 19, 2004Publication date: August 26, 2004Inventors: Andrew W. Gieschen, Michael Ligotke, Jeffrey Chen, Charles F. Ganem, Bernard Greenspan
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Patent number: 6715486Abstract: A dry powder inhaler has a dispersion chamber containing beads. A dose of dry powder is released into the chamber, or into an inlet tangentially joining into the chamber. As the patient inhales on a nosepiece or mouthpiece, air moves circularly through the dispersion chamber to drive the beads. The beads roll, bounce, and collide repeatedly with the drug particles on the chamber surfaces or on the beads. The smaller active drug particles are separated from the larger carrier particles and from each other, and a powder aerosol is created and inhaled by the patient. The beads are preferably lightweight, so that they can be rapidly accelerated and moved, even with nominal inspiration. The flow resistance of the inhaler is also reduced via the beads, allowing greater air flow and powder dispersion, without any increased effort by the patient.Type: GrantFiled: January 31, 2001Date of Patent: April 6, 2004Assignee: Quadrant Technologies LimitedInventors: Andrew W. Gieschen, Michael Ligotke, Jeffrey Chen, Charles Ganem, Bernard Greenspan
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Patent number: 6427688Abstract: A dry powder inhaler has a dispersion chamber containing beads. A dose of dry powder is released into the chamber, or into an inlet tangentially joining into the chamber. As the patient inhales on a nosepiece or mouthpiece, air moves circularly through the dispersion chamber to drive the beads. The beads roll, bounce, and collide repeatedly with the drug particles on the chamber surfaces or on the beads. The smaller active drug particles are separated from the larger carrier particles and from each other, and a powder aerosol is created and inhaled by the patient. The beads are preferably lightweight, so that they can be rapidly accelerated and moved, even with nominal inspiration. The flow resistance of the inhaler is also reduced via the beads, allowing greater air flow and powder dispersion, without any increased effort by the patient.Type: GrantFiled: February 1, 2000Date of Patent: August 6, 2002Assignee: Dura Pharmaceuticals, Icn.Inventors: Michael Ligotke, Andrew W. Gieschen, Robert F. Eisele, Thomas R. Jackson, Jeffrey Chen, Bernard Greenspan, Clyde Witham, Gary Ward
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Publication number: 20010027790Abstract: A dry powder inhaler has a dispersion chamber containing beads. A dose of dry powder is released into the chamber, or into an inlet tangentially joining into the chamber. As the patient inhales on a nosepiece or mouthpiece, air moves circularly through the dispersion chamber to drive the beads. The beads roll, bounce, and collide repeatedly with the drug particles on the chamber surfaces or on the beads. The smaller active drug particles are separated from the larger carrier particles and from each other, and a powder aerosol is created and inhaled by the patient. The beads are preferably lightweight, so that they can be rapidly accelerated and moved, even with nominal inspiration. The flow resistance of the inhaler is also reduced via the beads, allowing greater air flow and powder dispersion, without any increased effort by the patient.Type: ApplicationFiled: January 31, 2001Publication date: October 11, 2001Applicant: Dura Pharmaceuticals, Inc.Inventors: Andrew W. Gieschen, Michael Ligotke, Jeffrey Chen, Charles F. Ganem, Bernard Greenspan