Patents by Inventor Srinivasan Sridharan

Srinivasan Sridharan 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).

  • SOLAR CELL METALLIZATIONS CONTAINING ORGANOZINC COMPOUND
    Publication number: 20140373913
    Abstract: Paste compositions, methods of making paste compositions, contacts, and methods of making contacts are disclosed. The paste compositions include a solid portion and a vehicle system. The solid portion includes a conductive metal component and a glass binder. The vehicle system includes organometallic compound containing zinc. The organometallic compounds containing zinc can be dissolved in the vehicle system and the vehicle system does not include particles that contain zinc. The paste compositions can be used to form contacts in solar cells or other related components.
    Type: Application
    Filed: January 16, 2013
    Publication date: December 25, 2014
    Inventors: Yi Yang, Srinivasan Sridharan, Aziz S. Shaikh, Kenneth A. Clark
  • Method of making solar cell contacts
    Patent number: 8889041
    Abstract: Formulations and methods of making solar cells are disclosed. In general, the invention presents a solar cell contact made from a mixture wherein the mixture comprises a solids portion and an organics portion, wherein the solids portion comprises from about 85 to about 99 wt % of silver, and from about 1 to about 15 wt % of a glass component wherein the glass component comprises from about 15 to about 75 mol % PbO, and from about 5 to about 50 mol % SiO2, and preferably with no B2O3.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: November 18, 2014
    Assignee: Heraeus Precious Metals North America Conshohocken LLC
    Inventors: Srinivasan Sridharan, Tung Pham, Chandrashekhar S. Khadilkar, Aziz S. Shaikh
  • Induction Sealing of Inorganic Substrates
    Publication number: 20140299256
    Abstract: A method of sealing at least two inorganic substrates together using an induction energy source comprising applying to at least one of the substrates a paste composition including a glass frit, and an induction coupling additive, bringing at least a second substrate into contact with the paste composition, and subjecting the substrates and paste to induction heating, thereby forming a hermetic seal between the two inorganic substrates.
    Type: Application
    Filed: September 12, 2012
    Publication date: October 9, 2014
    Applicant: FERRO CORPORATION
    Inventors: Srinivasan Sridharan, George E. Sakoske, Chandrashekhar S. Khadilkar, Gregory R. Prinzbach, John J. Maloney
  • Microwave Sealing Of Inorganic Substrates Using Low Melting Glass Systems
    Publication number: 20140261975
    Abstract: A frit-based hermetic sealing system for sealing glass plates to one another, or sealing glass to ceramics is disclosed. Seal materials, the methods to apply these seal materials, and the seal designs for selective and controlled absorption of microwave energy to heat and seal the system are presented. The hermetic seals are useful in various applications such as (a) encapsulating solar cells based on silicon, organic systems, and thin film, (b) encapsulating other electronic devices such as organic LEDs, (c) producing Vacuum Insulated Glass windows, and (d) architectural windows and automotive glass.
    Type: Application
    Filed: November 1, 2012
    Publication date: September 18, 2014
    Inventors: Srinivasan Sridharan, John J. Maloney, Chandrashekhar S. Khadilkar, Robert P. Blonski, Gregory R. Prinzbach, George E. Sakoske
  • Methods of forming coating layers for medical devices utilizing flash vaporization
    Patent number: 8828418
    Abstract: Methods are disclosed for controlling the morphology and the release-rate of active agent from coating layers for medical devices comprising a polymer matrix and one or more active agents. The methods comprise fixing the morphology or phase distribution of the active agent prior to removing solvent from the coating composition. The coating layers can be used for controlled the delivery of an active agent or a combination of active agents.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: September 9, 2014
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Florian N. Ludwig, Syed F. A. Hossainy, Srinivasan Sridharan, Carol Lee
  • Methods and compositions to treat myocardial conditions
    Patent number: 8821473
    Abstract: Methods, devices, kits and compositions to treat a myocardial infarction. In one embodiment, the method includes the prevention of remodeling of the infarct zone of the ventricle. In other embodiments, the method includes the introduction of structurally reinforcing agents. In other embodiments, agents are introduced into a ventricle to increase compliance of the ventricle. In an alternative embodiment, the prevention of remodeling includes the prevention of thinning of the ventricular infarct zone. In another embodiment, the prevention of remodeling and thinning of the infarct zone involves the cross-linking of collagen and prevention of collagen slipping. In other embodiments, the structurally reinforcing agent may be accompanied by other therapeutic agents. These agents may include but are not limited to pro-fibroblastic and angiogenic agents.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: September 2, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Eugene T. Michal, Evgenia Mandrusov, Charles D. Claude, Ni Ding, Murthy Simhambhatla, Syed Faiyaz Ahmed Hossainy, Srinivasan Sridharan, Paul Consigny
  • Oxides and glasses for use with aluminum back solar cell contacts
    Patent number: 8815636
