Patents Represented by Attorney, Agent or Law Firm Jayadeep R. Deshmukh
-
Patent number: 8097144Abstract: A cell for the electrowinning of aluminium has a cavity for containing electrolyte (20) and one or more non emerging active anode bodies (5) that are suspended in the electrolyte. The electrolyte's surface (21,21?) has an expanse extending over the cavity and is substantially covered by a self-formed crust (25) of frozen electrolyte. The crust is mechanically reinforced by at least one preformed refractory body (30, 30?,30?). The electrolyte crust is formed against the preformed refractory body and bonded thereto so as to inhibit mechanical failure of the crust and collapse of the crust into the cavity.Type: GrantFiled: February 26, 2007Date of Patent: January 17, 2012Assignee: Rio Tinto Alean International LimitedInventors: Thinh T. Nguyen, René Von Kaenel, Vittorio De Nora
-
Patent number: 8093314Abstract: The present invention provides an improved single component coating composition for automotive/marine repair which is useable as a body filler.Type: GrantFiled: May 13, 2011Date of Patent: January 10, 2012Inventor: Ronald Richard Savin
-
Patent number: 8025785Abstract: A cell for the electrowinning of aluminium (50) from alumina dissolved in a molten electrolyte comprises a generally horizontal cell bottom (5), preferably aluminium-wettable, on which a pool of product aluminium (50) is collected from at least one electrically conductive cathodic element (10) having aluminium-wettable cathode surfaces (11). The cathodic element comprises an inclined cathodic wall (10) in the electrolyte (60) above the generally horizontal cell bottom (5). The cathodic wall (10) has an upwardly-oriented inclined face (11) that forms a sloping upper aluminium-wettable drained active cathode surface on which aluminium is produced and drains into the aluminium pool (50), and a downwardly-oriented inclined face (12) which is in contact with the molten electrolyte (60) and which overlies the aluminium pool (50). The aluminium pool (50) covers substantially the entire cell bottom (5) including underneath the cathodic wall (10).Type: GrantFiled: August 29, 2002Date of Patent: September 27, 2011Assignee: Rio Tinto Alcan International LimitedInventor: Vittorio De Nora
-
Patent number: 7959772Abstract: A cell for the electrowinning of aluminum (50) from alumina, comprises an inclined plate-like or grid-like open anode structure (25) which has a generally v-shaped configuration in cross-section. The anode structure (25) has a downwardly-oriented sloping electrochemically active surface that is generally v-shaped in cross-section and spaced above an upwardly-oriented corresponding sloping cathode surface (11) by an anode-cathode gap (40) in which alumina dissolved in a circulating electrolyte (60) is electrolysed. The anode structure (25) has a plurality of anode through-passages (45) distributed thereover for an up-flow of alumina-depleted electrolyte (60) from the anode-cathode gap (40).Type: GrantFiled: August 29, 2002Date of Patent: June 14, 2011Assignee: Riotinto Alcan International LimitedInventor: Vittorio De Nora
-
Patent number: 7935241Abstract: A slurry comprises suspended aluminum particles in a colloid having dispersed colloidal particles of a metal oxide such as a hydroxide. The metal oxide is reducible by metallic aluminum. The slurry has such a basic pH that dissolution of the aluminum particles in the slurry is inhibited so that when the slurry is subjected to a heat treatment, the undissolved aluminum particles are reactable with the colloidal particles to form an aluminum-based mixture resistant to chemical attack made of aluminum oxide, metal aluminum and the metal of the colloidal particles. The slurry can be used to form an aluminum-based protective coating on a component, in particular of an aluminum electrowinning cell or an apparatus for treating molten aluminum.Type: GrantFiled: March 6, 2006Date of Patent: May 3, 2011Assignee: Rio Tinto Alcan International LimitedInventors: Thinh T. Nguyen, Vittorio De Nora
-
Patent number: 7811425Abstract: An anode for electrowinning aluminium comprises an electrically conductive substrate that is covered with an applied electrochemically active coating comprising a layer that contains predominantly cobalt oxide CoO. The CoO layer can be connected to the substrate through an oxygen barrier layer, in particular containing copper, nickel, tungsten, molybdenum, tantalum and/or niobium.Type: GrantFiled: March 18, 2005Date of Patent: October 12, 2010Assignee: Moltech Invent S.A.Inventors: Vittorio De Nora, Thinh T. Nguyen
-
