Patents by Inventor Erik M. Indra

Erik M. Indra 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).

  • Vitreoretinal silicone tamponades made by supercritical fluid extraction
    Patent number: 7276619
    Abstract: A process for the purification of a silicone oil or fluid using neat supercritical carbon dioxide or a supercritical carbon dioxide mixture extraction to produce vitreoretinal silicone tamponades. The subject process is an economical, highly effective, reproducible, contaminant-free method by which unreacted relatively low molecular weight cyclic siloxanes and oligomers are removed from relatively high molecular weight silicone oil or fluid.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: October 2, 2007
    Assignee: Bausch & Lomb Incorporated
    Inventors: Jay F. Kunzler, Joseph C. Salamone, Dharmendra Jani, Erik M. Indra
  • Process for purifying and reusing solvent used to remove extractables
    Patent number: 7022813
    Abstract: A process for treating biomedical devices, especially contact lenses, involves contacting polymeric devices containing extractables with a solvent that dissolves and thereby removes the extractables from the device, treating the solvent to remove extractables from the solvent, thereby purifying the solvent, and using the purified solvent to remove additional extractables from polymeric devices.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: April 4, 2006
    Assignee: Bausch & Lomb Incorporated
    Inventors: Madhu Ayyagari, Erik M. Indra, Mahendra P. Nandu
  • Pulse extraction of ocular medical devices
    Patent number: 6998073
    Abstract: A method of extracting residual materials from a polymeric, ophthalmic biomedical device, such as a contact lens, by using a mixture comprised of a primary solvent, such as carbon dioxide, and a polar co-solvent, such as isopropanol. By exposing the device to the co-solvent, the device expands. By pulsing or varying the concentration of the polar co-solvent in the mixture, the lens dimensions vary accordingly. When the lens is extracted while retained in a mold, the changes in lens dimensions causes the lens to be released from the mold.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: February 14, 2006
    Assignee: Bausch & Lomb Incorporated
    Inventors: Madhu Ayyagari, Mahendra P. Nandu, Erik M. Indra, Alan J. Braun
  • Vitreoretinal silicone tamponades made by supercritical fluid extraction
    Publication number: 20040176628
    Abstract: A process for the purification of a silicone oil or fluid using neat supercritical carbon dioxide or a supercritical carbon dioxide mixture extraction to produce vitreoretinal silicone tamponades. The subject process is an economical, highly effective, reproducible, contaminant-free method by which unreacted relatively low molecular weight cyclic siloxanes and oligomers are removed from relatively high molecular weight silicone oil or fluid.
    Type: Application
    Filed: March 16, 2004
    Publication date: September 9, 2004
    Inventors: Jay F. Kunzler, Joseph C. Salamone, Dharmendra Jani, Erik M. Indra
  • Method for manufacturing lenses
    Publication number: 20040119176
    Abstract: A method of manufacturing an ophthalmic lens, involves contacting the lens with an aqueous solution comprising a surfactant to remove debris from the lens, prior to inspecting and packaging the lens. The aqueous solution may further comprise a buffering agent and/or sodium chloride. Preferred surfactants include polyoxyethylene-polyoxypropylene block copolymer, nonionic surfactants, such as a poloxamer or a poloxamine. The methods may also be employed for additional biomedical devices, such as ophthalmic implants.
    Type: Application
    Filed: December 23, 2002
    Publication date: June 24, 2004
    Applicant: Bausch & Lomb Incorporated
    Inventors: Erning Xia, Erik M. Indra, William J. Appleton, Sanjay Rastogi, Kevin Hall, Mahendra P. Nandu, Dominic V. Ruscio
  • Process for extracting biomedical devices
    Publication number: 20030222362
    Abstract: A process for treating biomedical devices, especially contact lenses, involves contacting polymeric devices containing extractables with a solvent that dissolves and removes the extractables from the devices. The devices are subjected to at least two treatments with fresh solvent to remove extractables in the devices.
    Type: Application
    Filed: March 19, 2003
    Publication date: December 4, 2003
    Applicant: Bausch & Lomb Incorporated
    Inventors: Erik M. Indra, Madhu Ayyagari, Mahendra P. Nandu
  • Supercritical fluid extraction of vitreoretinal silicone tamponades
    Publication number: 20030181749
    Abstract: A process for the purification of a silicone oil or fluid using neat supercritical carbon dioxide or a supercritical carbon dioxide mixture extraction to produce vitreoretinal silicone tamponades. The subject process is an economical, highly effective, reproducible, contaminant-free method by which unreacted relatively low molecular weight cyclic siloxanes and oligomers are removed from relatively high molecular weight silicone oil or fluid.
    Type: Application
    Filed: June 7, 2002
    Publication date: September 25, 2003
    Inventors: Jay F. Kunzler, Joseph C. Salamone, Dharmendra Jani, Erik M. Indra
  • Pulse extraction of ocular medical devices
    Publication number: 20030116873
    Abstract: A method of extracting residual materials from a polymeric, ophthalmic biomedical device, such as a contact lens, by using a mixture comprised of a primary solvent, such as carbon dioxide, and a polar co-solvent, such as isopropanol. By exposing the device to the co-solvent, the device expands. By pulsing or varying the concentration of the polar co-solvent in the mixture, the lens dimensions vary accordingly. When the lens is extracted while retained in a mold, the changes in lens dimensions causes the lens to be released from the mold.
    Type: Application
    Filed: December 17, 2002
    Publication date: June 26, 2003
    Applicant: Bausch & Lomb Incorporated
    Inventors: Madhu Ayyagari, Mahendra P. Nandu, Erik M. Indra, Alan J. Braun
  • Pulse extraction of ocular medical devices
    Patent number: 6514438
    Abstract: A method of extracting residual materials from a polymeric, ophthalmic biomedical device, such as a contact lens, by using a mixture comprised of a primary solvent, such as carbon dioxide, and a polar co-solvent, such as isopropanol. By exposing the device to the co-solvent, the device expands. By pulsing or varying the concentration of the polar co-solvent in the mixture, the lens dimensions vary accordingly. When the lens is extracted while retained in a mold, the changes in lens dimensions causes the lens to be released from the mold.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: February 4, 2003
    Assignee: Bausch & Lomb Incorporated
    Inventors: Madhu Ayyagari, Mahendra P. Nandu, Erik M. Indra, Alan J. Braun
  • Process for purifying and reusing solvent used to remove extractables
    Publication number: 20020132971
    Abstract: A process for treating biomedical devices, especially contact lenses, involves contacting polymeric devices containing extractables with a solvent that dissolves and thereby removes the extractables from the device, treating the solvent to remove extractables from the solvent, thereby purifying the solvent, and using the purified solvent to remove additional extractables from polymeric devices.
    Type: Application
    Filed: May 13, 2002
    Publication date: September 19, 2002
    Inventors: Madhu Ayyagari, Erik M. Indra, Mahendra P. Nandu
  • Process for purifying and reusing solvent used to remove extractables
    Patent number: 6423820
    Abstract: A process for treating biomedical devices, especially contact lenses, involves contacting polymeric devices containing extractables with a solvent that dissolves and thereby removes the extractables from the device, treating the solvent to remove extractables from the solvent, thereby purifying the solvent, and using the purified solvent to remove additional extractables from polymeric devices.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: July 23, 2002
    Assignee: Bausch & Lomb Incorporated
    Inventors: Madhu Ayyagari, Erik M. Indra, Mahendra P. Nandu