    Abstract: Solar cell contacts having good electrical performance are made by a process involving: (a) providing a silicon wafer substrate; (b) providing a paste comprising: (i) aluminum, (ii) glass frit, and (iii) a separate and distinct amount of at least one oxide, such that, together with the aluminum, the glass frit and oxide forms a paste having an exothermic reaction peak, at a temperature of at least 660° C. to less than 900° C., (c) applying the paste to the silicon wafer substrate to form a coated substrate, and (d) firing the coated substrate for a time and at a temperature sufficient to sinter the aluminum and fuse the glass frit and oxide.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: August 26, 2014
    Assignee: Heraeus Precious Metals North America Conshohocken LLC
    Inventors: Chandrashekhar S. Khadilkar, Srinivasan Sridharan, Nazarali Merchant, Jackie Davis, Aziz S. Shaikh, Hong Jiang
  • Thick film pastes for fire through applications in solar cells
    Patent number: 8802970
    Abstract: Formulations and methods of making solar cell contacts and cells therewith are disclosed. The invention provides a photovoltaic cell comprising a front contact, a back contact, and a rear contact. The back contact comprises, prior to firing, a passivating layer onto which is applied a paste, comprising aluminum, a glass component, wherein the aluminum paste comprises, aluminum, another optional metal, a glass component, and a vehicle. The back contact comprises, prior to firing, a passivating layer onto which is applied an aluminum paste, wherein the aluminum paste comprises aluminum, a glass component, and a vehicle.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: August 12, 2014
    Assignee: Heraeus Precious Metals North America Conshohocken LLC
    Inventors: Nazarali Merchant, Aziz S. Shaikh, Srinivasan Sridharan
  • Hot-melt sealing glass compositions and devices using the same
    Patent number: 8786034
    Abstract: Hot-melt sealing glass compositions that include one or more glass frits dispersed in a polymeric binder system. The polymeric binder system is a solid at room temperature, but melts at a temperature of from about 35° C. to about 90° C., thereby forming a flowable liquid dispersion that can be applied to a substrate (e.g., a cap wafer and/or a device wafer of a MEMS device) by screen printing. Hot-melt sealing glass compositions according to the invention rapidly re-solidify and adhere to the substrate after being deposited by screen printing. Thus, they do not tend to spread out as much as conventional solvent-based glass frit bonding pastes after screen printing. And, because hot-melt sealing glass compositions according to the invention are not solvent-based systems, they do not need to be force dried after deposition.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: July 22, 2014
    Assignee: Ferro Corporation
    Inventors: Robert D. Gardner, Keith M. Mason, Srinivasan Sridharan, Aziz S. Shaikh
  • Aluminum-boron solar cell contacts
    Patent number: 8759668
    Abstract: Formulations and methods of making solar cells are disclosed. In general, the invention provides a solar cell comprising a contact made from a mixture wherein, prior to firing, the mixture comprises at least one aluminum source, at least one boron source, and about 0.1 to about 10 wt % of a glass component. Within the mixture, the overall content of aluminum is about 50 wt % to about 85 wt % of the mixture, and the overall content of boron is about 0.05 to about 20 wt % of the mixture.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: June 24, 2014
    Assignee: Heraeus Precious Metals North America Conshohocken LLC
    Inventors: Jalal Salami, Srinivasan Sridharan, Steve S. Kim, Aziz S. Shaikh
  • Methods and compositions to treat myocardial conditions
    Patent number: 8747385
    Abstract: Methods, devices, kits and compositions to treat a myocardial infarction. In one embodiment, the method includes the prevention of remodeling of the infarct zone of the ventricle. In other embodiments, the method includes the introduction of structurally reinforcing agents. In other embodiments, agents are introduced into a ventricle to increase compliance of the ventricle. In an alternative embodiment, the prevention of remodeling includes the prevention of thinning of the ventricular infarct zone. In another embodiment, the prevention of remodeling and thinning of the infarct zone involves the cross-linking of collagen and prevention of collagen slipping. In other embodiments, the structurally reinforcing agent may be accompanied by other therapeutic agents. These agents may include but are not limited to pro-fibroblastic and angiogenic agents.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: June 10, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Eugene T. Michal, Evgenia Mandrusov, Charles D. Claude, Ni Ding, Murthy Simhambhatla, Syed Faiyez Ahmed Hossainy, Srinivasan Sridharan, Paul Consigny
  • Vanadium, cobalt and strontium additives for use in aluminum back solar cell contacts
    Patent number: 8709862
    Abstract: Al pastes with additives of Co, Sr, V, compounds thereof and combinations thereof improve both the physical integrity of a back contact of a silicon solar cell as well as the electrical performance of a cell with such a contact.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: April 29, 2014
    Assignee: Heraeus Precious Metals North America Conshohocken LLC
    Inventors: Hong Jiang, Chandrashekhar S. Khadilkar, Nazarali Merchant, Srinivasan Sridharan, Aziz S. Shaikh
  • Coating Layers For Medical Devices And Method Of Making The Same
    Publication number: 20140037831
    Abstract: Methods are disclosed for controlling the morphology and the release-rate of active agent from coating layers for medical devices comprising a polymer matrix and one or more active agents. The methods comprise fixing the morphology or phase distribution of the active agent prior to removing solvent from the coating composition. The coating layers can be used for controlled the delivery of an active agent or a combination of active agents.