Patent number: 7749363Abstract: A cell for the electrowinning of aluminium by the electrolysis from an aluminium compound dissolved in a molten electrolyte (50), comprises: (I) a plurality of non-carbon anodes (10), each anode being suspended in operating in the molten electrolyte by an anode stem (11) that connects the anode (10) to a positive current source; and (II) a thermic insulating cover (60,60?) which covers the electrolyte (50) and through which each anode stem (11) extends from the positive current source to an anode (10). The insulating cover (60,60?) comprises a plurality of movable sections (60) that together cover a substantial part of the electrolyte (50). Each movable section (60) covers a corresponding portion of the electrolyte (50) that is located therebelow and that can be uncovered by moving the corresponding movable section (60).Type: GrantFiled: June 3, 2003Date of Patent: July 6, 2010Assignee: Moltech Invent SAInventors: Vittorio De Nora, Georges Berclaz
-
Patent number: 7740745Abstract: A cell for electrowinning aluminium from alumina, comprises: a metal-based anode having an electrochemically active outer part comprising a layer that contains predominantly cobalt oxide CoO; and a fluoride-containing molten electrolyte in which the active anode surface is immersed. The electrolyte is at a temperature below 950° C., in particular in the range from 910° to 940° C. The electrolyte consists of: 6.5 to 11 weight. % dissolved alumina; 35 to 44 weight % aluminium fluoride; 38 to 46 weight % sodium fluoride; 2 to 15 weight % potassium fluoride; 0 to 5 weight % calcium fluoride; and 0 to 5 weight % in total of one or more further constituents.Type: GrantFiled: March 18, 2005Date of Patent: June 22, 2010Assignee: Moltech Invent S.A.Inventors: Thinh T. Nguyen, Vittorio De Nora
-
Patent number: 7560479Abstract: This invention relates to derivatives of 3,6-disubstituted azabicyclo hexanes. The compounds of this invention can function as muscarinic receptor antagonists and can be used for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors.Type: GrantFiled: April 10, 2003Date of Patent: July 14, 2009Assignee: Ranbaxy Laboratories LimitedInventors: Anita Mehta, Bruhaspathy Miriyala, Arundutt Viswanatham Silamkoti, Jang Bahadar Gupta
-
Patent number: 7517905Abstract: This invention relates to the derivatives of substituted azabicyclo hexanes. The compounds of this invention can function as muscarinic receptor antagonists and can be used for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors. The invention also relates to a process for the preparation of the compounds of the present invention, pharmaceutical compositions containing the compounds of the present invention and the methods of treating the diseases mediated through muscarinic receptors.Type: GrantFiled: April 9, 2003Date of Patent: April 14, 2009Assignee: Ranbaxy Laboratories LimitedInventors: Anita Mehta, Bruhaspathy Miriyala, Sudershan Kumar Arora, Jang Bahadur Gupta
-
Patent number: 7501443Abstract: This invention generally relates to the derivatives of 3.6-disubstituted azabicyclo [3.1.0] hexanes of the following formula [IA]. The compounds of this invention can function as muscarinic receptor antagonists, and can be used for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors. The invention also relates to a process for the preparation of the compounds of the present invention, pharmaceutical compositions containing the compounds of the present invention and the :h1ethods for treating the diseases mediated through muscarinic receptors.Type: GrantFiled: December 23, 2002Date of Patent: March 10, 2009Assignee: Ranbaxy Laboratories LimitedInventors: Anita Mehta, Sanjay Kumar Srivastava, Jang Bahadur Gupta
-
Patent number: 7488748Abstract: This invention generally relates to derivatives of 3,6 disubstituted azabicyclo hexanes. The compounds of this invention can function as muscarinic receptor antagonists and can be used for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors. The invention also relates to pharmaceutical compositions containing the compounds of the present invention and the methods of treating the diseases mediated through muscarinic receptors.Type: GrantFiled: January 23, 2003Date of Patent: February 10, 2009Assignee: Ranbaxy Laboratories LimitedInventors: Anita Mehta, Arundutt V. Silamkoti, Naresh Kumar, Jang Bahadur Gupta
-
Patent number: 7482463Abstract: The invention relates to an amorphous form of the salts of the (-) enantiomer or (S)-enantiomer of omeprazole, i.e., esomeprazole. The invention also relates to processes for preparing amorphous esomeprazole salts and pharmaceutical compositions that include the amorphous esomeprazole salts.Type: GrantFiled: November 28, 2007Date of Patent: January 27, 2009Assignee: Ranbaxy Laboratories LimitedInventors: Mahavir Singh Khanna, Bakthavathsalan Vijayaraghavan, Mohan Prasad, Yatendra Kumar