    Type: Application
    Filed: October 10, 2013
    Publication date: February 6, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Florian N. Ludwig, Syed F.A. Hossainy, Srinivasan Sridharan, Carol Lee
  • Coating Layers For Medical Devices And Method Of Making The Same
    Publication number: 20140037832
    Abstract: Methods are disclosed for controlling the morphology and the release-rate of active agent from coating layers for medical devices comprising a polymer matrix and one or more active agents. The methods comprise fixing the morphology or phase distribution of the active agent prior to removing solvent from the coating composition. The coating layers can be used for controlled the delivery of an active agent or a combination of active agents.
    Type: Application
    Filed: October 15, 2013
    Publication date: February 6, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Florian N. Ludwig, Syed F.A. Hossainy, Srinivasan Sridharan, Carol Lee
  • Formation Of Glass-Based Seals Using Focused Infrared Radiation
    Publication number: 20140026619
    Abstract: Broadband infrared radiation is used to heat and fuse an enamel paste to form an enamel seal between at least two solid substrates such as glass, ceramic or metal.
    Type: Application
    Filed: July 22, 2013
    Publication date: January 30, 2014
    Applicant: FERRO CORPORATION
    Inventors: John J. Maloney, Andrew M. Rohn, JR., Chandrashekhar S. Khadilkar, Srinivasan Sridharan, Robert P. Blonski, George E. Sakoske
  • Solar cell contacts containing aluminum and at least one of boron, titanium, nickel, tin, silver, gallium, zinc, indium and copper
    Patent number: 8575474
    Abstract: Formulations and methods of making solar cell contacts and cells therewith are disclosed. In general, the invention provides a solar cell comprising a contact made from a mixture wherein, prior to firing, the mixture comprises at least one aluminum source, at least one source of a metal including one or more of boron, titanium, nickel, tin, gallium zinc, indium, and copper, and about 0.1 to about 10 wt % of a glass component. Within the mixture, the overall content of aluminum is about 50 wt % to about 85 wt % of the mixture, and the overall combined content of boron, nickel, tin, silver, gallium, zinc, indium, copper, is about 0.05 to about 40 wt % of the mixture.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: November 5, 2013
    Assignee: Heracus Precious Metals North America Conshohocken LLC
    Inventors: Jalal Salami, Srinivasan Sridharan, Steve S. Kim, Aziz S. Shaikh
  • Methods of forming coating layers for medical devices utilizing flash vaporization
    Patent number: 8568764
    Abstract: Methods are disclosed for controlling the morphology and the release-rate of active agent from coating layers for medical devices comprising a polymer matrix and one or more active agents. The methods comprise fixing the morphology or phase distribution of the active agent prior to removing solvent from the coating composition. The coating layers can be used for controlled the delivery of an active agent or a combination of active agents.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: October 29, 2013
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Florian N. Ludwig, Syed F. A. Hossainy, Srinivasan Sridharan, Carol Lee
  • Solar Cell Metallizations Containing Metal Additive
    Publication number: 20130277624
    Abstract: Paste compositions, methods of making a paste composition, and methods of making a solar cell contact are disclosed. The paste composition can contain silver, a glass frit, a metal additive and an organic vehicle system. The metal additive is at least one selected from the group consisting of yttrium, an organo-vanadium compound, organo-antimony compound, organo-phosphorus compound, and an organo-yttrium compound. The paste can be used for making a solar cell contact.
    Type: Application
    Filed: October 27, 2011
    Publication date: October 24, 2013
    Applicant: Heraeus Precious Metals North America Conshohocken LLC
    Inventors: Yi YANG, Aziz S. SHAIKH, Srinivasan SRIDHARAN
  • High Performance Organic, Inorganic Or Hybrid Seals
    Publication number: 20130236662
    Abstract: The present invention describes a new method for creating hybrid edge seals using metal, alloy, powder coated metal and other conductive surfaces in between two substrates. The methods utilize various materials, seal designs, and geometries of hybrid seals based on polymeric powder coatings and glass powder coatings.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 12, 2013
    Applicant: FERRO CORPORATION
    Inventors: Vineet Dua, Chandrashekhar S. Khadilkar, Srinivasan Sridharan, George E. Sakoske
  • Hermetically Sealed Electronic Device Using Solder Bonding
    Publication number: 20130206230
    Abstract: Solder can be used to wet and bind glass substrates together to ensure a hermetic seal that superior (less penetrable) than conventional polymeric (thermoplastic or thermoplastic elastomer) seals in electric and electronic applications.
    Type: Application
    Filed: July 22, 2011
    Publication date: August 15, 2013
    Applicant: Ferro Corporation
    Inventors: Srinivasan Sridharan, Robert P. Blonski, Chandrashekhar Khadilkar, John J. Maloney