-
Patent number: 7465751Abstract: This invention generally relates to the derivatives of 1-substituted-3-pyrroli dines having the structure of Formula (I): The compounds of this invention can function as muscarinic receptor antagonists, and can be used for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors. The invention also relates to a process for the preparation of the compounds of the present invention. pharmaceutical compositions containing the compounds of the present invention and the methods for treating the diseases mediated through muscarinic receptors.Type: GrantFiled: December 23, 2002Date of Patent: December 16, 2008Assignee: Ranbaxy Laboratories LimitedInventors: Anita Mehta, Jang Bahadur Gupta, Pakala Kumara Savithru Sarma
-
Patent number: 7462712Abstract: The present invention relates to an improved process for the preparation of imipenem comprising reacting a bicyclo ketone precursor of the Formula II, wherein R is a protecting group, with a phosphorohalidate in the presence of a base and a catalytic amount of dialkylaminopyridine.Type: GrantFiled: May 15, 2002Date of Patent: December 9, 2008Assignee: Ranbaxy Laboratories LimitedInventors: Yatendra Kumar, Neera Tewari, Bishwa Prakash Rai
-
Patent number: 7431812Abstract: An anode for the electrowinning of aluminium by the electrolysis of alumina in a molten fluoride electrolyte has an electrochemically active integral outside oxide layer obtainable by surface oxidation of a metal alloy which consists of 20 to 60 weight % nickel; 5 to 15 weight % copper; 1.5 to 5 weight % aluminium; 0 to 2 weight % in total of one or more rare earth metals, in particular yttrium; 0 to 2 weight % of further elements, in particular manganese, silicon and carbon; and the balance being iron. The metal alloy of the anode has a copper/nickel weight ratio in the range of 0.1 to 0.5, preferably 0.2 to 0.3.Type: GrantFiled: March 12, 2003Date of Patent: October 7, 2008Assignee: Moitech Invent S.A.Inventors: Thinh T. Nguyen, Vittorio De Nora
-
Patent number: 7410993Abstract: This invention generally relates to the derivatives of 3,6 disubstituted azabicyclo[3.1.0] hexanes. The compounds of this invention are muscarinic receptor antagonists which are useful, inter-alia, for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors. The invention also relates to a process for the preparation of the compounds of the present invention, pharmaceutical compositions containing the compounds of the present invention and the methods for treating the diseases mediated through muscarinic receptors.Type: GrantFiled: August 9, 2002Date of Patent: August 12, 2008Assignee: Ranbaxy Laboratories LimitedInventors: Anita Mehta, Arundutt V. Silamkoti, Miriyala Bruhaspathy, Jang Bahadur Gupta
-
Patent number: 7399779Abstract: This invention generally relates to the derivatives of novel 3,6 disubstituted azabicyclo[3.1.0]hexanes. The compounds of this invention are muscarinic receptor antagonists which are useful, inter-alia for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors. The invention also relates to pharmaceutical compositions containing the compounds of the present invention and the methods of treating the diseases mediated through muscarinic receptors.Type: GrantFiled: July 8, 2002Date of Patent: July 15, 2008Assignee: Ranbaxy Laboratories LimitedInventors: Anita Mehta, Arundutt V. Silamkoti, Jang Bahadur Gupta
-
Patent number: 7332600Abstract: The present invention relates to a cost effective and industrially advantageous process for the preparation of imipenem of high purity, which comprises dissolving crude imipenerm in warm water to which some base has been added to obtain a solution, subjecting the resultant solution to activated carbon treatment, and adding an organic solvent to precipitate imipienem monohydrate as a crystalline product.Type: GrantFiled: November 18, 2002Date of Patent: February 19, 2008Assignee: Ranbaxy Laboratories LimitedInventors: Bishwa Prakash Rai, Neera Tewari, Yatendra Kumar
-
Patent number: 7265147Abstract: This invention generally relates to the derivatives of 3,6 disubstituted azabicyclo[3.1.0]hexanes. The compounds of this invention are muscarinic receptor antagonists which are useful, inter-alia, for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors. The invention also relates to a process for the preparation of compounds of the present invention, pharmaceutical compositions containing the compounds of the present invention and the methods for treating the diseases mediated through muscarinic receptors.Type: GrantFiled: July 31, 2002Date of Patent: September 4, 2007Assignee: Ranbaxy Laboratories LimitedInventors: Anita Mehta, Arundutt V. Silamkoti, Kirandeep Kaur, Jang Bahadur Gupta